Updated refresh logic to only rerender calendar, when contents changed.

Edit epaperframe.yaml
Merge branch 'epaperframe-gpt5.6'
2026-07-13 15:31:39 +02:00 · 2026-07-13 14:33:32 +02:00 · 2026-07-13 14:28:28 +02:00 · 2026-07-13 13:08:24 +02:00 · 2026-07-13 10:30:47 +02:00 · 2026-07-13 08:45:37 +02:00
30 changed files with 4739 additions and 716 deletions
@@ -1 +1 @@
-2026.3.0
+2026.7.2
@@ -13,4 +13,4 @@ home-assistant.log*
 zigbee.db*
 *__pycache__*
 .ha_run.lock
-
+.cache
@@ -2,9 +2,11 @@
  alias: Licht bei Sonnenuntergang einschalten
  description: ''
  triggers:
-  - event: sunset
-    offset: '-1:00'
-    trigger: sun
+  - trigger: numeric_state
+    entity_id:
+    - sun.sun
+    attribute: elevation
+    below: 5
  conditions:
  - condition: state
    entity_id: person.marcus_scholz
@@ -43,9 +45,11 @@
  alias: Licht bei Sonnenaufgang ausschalten
  description: ''
  triggers:
-  - event: sunrise
-    offset: '+1:00'
-    trigger: sun
+  - trigger: numeric_state
+    entity_id:
+    - sun.sun
+    attribute: elevation
+    above: 5
  conditions: []
  actions:
  - target:
@@ -135,27 +139,33 @@
    trigger: time
  conditions: []
  actions:
-  - action: notify.mobile_app_apollo
-    data:
-      message: Lodere es, Lustknabe.
-      title: 420!
  - data:
      title: 420!
      message: Lodere es, Lustknabe.
    action: notify.mobile_app_le2123
  - data:
      cache: true
-      media_player_entity_id: media_player.raspiaudio_muse_luxe
-      message: 4 20 lodere es, Lustknabe
+      media_player_entity_id: media_player.home_assistant_voice_0a7c6b_media_player
+      message: 4 20, lodere es, Lustknabe
    target:
      entity_id: tts.piper
+    enabled: true
    action: tts.speak
  - data:
      cache: true
      media_player_entity_id: media_player.home_assistant_voice_09c0e7_media_player
-      message: 4 20 lodere es, Lustknabe
+      message: 4 20, lodere es, Lustknabe
    target:
      entity_id: tts.piper
+    enabled: true
+    action: tts.speak
+  - data:
+      cache: true
+      media_player_entity_id: media_player.m5stack_atom_echo
+      message: 4 20, lodere es, Lustknabe
+    target:
+      entity_id: tts.piper
+    enabled: true
    action: tts.speak
  - data:
      qos: 0
@@ -169,6 +179,10 @@
      topic: awtrix_desk/notify
      payload: '{"text": "420, lodere es, Lustknabe!"}'
    action: mqtt.publish
+  - action: notify.mobile_app_apollo
+    data:
+      message: Lodere es, Lustknabe.
+      title: 420!
  mode: single
 - id: '1623911524804'
  alias: TV Anti-Reflexion (undo)
@@ -213,28 +227,28 @@
    action: light.turn_on
  - data:
      cache: true
-      media_player_entity_id: media_player.home_assistant_voice_0a7c6b
+      media_player_entity_id: media_player.home_assistant_voice_0a7c6b_media_player
      message: Ab ins Bett, Schlafenszeit.
    target:
      entity_id: tts.piper
-    action: tts.speak
    enabled: true
+    action: tts.speak
  - data:
      cache: true
-      media_player_entity_id: media_player.home_assistant_voice_09c0e7_media_player_2
+      media_player_entity_id: media_player.home_assistant_voice_09c0e7_media_player
      message: Ab ins Bett, Schlafenszeit.
    target:
      entity_id: tts.piper
-    action: tts.speak
    enabled: true
+    action: tts.speak
  - data:
      cache: true
      media_player_entity_id: media_player.m5stack_atom_echo
      message: Ab ins Bett, Schlafenszeit.
    target:
      entity_id: tts.piper
-    action: tts.speak
    enabled: true
+    action: tts.speak
  mode: single
 - id: '1623954512941'
  alias: Licht im Schlafzimmer zum Aufwachen einschalten
@@ -264,8 +278,10 @@
  alias: 'Anruf: Beim Klingeln grün blinken'
  description: ''
  triggers:
-  - entity_id: sensor.fritz_box_7490_call_monitor_dem_commander1024_seine_cloud
-    to: ringing
+  - entity_id:
+    - sensor.fritz_box_7690_anrufmonitor_dem_commander1024_seine_cloud
+    to:
+    - ringing
    trigger: state
  - entity_id:
    - sensor.le2123_phone_state_2
@@ -287,8 +303,8 @@
      - 0
    target:
      entity_id:
-      - light.awtrix_desk_indicator_1
-      - light.awtrix_kitchen_indicator_1
+      - light.awtrix_b8658c_indicator_1
+      - light.awtrix_528bd4_indicator_1
    action: light.turn_on
  - data:
      scene_id: wled_last_state
@@ -321,16 +337,18 @@
  - data: {}
    target:
      entity_id:
-      - light.awtrix_desk_indicator_1
-      - light.awtrix_kitchen_indicator_1
+      - light.awtrix_b8658c_indicator_1
+      - light.awtrix_528bd4_indicator_1
    action: light.turn_off
  mode: single
 - id: '1625481640348'
  alias: 'Anruf: Beim Telefonieren Musik pausieren'
  description: ''
  triggers:
-  - entity_id: sensor.fritz_box_7490_call_monitor_telefonbuch
-    to: talking
+  - entity_id:
+    - sensor.fritz_box_7690_anrufmonitor_dem_commander1024_seine_cloud
+    to:
+    - talking
    trigger: state
  - entity_id:
    - sensor.le2123_phone_state_2
@@ -348,9 +366,8 @@
  - data:
      scene_id: media_last_state
      snapshot_entities:
-      - media_player.wohnzimmer_main
+      - media_player.wohnzimmer
      - media_player.lg_webos_smart_tv
-      - media_player.ccze
      - media_player.spotify_marcus_scholz
      - media_player.xboxonex
    action: scene.create
@@ -371,7 +388,7 @@
      trigger: state
  - target:
      entity_id:
-      - scene.media_last_state
+      - scene.wled_last_state
    action: scene.turn_on
    data: {}
  mode: single
@@ -479,11 +496,10 @@
    from: not_home
    trigger: state
  conditions:
-  - condition: sun
-    before: sunrise
-    before_offset: '+1'
-    after: sunset
-    after_offset: '-1'
+  - condition: numeric_state
+    entity_id: sun.sun
+    attribute: elevation
+    below: '5'
  actions:
  - data: {}
    action: script.moodlight_orange_plasma
@@ -602,12 +618,33 @@
    action: notify.mobile_app_le2123
  - data:
      cache: true
-      media_player_entity_id: media_player.raspiaudio_muse_luxe
+      media_player_entity_id: media_player.home_assistant_voice_0a7c6b_media_player
      message: '{{message}}

        '
    target:
      entity_id: tts.piper
+    enabled: true
+    action: tts.speak
+  - data:
+      cache: true
+      media_player_entity_id: media_player.home_assistant_voice_09c0e7_media_player
+      message: '{{message}}
+
+        '
+    target:
+      entity_id: tts.piper
+    enabled: true
+    action: tts.speak
+  - data:
+      cache: true
+      media_player_entity_id: media_player.m5stack_atom_echo
+      message: '{{message}}
+
+        '
+    target:
+      entity_id: tts.piper
+    enabled: true
    action: tts.speak
  variables:
    message: 'Die Außentemperatur ist mit {{states(''sensor.aussentemperatur'')}}
@@ -652,12 +689,33 @@
    action: notify.mobile_app_le2123
  - data:
      cache: true
-      media_player_entity_id: media_player.raspiaudio_muse_luxe
+      media_player_entity_id: media_player.home_assistant_voice_0a7c6b_media_player
      message: '{{message}}

        '
    target:
      entity_id: tts.piper
+    enabled: true
+    action: tts.speak
+  - data:
+      cache: true
+      media_player_entity_id: media_player.home_assistant_voice_09c0e7_media_player
+      message: '{{message}}
+
+        '
+    target:
+      entity_id: tts.piper
+    enabled: true
+    action: tts.speak
+  - data:
+      cache: true
+      media_player_entity_id: media_player.m5stack_atom_echo
+      message: '{{message}}
+
+        '
+    target:
+      entity_id: tts.piper
+    enabled: true
    action: tts.speak
  mode: single
  variables:
@@ -817,9 +875,11 @@
  alias: Licht bei Sonnenuntergang einschalten (XMas)
  description: ''
  triggers:
-  - event: sunset
-    offset: '-1:00'
-    trigger: sun
+  - trigger: numeric_state
+    entity_id:
+    - sun.sun
+    attribute: elevation
+    below: 5
  conditions:
  - condition: state
    entity_id: person.marcus_scholz
@@ -846,9 +906,11 @@
  alias: Licht bei Sonnenaufgang ausschalten (XMas)
  description: ''
  triggers:
-  - event: sunrise
-    offset: '+1:00'
-    trigger: sun
+  - trigger: numeric_state
+    entity_id:
+    - sun.sun
+    attribute: elevation
+    above: 5
  conditions: []
  actions:
  - target:
@@ -1034,26 +1096,19 @@
        domain: switch
      action_button_up_double:
      - type: turn_on
-        device_id: 32d15eec63fe68d5770813d47da53657
-        entity_id: 14edfa97dae4936040b97dc77b171d5f
+        device_id: 98a9eef603f8c8ae6200c4834a3dbf4f
+        entity_id: fdcff3852ecc17099c953da17eb4b8a3
        domain: light
      button_up_double_press: true
      button_down_double_press: true
      action_button_down_double:
-      - type: turn_off
-        device_id: 32d15eec63fe68d5770813d47da53657
-        entity_id: 14edfa97dae4936040b97dc77b171d5f
-        domain: light
-      action_button_up_long:
-      - type: turn_on
-        device_id: 98a9eef603f8c8ae6200c4834a3dbf4f
-        entity_id: fdcff3852ecc17099c953da17eb4b8a3
-        domain: light
-      action_button_down_long:
      - type: turn_off
        device_id: 98a9eef603f8c8ae6200c4834a3dbf4f
        entity_id: fdcff3852ecc17099c953da17eb4b8a3
        domain: light
+      action_button_up_long: []
+      action_button_down_long: []
+      button_up_long_max_loop_repeats: 4205
 - id: '1727953214758'
  alias: Waschmaschine läuft
  description: Prüfen ob die Waschmaschine läuft, dann den boolschen Schalter "Waschmaschine
@@ -1145,8 +1200,8 @@
    aktiv" einschalten
  triggers:
  - type: power
-    device_id: 81e357077ac8d1f8f588fbb5324965b5
-    entity_id: fac93f9504dc8d1267bec7d02849d491
+    device_id: 25a822b76a0206496bd216235b034fb0
+    entity_id: 3321a33261062dab534569c3f6f53d69
    domain: sensor
    trigger: device
    above: 150
@@ -1157,8 +1212,8 @@
  conditions:
  - condition: device
    type: is_on
-    device_id: 81e357077ac8d1f8f588fbb5324965b5
-    entity_id: 2a2659668772d9345e42667900832f0e
+    device_id: 25a822b76a0206496bd216235b034fb0
+    entity_id: 4748aace637a3f1d8b5e896236564024
    domain: switch
  actions:
  - action: input_boolean.turn_on
@@ -1172,11 +1227,11 @@
    Uhr.
  triggers:
  - type: power
-    device_id: 81e357077ac8d1f8f588fbb5324965b5
-    entity_id: fac93f9504dc8d1267bec7d02849d491
+    device_id: 25a822b76a0206496bd216235b034fb0
+    entity_id: 3321a33261062dab534569c3f6f53d69
    domain: sensor
    trigger: device
-    below: 150
+    below: 250
    for:
      hours: 0
      minutes: 5
@@ -1184,8 +1239,8 @@
  conditions:
  - condition: device
    type: is_on
-    device_id: 81e357077ac8d1f8f588fbb5324965b5
-    entity_id: 2a2659668772d9345e42667900832f0e
+    device_id: 25a822b76a0206496bd216235b034fb0
+    entity_id: 4748aace637a3f1d8b5e896236564024
    domain: switch
  - condition: state
    entity_id: input_boolean.waschetrockner_aktiv
@@ -1363,3 +1418,42 @@
      motion_cutoff: 10
      illuminance_low_threshold: 10
      battery_low_threshold: 20
+- id: '1772920063868'
+  alias: IKEA BILRESA Dual Button Küche Musik
+  description: ''
+  use_blueprint:
+    path: Skaronator/ikea-bilresa-dual-button.yaml
+    input:
+      button1_event:
+      - event.bilresa_dual_button_taste_1
+      button2_event:
+      - event.bilresa_dual_button_taste_2
+      button1_single:
+      - type: turn_on
+        device_id: 6d1be741876624a70ab5b01b54c6fd6f
+        entity_id: 621e4377a089b7f5d92c7c9f2cc171a1
+        domain: switch
+      button2_single:
+      - type: turn_off
+        device_id: 6d1be741876624a70ab5b01b54c6fd6f
+        entity_id: 621e4377a089b7f5d92c7c9f2cc171a1
+        domain: switch
+
+- id: epaper_daily_demotivational_quote
+  alias: Epaper tägliches Demotivationszitat
+  description: Wählt täglich ein festes Zitat aus der lokalen Zitatbibliothek aus.
+  triggers:
+    - trigger: homeassistant
+      event: start
+    - trigger: time
+      at: "00:00:00"
+  conditions: []
+  actions:
+    - action: input_select.select_option
+      target:
+        entity_id: input_select.epaper_demotivationszitat
+      data:
+        option: >-
+          {% set quotes = state_attr('input_select.epaper_demotivationszitat', 'options') %}
+          {{ quotes[(now().strftime('%j') | int - 1) % (quotes | count)] }}
+  mode: single
@@ -0,0 +1,302 @@
+mode: restart
+blueprint:
+  name: IKEA BILRESA Dual Button
+  author: Skaronator
+  description: "# IKEA BILRESA Dual Button Remote Automation\n\n## Current Version
+    2.0.1\n\n## Features\n\nSimple automation blueprint for IKEA BILRESA dual-button
+    remote.\n\n### Supported Actions for Each Button\n\n* Single Press\n* Double Press\n*
+    Long Press (on press and release)\n* While Holding (with configurable interval)\n\n###
+    Configuration Options\n\n* Configurable interval for \"while holding\" actions.\n*
+    Safety limit on maximum iterations for \"while holding\" actions to prevent infinite
+    loops.\n\n## Changelog\n\n### 2.0.1\n  - Removed Matter integration filter for
+    button event selector. This will allow users to use the Ikea BILRESA remote over
+    3rd party Matter integration.\n### 2.0.0\n  - Added support for selecting multiple
+    entities for each button. Allowing to have multiple remotes triggering the same
+    actions.\n  - See [these upgrade notes](https://community.home-assistant.io/t/ikea-bilresa-dual-button-remote/965815/28?u=skaronator)
+    for migrating existing automations using this blueprint.\n### 1.2.2\n  - Improved
+    descriptions and documentation.\n### 1.2.1\n  - Improved descriptions for blueprint
+    inputs.\n### 1.2.0\n  - Added max iterations setting for \"while holding\" actions
+    to prevent infinite loops.\n### 1.1.0\n  - Added \"while holding\" actions for
+    both buttons with configurable interval.\n### 1.0.0\n  - Initial release with
+    support for all button actions.\n\n## Support and Feedback\n\n* GitHub: [Skaronator/home-assistant-blueprints](https://github.com/Skaronator/home-assistant-blueprints)\n*
+    Blueprint Exchange: [IKEA BILRESA Dual Button](https://community.home-assistant.io/t/ikea-bilresa-dual-button-remote/965815)\n\nThank
+    you for using this blueprint! Your feedback and contributions are welcome. \U0001F49A\n"
+  domain: automation
+  source_url: https://raw.githubusercontent.com/Skaronator/home-assistant-blueprints/refs/heads/main/automation/ikea-bilresa-dual-button.yaml
+  homeassistant:
+    min_version: 2025.12.0
+  input:
+    setup:
+      name: ⚙️ Button Setup
+      description: 'Select the event entities for all 2 buttons on the IKEA BILRESA
+        dual-button remote.
+
+        '
+      collapsed: true
+      input:
+        button1_event:
+          name: Entity
+          description: 'Select the event entity for Button 1
+
+            '
+          selector:
+            entity:
+              multiple: true
+              filter:
+              - domain:
+                - event
+                device_class:
+                - button
+              reorder: false
+        button2_event:
+          name: Entity
+          description: 'Select the event entity for Button 2
+
+            '
+          selector:
+            entity:
+              multiple: true
+              filter:
+              - domain:
+                - event
+                device_class:
+                - button
+              reorder: false
+    button1:
+      name: '1️⃣ Button 1 Actions
+
+        '
+      description: 'Define actions when pressing Button 1.
+
+        '
+      collapsed: true
+      input:
+        button1_single:
+          name: Single Press
+          description: Action for Button 1 single press.
+          default: []
+          selector:
+            action: {}
+        button1_double:
+          name: Double Press
+          description: Action for Button 1 double press.
+          default: []
+          selector:
+            action: {}
+        button1_long_press:
+          name: Long Press (on press)
+          description: Action for Button 1 long press completion.
+          default: []
+          selector:
+            action: {}
+        button1_long_release:
+          name: Long Press (on release)
+          description: Action for Button 1 long press completion.
+          default: []
+          selector:
+            action: {}
+        button1_holding_interval:
+          name: Holding Interval (seconds)
+          description: Interval in seconds for repeating "while holding" actions.
+          default: 0.2
+          selector:
+            number:
+              min: 0.05
+              max: 2.0
+              step: 0.05
+              mode: slider
+        button1_holding_max_iterations:
+          name: Holding Max Iterations
+          description: Maximum number of iterations for "while holding" actions. This
+            is a safety limit to prevent infinite loops.
+          default: 100
+          selector:
+            number:
+              min: 1.0
+              max: 1000.0
+              step: 1.0
+              mode: slider
+        button1_while_holding:
+          name: While Holding
+          description: Action for Button 1 while holding. This action will be repeated
+            at the defined interval while the button is held down.
+          default: []
+          selector:
+            action: {}
+    button2:
+      name: '2️⃣ Button 2 Actions
+
+        '
+      description: 'Define actions when pressing Button 2.
+
+        '
+      collapsed: true
+      input:
+        button2_single:
+          name: Single Press
+          description: Action for Button 2 single press.
+          default: []
+          selector:
+            action: {}
+        button2_double:
+          name: Double Press
+          description: Action for Button 2 double press.
+          default: []
+          selector:
+            action: {}
+        button2_long_press:
+          name: Long Press (on press)
+          description: Action for Button 2 long press completion.
+          default: []
+          selector:
+            action: {}
+        button2_long_release:
+          name: Long Press (on release)
+          description: Action for Button 2 long press completion.
+          default: []
+          selector:
+            action: {}
+        button2_holding_interval:
+          name: Holding Interval (seconds)
+          description: Interval in seconds for repeating "while holding" actions.
+          default: 0.2
+          selector:
+            number:
+              min: 0.05
+              max: 2.0
+              step: 0.05
+              mode: slider
+        button2_holding_max_iterations:
+          name: Holding Max Iterations
+          description: Maximum number of iterations for "while holding" actions. This
+            is a safety limit to prevent infinite loops.
+          default: 100
+          selector:
+            number:
+              min: 1.0
+              max: 1000.0
+              step: 1.0
+              mode: slider
+        button2_while_holding:
+          name: While Holding
+          description: Action for Button 2 while holding. This action will be repeated
+            at the defined interval while the button is held down.
+          default: []
+          selector:
+            action: {}
+trigger:
+- platform: state
+  id: button1
+  entity_id: !input button1_event
+- platform: state
+  id: button2
+  entity_id: !input button2_event
+condition:
+- condition: template
+  value_template: '{{ trigger.from_state.state not in [''unknown'', ''unavailable'']
+    }}
+
+    '
+- condition: template
+  value_template: '{{ trigger.to_state.state not in [''unknown'', ''unavailable'']
+    }}
+
+    '
+- condition: template
+  value_template: '{{ trigger.from_state.state != trigger.to_state.state }}
+
+    '
+action:
+- variables:
+    trigger_id: '{{ trigger.id }}'
+    press_type: '{{ trigger.to_state.attributes.event_type }}'
+    button1_max_iterations: !input button1_holding_max_iterations
+    button2_max_iterations: !input button2_holding_max_iterations
+- parallel:
+  - repeat:
+      while:
+      - condition: template
+        value_template: '{{ press_type == ''long_press'' and trigger_id == ''button1''
+          and states(trigger.entity_id) == trigger.to_state.state }}
+
+          '
+      - condition: template
+        value_template: '{{ repeat.index|default(0) <= button1_max_iterations }}
+
+          '
+      sequence:
+      - sequence: !input button1_while_holding
+      - delay:
+          seconds: !input button1_holding_interval
+  - repeat:
+      while:
+      - condition: template
+        value_template: '{{ press_type == ''long_press'' and trigger_id == ''button2''
+          and states(trigger.entity_id) == trigger.to_state.state }}
+
+          '
+      - condition: template
+        value_template: '{{ repeat.index|default(0) <= button2_max_iterations }}
+
+          '
+      sequence:
+      - sequence: !input button2_while_holding
+      - delay:
+          seconds: !input button2_holding_interval
+  - choose:
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button1'' and press_type == ''multi_press_1''
+          }}
+
+          '
+      sequence: !input button1_single
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button1'' and press_type == ''multi_press_2''
+          }}
+
+          '
+      sequence: !input button1_double
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button1'' and press_type == ''long_press''
+          }}
+
+          '
+      sequence: !input button1_long_press
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button1'' and press_type == ''long_release''
+          }}
+
+          '
+      sequence: !input button1_long_release
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button2'' and press_type == ''multi_press_1''
+          }}
+
+          '
+      sequence: !input button2_single
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button2'' and press_type == ''multi_press_2''
+          }}
+
+          '
+      sequence: !input button2_double
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button2'' and press_type == ''long_press''
+          }}
+
+          '
+      sequence: !input button2_long_press
+    - conditions:
+      - condition: template
+        value_template: '{{ trigger_id == ''button2'' and press_type == ''long_release''
+          }}
+
+          '
+      sequence: !input button2_long_release
@@ -35,6 +35,12 @@ utility_meter: !include utility_meters.yaml
 mqtt: !include mqtt.yaml
 mqtt_statestream: !include mqtt_statestream.yaml

+# Calendar data is normalised in a sandboxed script before ESPHome receives it.
+python_script:
+
+# Home Assistant-managed e-paper quote library
+input_select: !include input_select.yaml
+
 # Template sensors
 template: !include template.yaml

@@ -82,3 +88,8 @@ generic_hygrostat:

 frontend:
  themes: !include_dir_merge_named themes
+
+freedns:
+  url: !secret freedns6_url
+#  - name: IPv4
+#    url: !secret freedns4_url
@@ -38,10 +38,13 @@ ota:
  platform: esphome
  password: !secret ota

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: atorch-dc-load.home  
+  #use_address: atorch-dc-load.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -0,0 +1,293 @@
+substitutions:
+  name: "owon-b35t"
+  friendly_name: "OWON B35T Multimeter"
+  device_description: "M5Stack Core 1 BLE client for OWON B35T/B35T+ multimeter with local graphical display"
+  owon_mac_address: !secret owon_b35t_mac_address
+
+esphome:
+  name: ${name}
+  friendly_name: ${friendly_name}
+  comment: ${device_description}
+  min_version: 2024.6.0
+  includes:
+    - owon_b35t-m5stack-core1.h
+  project:
+    name: "custom.owon-b35t-m5stack"
+    version: "1.0"
+
+esp32:
+  board: m5stack-core-esp32
+  framework:
+    type: esp-idf
+    advanced:
+      minimum_chip_revision: "3.1"
+
+logger:
+  level: INFO
+
+api:
+  encryption:
+    key: !secret apikey
+
+ota:
+  platform: esphome
+  password: !secret ota
+
+wifi:
+  ssid: "Voltage-legacy"
+  password: !secret voltage_legacy_psk
+  #use_address: ${name}.home
+  power_save_mode: none
+  fast_connect: on
+  min_auth_mode: WPA2
+  ap:
+    ssid: "OWON B35T Fallback Hotspot"
+    password: !secret fallback_psk
+
+# Disabled to save RAM on the M5Stack Core 1. Re-enable temporarily if Wi-Fi recovery is needed.
+# captive_portal:
+
+interval:
+  - interval: 10s
+    then:
+      - lambda: |-
+          ESP_LOGI("mem", "heap free=%u min_free=%u internal_free=%u internal_largest=%u dma_free=%u dma_largest=%u",
+                   static_cast<unsigned>(esp_get_free_heap_size()),
+                   static_cast<unsigned>(esp_get_minimum_free_heap_size()),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_INTERNAL)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL)),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_DMA)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_DMA)));
+
+esp32_ble_tracker:
+  scan_parameters:
+    active: true
+    continuous: true
+
+ble_client:
+  - mac_address: ${owon_mac_address}
+    id: owon_ble_client
+    on_connect:
+      then:
+        - lambda: |-
+            owon_meter.on_connect();
+    on_disconnect:
+      then:
+        - lambda: |-
+            owon_meter.on_disconnect();
+        - logger.log:
+            level: WARN
+            format: "OWON BLE meter disconnected; restarting M5Stack to reclaim heap"
+        - delay: 1s
+        - lambda: |-
+            esp_restart();
+
+spi:
+  clk_pin: GPIO18
+  mosi_pin: GPIO23
+  miso_pin: GPIO19
+
+output:
+  - platform: ledc
+    pin: GPIO32
+    id: lcd_backlight
+
+light:
+  - platform: monochromatic
+    output: lcd_backlight
+    name: "${friendly_name} Backlight"
+    id: backlight
+    restore_mode: ALWAYS_ON
+
+font:
+  - file: "fonts/Roboto-Regular.ttf"
+    id: meter_font
+    size: 15
+    glyphs:
+      [
+        " ",
+        "!",
+        "%",
+        "+",
+        "-",
+        ".",
+        "/",
+        "0",
+        "1",
+        "2",
+        "3",
+        "4",
+        "5",
+        "6",
+        "7",
+        "8",
+        "9",
+        "<",
+        ">",
+        "A",
+        "B",
+        "C",
+        "D",
+        "E",
+        "F",
+        "G",
+        "H",
+        "I",
+        "L",
+        "M",
+        "N",
+        "O",
+        "P",
+        "R",
+        "S",
+        "T",
+        "U",
+        "V",
+        "W",
+        "X",
+        "Y",
+        "Z",
+        "a",
+        "c",
+        "d",
+        "e",
+        "f",
+        "g",
+        "h",
+        "i",
+        "k",
+        "m",
+        "n",
+        "o",
+        "r",
+        "s",
+        "t",
+        "u",
+        "v",
+        "w",
+        "y",
+        "z",
+        "°",
+        "µ",
+        "Ω",
+      ]
+
+display:
+  - platform: ili9xxx
+    id: lcd
+    model: M5STACK
+    cs_pin: GPIO14
+    dc_pin: GPIO27
+    reset_pin: GPIO33
+    invert_colors: true
+    color_palette: 8BIT
+    rotation: 0
+    update_interval: 500ms
+    lambda: |-
+      owon_meter.render(it, id(meter_font));
+
+binary_sensor:
+  - platform: gpio
+    id: button_a
+    pin:
+      number: GPIO39
+      inverted: true
+    internal: true
+    on_press:
+      then:
+        - lambda: |-
+            owon_meter.previous_button();
+  - platform: gpio
+    id: button_b
+    pin:
+      number: GPIO38
+      inverted: true
+    internal: true
+    on_click:
+      - min_length: 50ms
+        max_length: 1500ms
+        then:
+          - logger.log:
+              level: INFO
+              format: "OWON short press: %s"
+              args: ["owon_meter.selected_button_name()"]
+          - ble_client.ble_write:
+              id: owon_ble_client
+              service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+              characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+              value: !lambda |-
+                std::vector<uint8_t> data = {owon_meter.selected_button, 0x01};
+                return data;
+      - min_length: 1500ms
+        max_length: 5000ms
+        then:
+          - logger.log:
+              level: INFO
+              format: "OWON long press: %s"
+              args: ["owon_meter.selected_button_name()"]
+          - ble_client.ble_write:
+              id: owon_ble_client
+              service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+              characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+              value: !lambda |-
+                uint8_t press_type = (owon_meter.selected_button == 1 || owon_meter.selected_button == 5) ? 0x01 : 0x00;
+                std::vector<uint8_t> data = {owon_meter.selected_button, press_type};
+                return data;
+  - platform: gpio
+    id: button_c
+    pin:
+      number: GPIO37
+      inverted: true
+    internal: true
+    on_press:
+      then:
+        - lambda: |-
+            owon_meter.next_button();
+
+  - platform: template
+    name: "${friendly_name} Connected"
+    lambda: |-
+      return owon_meter.connected;
+  - platform: template
+    name: "${friendly_name} Overload"
+    lambda: |-
+      return owon_meter.overload;
+  - platform: template
+    name: "${friendly_name} Low Battery"
+    lambda: |-
+      return owon_meter.low_battery;
+
+sensor:
+  - platform: ble_client
+    type: characteristic
+    ble_client_id: owon_ble_client
+    id: owon_notify_source
+    internal: true
+    service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+    characteristic_uuid: "0000fff4-0000-1000-8000-00805f9b34fb"
+    notify: true
+    update_interval: never
+    lambda: |-
+      owon_meter.handle_notify(x);
+      return owon_meter.value();
+
+  - platform: wifi_signal
+    name: "${friendly_name} WiFi Signal"
+    update_interval: 60s
+
+text_sensor:
+  - platform: template
+    name: "${friendly_name} Reading"
+    update_interval: 2s
+    lambda: |-
+      return owon_meter.reading_text();
+  - platform: template
+    name: "${friendly_name} Unit"
+    update_interval: 2s
+    lambda: |-
+      return std::string(owon_meter.scale()) + owon_meter.unit();
+  - platform: template
+    name: "${friendly_name} Mode"
+    update_interval: 2s
+    lambda: |-
+      return owon_meter.mode_text();
@@ -0,0 +1,658 @@
+/*
+ * ESPHome helper for OWON B35T/B35T+ BLE meter on M5Stack Core 1.
+ * Parser is based on the standalone Arduino sketch by Reaper7
+ * (Beerware license, Revision 42) and Dean Cording's owonb35 notes.
+ */
+#pragma once
+
+#include <cmath>
+#include <cstdint>
+#include <cstring>
+#include <string>
+#include <vector>
+#include "esp_heap_caps.h"
+#include "esp_system.h"
+#include "esphome/core/helpers.h"
+#include "esphome/components/i2c/i2c.h"
+#include "esphome/core/log.h"
+#include "esphome/components/display/display.h"
+
+namespace owon_b35t {
+
+using esphome::Color;
+using esphome::display::Display;
+
+static const char *const TAG = "owon_b35t";
+static const char *const POWER_TAG = "core2_power";
+static constexpr uint8_t AXP192_ADDR = 0x34;
+static esphome::i2c::I2CDevice axp192;
+static bool axp192_ready = false;
+
+static bool axp_write(uint8_t reg, uint8_t value) {
+  if (!axp192_ready) return false;
+  bool ok = axp192.write_byte(reg, value);
+  if (!ok) ESP_LOGW(POWER_TAG, "AXP192 write reg 0x%02X failed", reg);
+  return ok;
+}
+
+static bool axp_read(uint8_t reg, uint8_t *value) {
+  if (!axp192_ready) return false;
+  bool ok = axp192.read_byte(reg, value);
+  if (!ok) ESP_LOGW(POWER_TAG, "AXP192 read reg 0x%02X failed", reg);
+  return ok;
+}
+
+static void axp_update(uint8_t reg, uint8_t clear_mask, uint8_t set_mask) {
+  uint8_t value = 0;
+  if (!axp_read(reg, &value)) return;
+  value = (value & ~clear_mask) | set_mask;
+  axp_write(reg, value);
+}
+
+static uint8_t axp_dc_voltage_data(uint16_t millivolts) {
+  if (millivolts < 700) millivolts = 700;
+  if (millivolts > 3500) millivolts = 3500;
+  return static_cast<uint8_t>((millivolts - 700) / 25) & 0x7F;
+}
+
+static uint8_t axp_ldo_voltage_data(uint16_t millivolts) {
+  if (millivolts < 1800) millivolts = 1800;
+  if (millivolts > 3300) millivolts = 3300;
+  return static_cast<uint8_t>((millivolts - 1800) / 100) & 0x0F;
+}
+
+static void core2_axp192_set_lcd_voltage(uint16_t millivolts) {
+  uint8_t value = 0;
+  axp_read(0x27, &value);
+  axp_write(0x27, (value & 0x80) | axp_dc_voltage_data(millivolts));  // DCDC3, LCD backlight
+}
+
+static void core2_axp192_set_backlight(float brightness) {
+  if (brightness <= 0.0f) {
+    axp_update(0x12, 0x02, 0x00);  // DCDC3 off
+    return;
+  }
+  if (brightness > 1.0f) brightness = 1.0f;
+  uint16_t millivolts = static_cast<uint16_t>(2400 + brightness * 900);
+  core2_axp192_set_lcd_voltage(millivolts);
+  axp_update(0x12, 0x00, 0x02);  // DCDC3 on
+}
+
+static void core2_axp192_init(esphome::i2c::I2CBus *bus) {
+  axp192.set_i2c_bus(bus);
+  axp192.set_i2c_address(AXP192_ADDR);
+  axp192_ready = true;
+  ESP_LOGI(POWER_TAG, "Initializing M5Stack Core2 AXP192 LCD power");
+  axp_update(0x30, 0xF9, 0x02);  // Disable VBUS current limit, preserve bit 2.
+  axp_update(0x92, 0x07, 0x00);  // GPIO1 open-drain output.
+  axp_update(0x93, 0x07, 0x00);  // GPIO2 open-drain output.
+  axp_write(0x35, 0xA2);         // RTC battery charging.
+
+  uint8_t value = 0;
+  axp_read(0x26, &value);
+  axp_write(0x26, (value & 0x80) | axp_dc_voltage_data(3350));  // DCDC1 ESP32 VDD.
+  core2_axp192_set_lcd_voltage(2800);
+
+  uint8_t ldo2 = axp_ldo_voltage_data(3300);
+  uint8_t ldo3 = axp_ldo_voltage_data(2000);
+  axp_write(0x28, (ldo2 << 4) | ldo3);  // LDO2 LCD logic/SD, LDO3 vibrator.
+  axp_update(0x12, 0x00, 0x07);         // Enable DCDC1, DCDC3, LDO2.
+  axp_write(0x82, 0xFF);                // ADCs on.
+  axp_update(0x95, 0x8D, 0x84);         // GPIO4 setup, as M5Core2 library does.
+  axp_write(0x36, 0x4C);                // Power key timing.
+
+  // LCD reset through AXP192 GPIO4.
+  axp_update(0x96, 0x02, 0x00);
+  delay(100);
+  axp_update(0x96, 0x00, 0x02);
+  delay(100);
+
+  core2_axp192_set_backlight(1.0f);
+}
+
+static const uint8_t ACCU_BMP[32] = {
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b11111111, 0b11111110,
+    0b10000000, 0b00000010,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000010,
+    0b11111111, 0b11111110,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+};
+
+static const uint8_t BLE_BMP[32] = {
+    0b00000001, 0b10000000,
+    0b00000001, 0b11000000,
+    0b00010001, 0b01100000,
+    0b00011001, 0b00110000,
+    0b00001101, 0b00011000,
+    0b00000111, 0b00110000,
+    0b00000011, 0b01100000,
+    0b00000001, 0b11000000,
+    0b00000001, 0b11000000,
+    0b00000011, 0b01100000,
+    0b00000111, 0b00110000,
+    0b00001101, 0b00011000,
+    0b00011001, 0b00110000,
+    0b00010001, 0b01100000,
+    0b00000001, 0b11000000,
+    0b00000001, 0b10000000,
+};
+
+static const uint8_t DIODE_BMP[32] = {
+    0b00001000, 0b00011000,
+    0b00001100, 0b00011000,
+    0b00001110, 0b00011000,
+    0b00001111, 0b00011000,
+    0b00001111, 0b10011000,
+    0b00001111, 0b11011000,
+    0b00001111, 0b11111000,
+    0b11111111, 0b11111111,
+    0b11111111, 0b11111111,
+    0b00001111, 0b11111000,
+    0b00001111, 0b11011000,
+    0b00001111, 0b10011000,
+    0b00001111, 0b00011000,
+    0b00001110, 0b00011000,
+    0b00001100, 0b00011000,
+    0b00001000, 0b00011000,
+};
+
+static const uint8_t BUZZ_BMP[32] = {
+    0b00000000, 0b11000000,
+    0b00000001, 0b11000000,
+    0b00000011, 0b11000001,
+    0b00000111, 0b11000001,
+    0b00001111, 0b11000101,
+    0b11111111, 0b11000101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11000101,
+    0b00001111, 0b11000101,
+    0b00000111, 0b11000001,
+    0b00000011, 0b11000001,
+    0b00000001, 0b11000000,
+    0b00000000, 0b11000000,
+};
+
+class Meter {
+ public:
+  static constexpr uint8_t REGPLUSMINUS = 0x00;
+  static constexpr uint8_t FLAGPLUS = 0b00101011;
+  static constexpr uint8_t FLAGMINUS = 0b00101101;
+  static constexpr uint8_t REGDIG1 = 0x01;
+  static constexpr uint8_t REGDIG2 = 0x02;
+  static constexpr uint8_t REGDIG3 = 0x03;
+  static constexpr uint8_t REGDIG4 = 0x04;
+  static constexpr uint8_t REGPOINT = 0x06;
+  static constexpr uint8_t FLAGPOINT0 = 0b00110000;
+  static constexpr uint8_t FLAGPOINT1 = 0b00110001;
+  static constexpr uint8_t FLAGPOINT2 = 0b00110010;
+  static constexpr uint8_t FLAGPOINT3 = 0b00110100;
+  static constexpr uint8_t REGMODE = 0x07;
+  static constexpr uint8_t FLAGMODEHOLD = 0b00000010;
+  static constexpr uint8_t FLAGMODEREL = 0b00000100;
+  static constexpr uint8_t FLAGMODEAC = 0b00001000;
+  static constexpr uint8_t FLAGMODEDC = 0b00010000;
+  static constexpr uint8_t FLAGMODEAUTO = 0b00100000;
+  static constexpr uint8_t REGMINMAX = 0x08;
+  static constexpr uint8_t FLAGMIN = 0b00010000;
+  static constexpr uint8_t FLAGMAX = 0b00100000;
+  static constexpr uint8_t REGSCALE = 0x09;
+  static constexpr uint8_t FLAGSCALEDUTY = 0b00000010;
+  static constexpr uint8_t FLAGSCALEDIODE = 0b00000100;
+  static constexpr uint8_t FLAGSCALEBUZZ = 0b00001000;
+  static constexpr uint8_t FLAGSCALEMEGA = 0b00010000;
+  static constexpr uint8_t FLAGSCALEKILO = 0b00100000;
+  static constexpr uint8_t FLAGSCALEMILLI = 0b01000000;
+  static constexpr uint8_t FLAGSCALEMICRO = 0b10000000;
+  static constexpr uint8_t REGUNIT = 0x0a;
+  static constexpr uint8_t FLAGUNITFAHR = 0b00000001;
+  static constexpr uint8_t FLAGUNITGRAD = 0b00000010;
+  static constexpr uint8_t FLAGUNITNF = 0b00000100;
+  static constexpr uint8_t FLAGUNITHZ = 0b00001000;
+  static constexpr uint8_t FLAGUNITHFE = 0b00010000;
+  static constexpr uint8_t FLAGUNITOHM = 0b00100000;
+  static constexpr uint8_t FLAGUNITAMP = 0b01000000;
+  static constexpr uint8_t FLAGUNITVOLT = 0b10000000;
+
+  bool connected{false};
+  bool write_available{false};
+  bool is_plus{false};
+  bool low_battery{false};
+  bool overload{false};
+  bool has_reading{false};
+  uint8_t selected_button{1};
+  uint32_t last_notify_ms{0};
+
+  bool handle_notify(const std::vector<uint8_t> &data) {
+    if (data.size() > sizeof(this->raw_))
+      return false;
+    if (data.size() == 6 && data[1] >= 0xF0) {
+      memset(this->raw_, 0, sizeof(this->raw_));
+      memcpy(this->raw_, data.data(), data.size());
+      this->is_plus = true;
+      this->parse_plus_();
+    } else if (data.size() == 14 && data[12] == 0x0D && data[13] == 0x0A) {
+      memset(this->value_, 0, sizeof(this->value_));
+      memcpy(this->value_, data.data(), data.size());
+      this->is_plus = false;
+    } else {
+      ESP_LOGW(TAG, "Ignoring unexpected OWON frame length=%u", static_cast<unsigned>(data.size()));
+      return false;
+    }
+
+    this->overload = memcmp(this->value_, OVERLOAD_FRAME, sizeof(OVERLOAD_FRAME)) == 0;
+    this->display_value = this->calc_display_value_();
+    this->base_value = this->calc_base_value_();
+    this->has_reading = true;
+    this->last_notify_ms = millis();
+    return true;
+  }
+
+  void on_connect() {
+    this->connected = true;
+    this->write_available = true;
+  }
+
+  void on_disconnect() {
+    this->connected = false;
+    this->write_available = false;
+  }
+
+  float value() const { return this->display_value; }
+  float value_base() const { return this->base_value; }
+  bool negative() const { return (this->value_[REGPLUSMINUS] & FLAGMINUS) == FLAGMINUS; }
+  bool auto_range() const { return (this->value_[REGMODE] & FLAGMODEAUTO) == FLAGMODEAUTO; }
+  bool hold() const { return (this->value_[REGMODE] & FLAGMODEHOLD) == FLAGMODEHOLD; }
+  bool relative() const { return (this->value_[REGMODE] & FLAGMODEREL) == FLAGMODEREL; }
+  bool ac() const { return (this->value_[REGMODE] & FLAGMODEAC) == FLAGMODEAC; }
+  bool dc() const { return (this->value_[REGMODE] & FLAGMODEDC) == FLAGMODEDC; }
+  bool min_mode() const { return (this->value_[REGMINMAX] & FLAGMIN) == FLAGMIN; }
+  bool max_mode() const { return (this->value_[REGMINMAX] & FLAGMAX) == FLAGMAX; }
+  bool diode() const { return (this->value_[REGSCALE] & FLAGSCALEDIODE) == FLAGSCALEDIODE; }
+  bool continuity() const { return (this->value_[REGSCALE] & FLAGSCALEBUZZ) == FLAGSCALEBUZZ; }
+
+  const char *unit() const {
+    switch (this->value_[REGUNIT]) {
+      case FLAGUNITFAHR: return "°F";
+      case FLAGUNITGRAD: return "°C";
+      case FLAGUNITNF: return "nF";
+      case FLAGUNITHZ: return "Hz";
+      case FLAGUNITHFE: return "hFE";
+      case FLAGUNITOHM: return "Ω";
+      case FLAGUNITAMP: return "A";
+      case FLAGUNITVOLT: return "V";
+      default: return "";
+    }
+  }
+
+  const char *scale() const {
+    if ((this->value_[REGSCALE] & FLAGSCALEDUTY) == FLAGSCALEDUTY) return "%";
+    if ((this->value_[REGSCALE] & FLAGSCALEMEGA) == FLAGSCALEMEGA) return "M";
+    if ((this->value_[REGSCALE] & FLAGSCALEKILO) == FLAGSCALEKILO) return "k";
+    if ((this->value_[REGSCALE] & FLAGSCALEMILLI) == FLAGSCALEMILLI) return "m";
+    if ((this->value_[REGSCALE] & FLAGSCALEMICRO) == FLAGSCALEMICRO) return "µ";
+    return "";
+  }
+
+  std::string mode_text() const {
+    std::string out;
+    if (this->dc()) out += "DC ";
+    if (this->ac()) out += "AC ";
+    if (this->auto_range()) out += "AUTO ";
+    if (this->hold()) out += "HOLD ";
+    if (this->relative()) out += "REL ";
+    if (this->min_mode()) out += "MIN ";
+    if (this->max_mode()) out += "MAX ";
+    if (this->diode()) out += "DIODE ";
+    if (this->continuity()) out += "CONT ";
+    if (!out.empty()) out.pop_back();
+    return out;
+  }
+
+  std::string reading_text() const {
+    if (!this->connected) return "Disconnected";
+    if (!this->has_reading) return "Waiting for data";
+    if (this->overload) return "OL " + std::string(this->scale()) + this->unit();
+    char buf[48];
+    snprintf(buf, sizeof(buf), "%s%.4g %s%s", this->negative() ? "-" : "", std::fabs(this->display_value), this->scale(), this->unit());
+    return std::string(buf);
+  }
+
+  enum Kind { KIND_OTHER, KIND_VOLTAGE, KIND_CURRENT, KIND_RESISTANCE, KIND_FREQUENCY, KIND_CAPACITANCE, KIND_TEMP_C, KIND_TEMP_F, KIND_DUTY };
+  Kind kind() const {
+    if ((this->value_[REGSCALE] & FLAGSCALEDUTY) == FLAGSCALEDUTY) return KIND_DUTY;
+    switch (this->value_[REGUNIT]) {
+      case FLAGUNITVOLT: return KIND_VOLTAGE;
+      case FLAGUNITAMP: return KIND_CURRENT;
+      case FLAGUNITOHM: return KIND_RESISTANCE;
+      case FLAGUNITHZ: return KIND_FREQUENCY;
+      case FLAGUNITNF: return KIND_CAPACITANCE;
+      case FLAGUNITGRAD: return KIND_TEMP_C;
+      case FLAGUNITFAHR: return KIND_TEMP_F;
+      default: return KIND_OTHER;
+    }
+  }
+
+  const char *selected_button_name() const {
+    static const char *const names[] = {"SELECT", "RANGE", "HLD/LIG", "REL/BT", "HZ/DUTY", "MAX/MIN"};
+    uint8_t index = this->selected_button;
+    if (index < 1) index = 1;
+    if (index > 6) index = 6;
+    return names[index - 1];
+  }
+
+  void previous_button() {
+    if (this->selected_button > 1) this->selected_button--;
+  }
+  void next_button() {
+    if (this->selected_button < 6) this->selected_button++;
+  }
+
+  void render(Display &it, esphome::display::BaseFont *font) {
+    const Color bg(0, 0, 0);
+    const Color fg(210, 210, 210);
+    // Chosen to map to a neutral dark gray in the RGB332 8-bit display palette.
+    const Color inactive(80, 80, 80);
+    const Color yellow(255, 220, 0);
+    const Color blue(0, 80, 255);
+    const Color cyan(0, 255, 255);
+    const Color magenta(255, 0, 255);
+    const Color red(255, 0, 0);
+    const Color green(0, 220, 0);
+    const Color orange(255, 165, 0);
+
+    it.fill(bg);
+    bool status_active = this->connected && this->has_reading;
+    this->draw_icon_(it, 12, 8, 16, 16, ACCU_BMP, status_active ? (this->low_battery ? red : green) : inactive);
+    this->draw_icon_(it, 46, 8, 16, 16, BLE_BMP, this->connected ? blue : inactive);
+    this->label_(it, font, 86, 8, "AUTO", status_active && this->auto_range() ? fg : inactive);
+    this->label_(it, font, 138, 8, "MAX", status_active && this->max_mode() ? red : inactive);
+    this->label_(it, font, 178, 8, "MIN", status_active && this->min_mode() ? green : inactive);
+    this->label_(it, font, 218, 8, "HOLD", status_active && this->hold() ? blue : inactive);
+    this->label_(it, font, 270, 8, "REL", status_active && this->relative() ? Color(128, 128, 0) : inactive);
+
+    this->label_(it, font, 8, 66, "DC", status_active && this->dc() ? cyan : inactive);
+    this->label_(it, font, 8, 102, "AC", status_active && this->ac() ? magenta : inactive);
+
+    if (!this->connected) {
+      this->draw_digits_(it, "----", false, inactive);
+      it.print(160, 148, font, inactive, esphome::display::TextAlign::CENTER, "scan/connect");
+    } else if (!this->has_reading) {
+      this->draw_digits_(it, "8888", false, inactive);
+      it.print(160, 148, font, inactive, esphome::display::TextAlign::CENTER, "waiting");
+    } else if (this->overload) {
+      this->draw_digits_(it, " OL ", false, fg);
+    } else {
+      char d[5];
+      d[0] = this->digit_char_(REGDIG1);
+      d[1] = this->digit_char_(REGDIG2);
+      d[2] = this->digit_char_(REGDIG3);
+      d[3] = this->digit_char_(REGDIG4);
+      d[4] = 0;
+      this->draw_digits_(it, d, this->negative(), fg);
+      this->draw_decimal_points_(it, fg);
+    }
+
+    if (status_active) {
+      std::string unit_line = std::string(this->scale()) + this->unit();
+      it.print(270, 140, font, yellow, esphome::display::TextAlign::CENTER, unit_line.c_str());
+    }
+
+    bool bargraph_active = status_active && !this->overload;
+    this->draw_bargraph_(it, bargraph_active ? this->digits_from_buffer_() : 0, bargraph_active);
+    this->draw_icon_(it, 300, 148, 16, 16, DIODE_BMP, status_active && this->diode() ? magenta : inactive);
+    this->draw_icon_(it, 300, 174, 16, 16, BUZZ_BMP, status_active && this->continuity() ? orange : inactive);
+
+    it.filled_rectangle(34, 212, 40, 24, this->write_available ? fg : inactive);
+    it.filled_rectangle(108, 212, 100, 24, this->write_available ? fg : inactive);
+    it.filled_rectangle(242, 212, 40, 24, this->write_available ? fg : inactive);
+    it.print(54, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, "<");
+    it.print(158, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, this->selected_button_name());
+    it.print(262, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, ">");
+  }
+
+ private:
+  uint8_t raw_[14]{};
+  uint8_t value_[14]{};
+  float display_value{NAN};
+  float base_value{NAN};
+  static constexpr uint8_t OVERLOAD_FRAME[5] = {0x2B, 0x3F, 0x30, 0x3A, 0x3F};
+
+  uint16_t digits_from_buffer_() const {
+    uint16_t out = 0;
+    if (this->value_[REGDIG1] >= '0' && this->value_[REGDIG1] <= '9') out += (this->value_[REGDIG1] - '0') * 1000;
+    if (this->value_[REGDIG2] >= '0' && this->value_[REGDIG2] <= '9') out += (this->value_[REGDIG2] - '0') * 100;
+    if (this->value_[REGDIG3] >= '0' && this->value_[REGDIG3] <= '9') out += (this->value_[REGDIG3] - '0') * 10;
+    if (this->value_[REGDIG4] >= '0' && this->value_[REGDIG4] <= '9') out += (this->value_[REGDIG4] - '0');
+    return out;
+  }
+
+  float calc_display_value_() const {
+    if (this->overload) return NAN;
+
+    if (this->is_plus) {
+      uint16_t pair1 = static_cast<uint16_t>(this->raw_[0]) | (static_cast<uint16_t>(this->raw_[1]) << 8);
+      uint8_t decimal = pair1 & 0x07;
+      if (decimal >= 7) return NAN;
+
+      uint16_t pair3 = static_cast<uint16_t>(this->raw_[4]) | (static_cast<uint16_t>(this->raw_[5]) << 8);
+      bool negative = pair3 >= 0x7FFF;
+      uint16_t digits = negative ? (pair3 & 0x7FFF) : pair3;
+      float v = static_cast<float>(digits) / std::pow(10.0f, decimal);
+      return negative ? -v : v;
+    }
+
+    uint8_t decimal = 0;
+    switch (this->value_[REGPOINT] & 0x07) {
+      case 0b001: decimal = 1; break;
+      case 0b010: decimal = 2; break;
+      case 0b100: decimal = 3; break;
+      default: break;
+    }
+    float v = static_cast<float>(this->digits_from_buffer_()) / std::pow(10.0f, decimal);
+    return this->negative() ? -v : v;
+  }
+
+  float calc_base_value_() const {
+    if (std::isnan(this->display_value)) return NAN;
+    if (this->value_[REGUNIT] == FLAGUNITNF) return this->display_value * 1e-9f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMEGA) == FLAGSCALEMEGA) return this->display_value * 1e6f;
+    if ((this->value_[REGSCALE] & FLAGSCALEKILO) == FLAGSCALEKILO) return this->display_value * 1e3f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMILLI) == FLAGSCALEMILLI) return this->display_value * 1e-3f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMICRO) == FLAGSCALEMICRO) return this->display_value * 1e-6f;
+    return this->display_value;
+  }
+
+  void parse_plus_() {
+    memset(this->value_, 0, sizeof(this->value_));
+    this->value_[5] = 0x20;
+    this->value_[12] = 0x0D;
+    this->value_[13] = 0x0A;
+
+    uint16_t pair1 = static_cast<uint16_t>(this->raw_[0]) | (static_cast<uint16_t>(this->raw_[1]) << 8);
+    uint8_t function = (pair1 >> 6) & 0x0F;
+    uint8_t scale = (pair1 >> 3) & 0x07;
+    uint8_t decimal = pair1 & 0x07;
+
+    switch (decimal) {
+      case 0: this->value_[REGPOINT] = FLAGPOINT0; break;
+      case 1: this->value_[REGPOINT] = FLAGPOINT3; break;
+      case 2: this->value_[REGPOINT] = FLAGPOINT2; break;
+      case 3: this->value_[REGPOINT] = FLAGPOINT1; break;
+      default: break;
+    }
+
+    switch (function) {
+      case 0: this->value_[REGUNIT] |= FLAGUNITVOLT; this->value_[REGMODE] |= FLAGMODEDC; break;
+      case 1: this->value_[REGUNIT] |= FLAGUNITVOLT; this->value_[REGMODE] |= FLAGMODEAC; break;
+      case 2: this->value_[REGUNIT] |= FLAGUNITAMP; this->value_[REGMODE] |= FLAGMODEDC; break;
+      case 3: this->value_[REGUNIT] |= FLAGUNITAMP; this->value_[REGMODE] |= FLAGMODEAC; break;
+      case 4: this->value_[REGUNIT] |= FLAGUNITOHM; break;
+      case 5: this->value_[REGUNIT] |= FLAGUNITNF; break;
+      case 6: this->value_[REGUNIT] |= FLAGUNITHZ; break;
+      case 7: this->value_[REGSCALE] |= FLAGSCALEDUTY; break;
+      case 8: this->value_[REGUNIT] |= FLAGUNITGRAD; break;
+      case 9: this->value_[REGUNIT] |= FLAGUNITFAHR; break;
+      case 10: this->value_[REGSCALE] |= FLAGSCALEDIODE; break;
+      case 11: this->value_[REGSCALE] |= FLAGSCALEBUZZ; break;
+      case 12: this->value_[REGUNIT] |= FLAGUNITHFE; break;
+      default: break;
+    }
+
+    switch (scale) {
+      case 2: this->value_[REGSCALE] |= FLAGSCALEMICRO; break;
+      case 3: this->value_[REGSCALE] |= FLAGSCALEMILLI; break;
+      case 5: this->value_[REGSCALE] |= FLAGSCALEKILO; break;
+      case 6: this->value_[REGSCALE] |= FLAGSCALEMEGA; break;
+      default: break;
+    }
+
+    uint16_t pair2 = static_cast<uint16_t>(this->raw_[2]) | (static_cast<uint16_t>(this->raw_[3]) << 8);
+    if (pair2 & (1 << 0)) this->value_[REGMODE] |= FLAGMODEHOLD;
+    if (pair2 & (1 << 1)) this->value_[REGMODE] |= FLAGMODEREL;
+    if (pair2 & (1 << 2)) this->value_[REGMODE] |= FLAGMODEAUTO;
+    this->low_battery = (pair2 & (1 << 3)) != 0;
+    if (pair2 & (1 << 4)) this->value_[REGMINMAX] |= FLAGMIN;
+    if (pair2 & (1 << 5)) this->value_[REGMINMAX] |= FLAGMAX;
+
+    uint16_t pair3 = static_cast<uint16_t>(this->raw_[4]) | (static_cast<uint16_t>(this->raw_[5]) << 8);
+    if (decimal < 7) {
+      uint16_t digits = pair3;
+      if (pair3 < 0x7FFF) {
+        this->value_[REGPLUSMINUS] = FLAGPLUS;
+      } else {
+        this->value_[REGPLUSMINUS] = FLAGMINUS;
+        digits = pair3 & 0x7FFF;
+      }
+      this->value_[REGDIG1] = '0' + ((digits / 1000) % 10);
+      this->value_[REGDIG2] = '0' + ((digits / 100) % 10);
+      this->value_[REGDIG3] = '0' + ((digits / 10) % 10);
+      this->value_[REGDIG4] = '0' + (digits % 10);
+    } else {
+      memcpy(this->value_, OVERLOAD_FRAME, sizeof(OVERLOAD_FRAME));
+    }
+  }
+
+  char digit_char_(uint8_t reg) const {
+    uint8_t c = this->value_[reg];
+    return (c >= '0' && c <= '9') ? static_cast<char>(c) : ' ';
+  }
+
+  void label_(Display &it, esphome::display::BaseFont *font, int x, int y, const char *text, Color color) {
+    it.print(x, y, font, color, esphome::display::TextAlign::TOP_LEFT, text);
+  }
+
+  void draw_digits_(Display &it, const char *text, bool negative, Color color) {
+    if (negative) this->draw_segment_(it, 8, 88, 26, 9, true, color);
+    constexpr int digit_x = 40;
+    constexpr int digit_y = 35;
+    constexpr int digit_w = 50;
+    constexpr int digit_h = 88;
+    constexpr int digit_distance = 64;
+    for (int i = 0; i < 4; i++) {
+      this->draw_seven_segment_(it, digit_x + i * digit_distance, digit_y, digit_w, digit_h, text[i], color);
+    }
+  }
+
+  void draw_decimal_points_(Display &it, Color color) {
+    uint8_t p = this->value_[REGPOINT];
+    if ((p & FLAGPOINT1) == FLAGPOINT1) it.filled_rectangle(95, 117, 8, 10, color);
+    if ((p & FLAGPOINT2) == FLAGPOINT2) it.filled_rectangle(159, 117, 8, 10, color);
+    if ((p & FLAGPOINT3) == FLAGPOINT3) it.filled_rectangle(223, 117, 8, 10, color);
+  }
+
+  void draw_segment_(Display &it, int x, int y, int w, int h, bool horizontal, Color color) {
+    if (horizontal) {
+      int cap = h / 2;
+      it.filled_rectangle(x + cap, y, w - 2 * cap, h +1, color);
+      it.filled_triangle(x, y + cap, x + cap, y, x + cap, y + h, color);
+      it.filled_triangle(x + w, y + cap, x + w - cap, y, x + w - cap, y + h, color);
+    } else {
+      int cap = w / 2;
+      it.filled_rectangle(x, y + cap, w +1, h - 2 * cap, color);
+      it.filled_triangle(x + cap, y, x, y + cap, x + w, y + cap, color);
+      it.filled_triangle(x + cap, y + h, x, y + h - cap, x + w, y + h - cap, color);
+    }
+  }
+
+  void draw_icon_(Display &it, int x, int y, int w, int h, const uint8_t *data, Color color) {
+    for (int row = 0; row < h; row++) {
+      for (int col = 0; col < w; col++) {
+        uint8_t byte = data[row * ((w + 7) / 8) + (col / 8)];
+        if ((byte & (0x80 >> (col % 8))) != 0) {
+          it.draw_pixel_at(x + col, y + row, color);
+        }
+      }
+    }
+  }
+
+  void draw_seven_segment_(Display &it, int x, int y, int w, int h, char ch, Color color) {
+    bool a=false,b=false,c=false,d=false,e=false,f=false,g=false;
+    switch (ch) {
+      case '0': a=b=c=d=e=f=true; break;
+      case '1': b=c=true; break;
+      case '2': a=b=d=e=g=true; break;
+      case '3': a=b=c=d=g=true; break;
+      case '4': b=c=f=g=true; break;
+      case '5': a=c=d=f=g=true; break;
+      case '6': a=c=d=e=f=g=true; break;
+      case '7': a=b=c=true; break;
+      case '8': a=b=c=d=e=f=g=true; break;
+      case '9': a=b=c=d=f=g=true; break;
+      case 'O': a=b=c=d=e=f=true; break;
+      case 'L': d=e=f=true; break;
+      case '-': g=true; break;
+      default: break;
+    }
+    int t = 10;
+    int half = h / 2;
+    int gap = 1;
+
+    int top_y = y;
+    int mid_y = y + half - t / 2;
+    int bot_y = y + h - t;
+
+    int upper_v_y = top_y + t + gap;
+    int upper_v_h = mid_y - gap - upper_v_y;
+    int lower_v_y = mid_y + t + gap;
+    int lower_v_h = bot_y - gap - lower_v_y;
+
+    if (a) this->draw_segment_(it, x + t / 2, top_y, w - t, t, true, color);
+    if (b && upper_v_h > 0) this->draw_segment_(it, x + w - t, upper_v_y, t, upper_v_h, false, color);
+    if (c && lower_v_h > 0) this->draw_segment_(it, x + w - t, lower_v_y, t, lower_v_h, false, color);
+    if (d) this->draw_segment_(it, x + t / 2, bot_y, w - t, t, true, color);
+    if (e && lower_v_h > 0) this->draw_segment_(it, x, lower_v_y, t, lower_v_h, false, color);
+    if (f && upper_v_h > 0) this->draw_segment_(it, x, upper_v_y, t, upper_v_h, false, color);
+    if (g) this->draw_segment_(it, x + t / 2, mid_y, w - t, t, true, color);
+  }
+
+  void draw_bargraph_(Display &it, uint16_t digits, bool active) {
+    const Color fg(255, 255, 255);
+    const Color inactive(80, 80, 80);
+    uint16_t mapped = active ? static_cast<uint16_t>(digits * 240 / 6000) : 0;
+    if (mapped > 240) mapped = 240;
+    for (uint16_t i = 0; i <= 240; i += 4) {
+      Color col = (active && i <= mapped) ? fg : inactive;
+      int h = (i % 40 == 0) ? 20 : ((i % 20 == 0) ? 15 : 10);
+      it.vertical_line(40 + i, 185 - h, h, col);
+    }
+    it.horizontal_line(35, 185, 250, inactive);
+  }
+};
+
+}  // namespace owon_b35t
+
+static owon_b35t::Meter owon_meter;
@@ -0,0 +1,316 @@
+# Derived work based on https://github.com/reaper7/M5Stack_BLE_client_Owon_B35T by reaper7.
+# AI (ChatGPT) has been used to adopt the Arduino sketch to ESPHome.
+# Ported to M5Stack Core2 due to memory constraints.
+
+substitutions:
+  name: "owon-b35t-m5stack-core2"
+  friendly_name: "OWON B35T Multimeter Core2"
+  device_description: "M5Stack Core2 BLE client for OWON B35T/B35T+ multimeter with local graphical display"
+  owon_mac_address: !secret owon_b35t_mac_address
+
+esphome:
+  name: ${name}
+  friendly_name: ${friendly_name}
+  comment: ${device_description}
+  min_version: 2024.6.0
+  includes:
+    - owon-b35t-m5stack-core2.h
+  on_boot:
+    priority: 850
+    then:
+      - lambda: |-
+          owon_b35t::core2_axp192_init(id(core2_i2c));
+  project:
+    name: "custom.owon-b35t-m5stack-core2"
+    version: "1.0"
+
+esp32:
+  board: m5stack-core2
+  flash_size: 16MB
+  framework:
+    type: esp-idf
+    advanced:
+      minimum_chip_revision: "3.1"
+      sram1_as_iram: true
+
+psram:
+  mode: quad
+  speed: 80MHz
+
+logger:
+  level: INFO
+
+api:
+  encryption:
+    key: !secret apikey
+
+ota:
+  platform: esphome
+  password: !secret ota
+
+wifi:
+  ssid: "Voltage-legacy"
+  password: !secret voltage_legacy_psk
+  #use_address: ${name}.home
+  power_save_mode: none
+  fast_connect: on
+  min_auth_mode: WPA2
+  ap:
+    ssid: "OWON B35T Fallback Hotspot"
+    password: !secret fallback_psk
+
+captive_portal:
+
+interval:
+  - interval: 10s
+    then:
+      - lambda: |-
+          ESP_LOGI("mem", "heap free=%u min_free=%u internal_free=%u internal_largest=%u dma_free=%u dma_largest=%u psram_free=%u psram_largest=%u",
+                   static_cast<unsigned>(esp_get_free_heap_size()),
+                   static_cast<unsigned>(esp_get_minimum_free_heap_size()),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_INTERNAL)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL)),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_DMA)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_DMA)),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM)));
+
+esp32_ble_tracker:
+  scan_parameters:
+    active: true
+    continuous: true
+
+ble_client:
+  - mac_address: ${owon_mac_address}
+    id: owon_ble_client
+    on_connect:
+      then:
+        - lambda: |-
+            owon_meter.on_connect();
+    on_disconnect:
+      then:
+        - lambda: |-
+            owon_meter.on_disconnect();
+
+spi:
+  clk_pin: GPIO18
+  mosi_pin: GPIO23
+
+i2c:
+  id: core2_i2c
+  sda: GPIO21
+  scl: GPIO22
+  scan: true
+
+output:
+  - platform: template
+    type: float
+    id: lcd_backlight
+    write_action:
+      - lambda: |-
+          owon_b35t::core2_axp192_set_backlight(state);
+
+light:
+  - platform: monochromatic
+    output: lcd_backlight
+    name: "${friendly_name} Backlight"
+    id: backlight
+    restore_mode: ALWAYS_ON
+
+font:
+  - file: "fonts/Roboto-Regular.ttf"
+    id: meter_font
+    size: 15
+    glyphs:
+      [
+        " ",
+        "!",
+        "%",
+        "+",
+        "-",
+        ".",
+        "/",
+        "0",
+        "1",
+        "2",
+        "3",
+        "4",
+        "5",
+        "6",
+        "7",
+        "8",
+        "9",
+        "<",
+        ">",
+        "A",
+        "B",
+        "C",
+        "D",
+        "E",
+        "F",
+        "G",
+        "H",
+        "I",
+        "L",
+        "M",
+        "N",
+        "O",
+        "P",
+        "R",
+        "S",
+        "T",
+        "U",
+        "V",
+        "W",
+        "X",
+        "Y",
+        "Z",
+        "a",
+        "c",
+        "d",
+        "e",
+        "f",
+        "g",
+        "h",
+        "i",
+        "k",
+        "m",
+        "n",
+        "o",
+        "r",
+        "s",
+        "t",
+        "u",
+        "v",
+        "w",
+        "y",
+        "z",
+        "°",
+        "µ",
+        "Ω",
+      ]
+
+display:
+  - platform: mipi_spi
+    id: lcd
+    model: M5CORE2
+    update_interval: 500ms
+    lambda: |-
+      owon_meter.render(it, id(meter_font));
+
+touchscreen:
+  - platform: ft63x6
+    id: touch
+    display: lcd
+
+binary_sensor:
+  - platform: touchscreen
+    id: button_a
+    touchscreen_id: touch
+    x_min: 34
+    x_max: 74
+    y_min: 212
+    y_max: 240
+    internal: true
+    on_press:
+      then:
+        - lambda: |-
+            owon_meter.previous_button();
+  - platform: touchscreen
+    id: button_b
+    touchscreen_id: touch
+    x_min: 108
+    x_max: 208
+    y_min: 212
+    y_max: 240
+    internal: true
+    on_click:
+      - min_length: 50ms
+        max_length: 1500ms
+        then:
+          - logger.log:
+              level: INFO
+              format: "OWON short press: %s"
+              args: ["owon_meter.selected_button_name()"]
+          - ble_client.ble_write:
+              id: owon_ble_client
+              service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+              characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+              value: !lambda |-
+                std::vector<uint8_t> data = {owon_meter.selected_button, 0x01};
+                return data;
+      - min_length: 1500ms
+        max_length: 5000ms
+        then:
+          - logger.log:
+              level: INFO
+              format: "OWON long press: %s"
+              args: ["owon_meter.selected_button_name()"]
+          - ble_client.ble_write:
+              id: owon_ble_client
+              service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+              characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+              value: !lambda |-
+                uint8_t press_type = (owon_meter.selected_button == 1 || owon_meter.selected_button == 5) ? 0x01 : 0x00;
+                std::vector<uint8_t> data = {owon_meter.selected_button, press_type};
+                return data;
+  - platform: touchscreen
+    id: button_c
+    touchscreen_id: touch
+    x_min: 242
+    x_max: 282
+    y_min: 212
+    y_max: 240
+    internal: true
+    on_press:
+      then:
+        - lambda: |-
+            owon_meter.next_button();
+
+  - platform: template
+    name: "${friendly_name} Connected"
+    lambda: |-
+      return owon_meter.connected;
+  - platform: template
+    name: "${friendly_name} Overload"
+    lambda: |-
+      return owon_meter.overload;
+  - platform: template
+    name: "${friendly_name} Low Battery"
+    lambda: |-
+      return owon_meter.low_battery;
+
+sensor:
+  - platform: ble_client
+    type: characteristic
+    ble_client_id: owon_ble_client
+    id: owon_notify_source
+    internal: true
+    service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+    characteristic_uuid: "0000fff4-0000-1000-8000-00805f9b34fb"
+    notify: true
+    update_interval: never
+    lambda: |-
+      owon_meter.handle_notify(x);
+      return owon_meter.value();
+
+  - platform: wifi_signal
+    name: "${friendly_name} WiFi Signal"
+    update_interval: 60s
+
+text_sensor:
+  - platform: template
+    name: "${friendly_name} Reading"
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.reading_text();
+  - platform: template
+    name: "${friendly_name} Unit"
+    update_interval: 1s
+    lambda: |-
+      return std::string(owon_meter.scale()) + owon_meter.unit();
+  - platform: template
+    name: "${friendly_name} Mode"
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.mode_text();
@@ -0,0 +1,567 @@
+/*
+ * ESPHome helper for OWON B35T/B35T+ BLE meter on M5Stack Core 1.
+ * Parser is based on the standalone Arduino sketch by Reaper7
+ * (Beerware license, Revision 42) and Dean Cording's owonb35 notes.
+ */
+#pragma once
+
+#include <cmath>
+#include <cstdint>
+#include <cstring>
+#include <string>
+#include <vector>
+#include "esp_heap_caps.h"
+#include "esp_system.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+#include "esphome/components/display/display.h"
+
+namespace owon_b35t {
+
+using esphome::Color;
+using esphome::display::Display;
+
+static const char *const TAG = "owon_b35t";
+
+static const uint8_t ACCU_BMP[32] = {
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b11111111, 0b11111110,
+    0b10000000, 0b00000010,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000010,
+    0b11111111, 0b11111110,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+};
+
+static const uint8_t BLE_BMP[32] = {
+    0b00000001, 0b10000000,
+    0b00000001, 0b11000000,
+    0b00010001, 0b01100000,
+    0b00011001, 0b00110000,
+    0b00001101, 0b00011000,
+    0b00000111, 0b00110000,
+    0b00000011, 0b01100000,
+    0b00000001, 0b11000000,
+    0b00000001, 0b11000000,
+    0b00000011, 0b01100000,
+    0b00000111, 0b00110000,
+    0b00001101, 0b00011000,
+    0b00011001, 0b00110000,
+    0b00010001, 0b01100000,
+    0b00000001, 0b11000000,
+    0b00000001, 0b10000000,
+};
+
+static const uint8_t DIODE_BMP[32] = {
+    0b00001000, 0b00011000,
+    0b00001100, 0b00011000,
+    0b00001110, 0b00011000,
+    0b00001111, 0b00011000,
+    0b00001111, 0b10011000,
+    0b00001111, 0b11011000,
+    0b00001111, 0b11111000,
+    0b11111111, 0b11111111,
+    0b11111111, 0b11111111,
+    0b00001111, 0b11111000,
+    0b00001111, 0b11011000,
+    0b00001111, 0b10011000,
+    0b00001111, 0b00011000,
+    0b00001110, 0b00011000,
+    0b00001100, 0b00011000,
+    0b00001000, 0b00011000,
+};
+
+static const uint8_t BUZZ_BMP[32] = {
+    0b00000000, 0b11000000,
+    0b00000001, 0b11000000,
+    0b00000011, 0b11000001,
+    0b00000111, 0b11000001,
+    0b00001111, 0b11000101,
+    0b11111111, 0b11000101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11000101,
+    0b00001111, 0b11000101,
+    0b00000111, 0b11000001,
+    0b00000011, 0b11000001,
+    0b00000001, 0b11000000,
+    0b00000000, 0b11000000,
+};
+
+class Meter {
+ public:
+  static constexpr uint8_t REGPLUSMINUS = 0x00;
+  static constexpr uint8_t FLAGPLUS = 0b00101011;
+  static constexpr uint8_t FLAGMINUS = 0b00101101;
+  static constexpr uint8_t REGDIG1 = 0x01;
+  static constexpr uint8_t REGDIG2 = 0x02;
+  static constexpr uint8_t REGDIG3 = 0x03;
+  static constexpr uint8_t REGDIG4 = 0x04;
+  static constexpr uint8_t REGPOINT = 0x06;
+  static constexpr uint8_t FLAGPOINT0 = 0b00110000;
+  static constexpr uint8_t FLAGPOINT1 = 0b00110001;
+  static constexpr uint8_t FLAGPOINT2 = 0b00110010;
+  static constexpr uint8_t FLAGPOINT3 = 0b00110100;
+  static constexpr uint8_t REGMODE = 0x07;
+  static constexpr uint8_t FLAGMODEHOLD = 0b00000010;
+  static constexpr uint8_t FLAGMODEREL = 0b00000100;
+  static constexpr uint8_t FLAGMODEAC = 0b00001000;
+  static constexpr uint8_t FLAGMODEDC = 0b00010000;
+  static constexpr uint8_t FLAGMODEAUTO = 0b00100000;
+  static constexpr uint8_t REGMINMAX = 0x08;
+  static constexpr uint8_t FLAGMIN = 0b00010000;
+  static constexpr uint8_t FLAGMAX = 0b00100000;
+  static constexpr uint8_t REGSCALE = 0x09;
+  static constexpr uint8_t FLAGSCALEDUTY = 0b00000010;
+  static constexpr uint8_t FLAGSCALEDIODE = 0b00000100;
+  static constexpr uint8_t FLAGSCALEBUZZ = 0b00001000;
+  static constexpr uint8_t FLAGSCALEMEGA = 0b00010000;
+  static constexpr uint8_t FLAGSCALEKILO = 0b00100000;
+  static constexpr uint8_t FLAGSCALEMILLI = 0b01000000;
+  static constexpr uint8_t FLAGSCALEMICRO = 0b10000000;
+  static constexpr uint8_t REGUNIT = 0x0a;
+  static constexpr uint8_t FLAGUNITFAHR = 0b00000001;
+  static constexpr uint8_t FLAGUNITGRAD = 0b00000010;
+  static constexpr uint8_t FLAGUNITNF = 0b00000100;
+  static constexpr uint8_t FLAGUNITHZ = 0b00001000;
+  static constexpr uint8_t FLAGUNITHFE = 0b00010000;
+  static constexpr uint8_t FLAGUNITOHM = 0b00100000;
+  static constexpr uint8_t FLAGUNITAMP = 0b01000000;
+  static constexpr uint8_t FLAGUNITVOLT = 0b10000000;
+
+  bool connected{false};
+  bool write_available{false};
+  bool is_plus{false};
+  bool low_battery{false};
+  bool overload{false};
+  bool has_reading{false};
+  uint8_t selected_button{1};
+  uint32_t last_notify_ms{0};
+
+  bool handle_notify(const std::vector<uint8_t> &data) {
+    if (data.size() > sizeof(this->raw_))
+      return false;
+    if (data.size() == 6 && data[1] >= 0xF0) {
+      memset(this->raw_, 0, sizeof(this->raw_));
+      memcpy(this->raw_, data.data(), data.size());
+      this->is_plus = true;
+      this->parse_plus_();
+    } else if (data.size() == 14 && data[12] == 0x0D && data[13] == 0x0A) {
+      memset(this->value_, 0, sizeof(this->value_));
+      memcpy(this->value_, data.data(), data.size());
+      this->is_plus = false;
+    } else {
+      ESP_LOGW(TAG, "Ignoring unexpected OWON frame length=%u", static_cast<unsigned>(data.size()));
+      return false;
+    }
+
+    this->overload = memcmp(this->value_, OVERLOAD_FRAME, sizeof(OVERLOAD_FRAME)) == 0;
+    this->display_value = this->calc_display_value_();
+    this->base_value = this->calc_base_value_();
+    this->has_reading = true;
+    this->last_notify_ms = millis();
+    return true;
+  }
+
+  void on_connect() {
+    this->connected = true;
+    this->write_available = true;
+  }
+
+  void on_disconnect() {
+    this->connected = false;
+    this->write_available = false;
+  }
+
+  float value() const { return this->display_value; }
+  float value_base() const { return this->base_value; }
+  bool negative() const { return (this->value_[REGPLUSMINUS] & FLAGMINUS) == FLAGMINUS; }
+  bool auto_range() const { return (this->value_[REGMODE] & FLAGMODEAUTO) == FLAGMODEAUTO; }
+  bool hold() const { return (this->value_[REGMODE] & FLAGMODEHOLD) == FLAGMODEHOLD; }
+  bool relative() const { return (this->value_[REGMODE] & FLAGMODEREL) == FLAGMODEREL; }
+  bool ac() const { return (this->value_[REGMODE] & FLAGMODEAC) == FLAGMODEAC; }
+  bool dc() const { return (this->value_[REGMODE] & FLAGMODEDC) == FLAGMODEDC; }
+  bool min_mode() const { return (this->value_[REGMINMAX] & FLAGMIN) == FLAGMIN; }
+  bool max_mode() const { return (this->value_[REGMINMAX] & FLAGMAX) == FLAGMAX; }
+  bool diode() const { return (this->value_[REGSCALE] & FLAGSCALEDIODE) == FLAGSCALEDIODE; }
+  bool continuity() const { return (this->value_[REGSCALE] & FLAGSCALEBUZZ) == FLAGSCALEBUZZ; }
+
+  const char *unit() const {
+    switch (this->value_[REGUNIT]) {
+      case FLAGUNITFAHR: return "°F";
+      case FLAGUNITGRAD: return "°C";
+      case FLAGUNITNF: return "nF";
+      case FLAGUNITHZ: return "Hz";
+      case FLAGUNITHFE: return "hFE";
+      case FLAGUNITOHM: return "Ω";
+      case FLAGUNITAMP: return "A";
+      case FLAGUNITVOLT: return "V";
+      default: return "";
+    }
+  }
+
+  const char *scale() const {
+    if ((this->value_[REGSCALE] & FLAGSCALEDUTY) == FLAGSCALEDUTY) return "%";
+    if ((this->value_[REGSCALE] & FLAGSCALEMEGA) == FLAGSCALEMEGA) return "M";
+    if ((this->value_[REGSCALE] & FLAGSCALEKILO) == FLAGSCALEKILO) return "k";
+    if ((this->value_[REGSCALE] & FLAGSCALEMILLI) == FLAGSCALEMILLI) return "m";
+    if ((this->value_[REGSCALE] & FLAGSCALEMICRO) == FLAGSCALEMICRO) return "µ";
+    return "";
+  }
+
+  std::string mode_text() const {
+    std::string out;
+    if (this->dc()) out += "DC ";
+    if (this->ac()) out += "AC ";
+    if (this->auto_range()) out += "AUTO ";
+    if (this->hold()) out += "HOLD ";
+    if (this->relative()) out += "REL ";
+    if (this->min_mode()) out += "MIN ";
+    if (this->max_mode()) out += "MAX ";
+    if (this->diode()) out += "DIODE ";
+    if (this->continuity()) out += "CONT ";
+    if (!out.empty()) out.pop_back();
+    return out;
+  }
+
+  std::string reading_text() const {
+    if (!this->connected) return "Disconnected";
+    if (!this->has_reading) return "Waiting for data";
+    if (this->overload) return "OL " + std::string(this->scale()) + this->unit();
+    char buf[48];
+    snprintf(buf, sizeof(buf), "%s%.4g %s%s", this->negative() ? "-" : "", std::fabs(this->display_value), this->scale(), this->unit());
+    return std::string(buf);
+  }
+
+  enum Kind { KIND_OTHER, KIND_VOLTAGE, KIND_CURRENT, KIND_RESISTANCE, KIND_FREQUENCY, KIND_CAPACITANCE, KIND_TEMP_C, KIND_TEMP_F, KIND_DUTY };
+  Kind kind() const {
+    if ((this->value_[REGSCALE] & FLAGSCALEDUTY) == FLAGSCALEDUTY) return KIND_DUTY;
+    switch (this->value_[REGUNIT]) {
+      case FLAGUNITVOLT: return KIND_VOLTAGE;
+      case FLAGUNITAMP: return KIND_CURRENT;
+      case FLAGUNITOHM: return KIND_RESISTANCE;
+      case FLAGUNITHZ: return KIND_FREQUENCY;
+      case FLAGUNITNF: return KIND_CAPACITANCE;
+      case FLAGUNITGRAD: return KIND_TEMP_C;
+      case FLAGUNITFAHR: return KIND_TEMP_F;
+      default: return KIND_OTHER;
+    }
+  }
+
+  const char *selected_button_name() const {
+    static const char *const names[] = {"SELECT", "RANGE", "HLD/LIG", "REL/BT", "HZ/DUTY", "MAX/MIN"};
+    uint8_t index = this->selected_button;
+    if (index < 1) index = 1;
+    if (index > 6) index = 6;
+    return names[index - 1];
+  }
+
+  void previous_button() {
+    if (this->selected_button > 1) this->selected_button--;
+  }
+  void next_button() {
+    if (this->selected_button < 6) this->selected_button++;
+  }
+
+  void render(Display &it, esphome::display::BaseFont *font) {
+    const Color bg(0, 0, 0);
+    const Color fg(210, 210, 210);
+    // Chosen to map to a neutral dark gray in the RGB332 8-bit display palette.
+    const Color inactive(80, 80, 80);
+    const Color yellow(255, 220, 0);
+    const Color blue(0, 80, 255);
+    const Color cyan(0, 255, 255);
+    const Color magenta(255, 0, 255);
+    const Color red(255, 0, 0);
+    const Color green(0, 220, 0);
+    const Color orange(255, 165, 0);
+
+    it.fill(bg);
+    this->draw_icon_(it, 12, 8, 16, 16, ACCU_BMP, this->low_battery ? red : green);
+    this->draw_icon_(it, 46, 8, 16, 16, BLE_BMP, this->connected ? blue : inactive);
+    this->label_(it, font, 86, 8, "AUTO", this->auto_range() ? fg : inactive);
+    this->label_(it, font, 138, 8, "MAX", this->max_mode() ? red : inactive);
+    this->label_(it, font, 178, 8, "MIN", this->min_mode() ? green : inactive);
+    this->label_(it, font, 218, 8, "HOLD", this->hold() ? blue : inactive);
+    this->label_(it, font, 270, 8, "REL", this->relative() ? Color(128, 128, 0) : inactive);
+
+    this->label_(it, font, 8, 66, "DC", this->dc() ? cyan : inactive);
+    this->label_(it, font, 8, 102, "AC", this->ac() ? magenta : inactive);
+
+    if (!this->connected) {
+      this->draw_digits_(it, "----", false, inactive);
+      it.print(160, 148, font, inactive, esphome::display::TextAlign::CENTER, "scan/connect");
+    } else if (!this->has_reading) {
+      this->draw_digits_(it, "8888", false, inactive);
+      it.print(160, 148, font, inactive, esphome::display::TextAlign::CENTER, "waiting");
+    } else if (this->overload) {
+      this->draw_digits_(it, " OL ", false, fg);
+    } else {
+      char d[5];
+      d[0] = this->digit_char_(REGDIG1);
+      d[1] = this->digit_char_(REGDIG2);
+      d[2] = this->digit_char_(REGDIG3);
+      d[3] = this->digit_char_(REGDIG4);
+      d[4] = 0;
+      this->draw_digits_(it, d, this->negative(), fg);
+      this->draw_decimal_points_(it, fg);
+    }
+
+    std::string unit_line = std::string(this->scale()) + this->unit();
+    it.print(270, 140, font, yellow, esphome::display::TextAlign::CENTER, unit_line.c_str());
+
+    this->draw_bargraph_(it, this->has_reading && !this->overload ? this->digits_from_buffer_() : 0, this->has_reading && !this->overload);
+    this->draw_icon_(it, 300, 148, 16, 16, DIODE_BMP, this->diode() ? magenta : inactive);
+    this->draw_icon_(it, 300, 174, 16, 16, BUZZ_BMP, this->continuity() ? orange : inactive);
+
+    it.filled_rectangle(34, 212, 40, 24, this->write_available ? fg : inactive);
+    it.filled_rectangle(108, 212, 100, 24, this->write_available ? fg : inactive);
+    it.filled_rectangle(242, 212, 40, 24, this->write_available ? fg : inactive);
+    it.print(54, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, "<");
+    it.print(158, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, this->selected_button_name());
+    it.print(262, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, ">");
+  }
+
+ private:
+  uint8_t raw_[14]{};
+  uint8_t value_[14]{};
+  float display_value{NAN};
+  float base_value{NAN};
+  static constexpr uint8_t OVERLOAD_FRAME[5] = {0x2B, 0x3F, 0x30, 0x3A, 0x3F};
+
+  uint16_t digits_from_buffer_() const {
+    uint16_t out = 0;
+    if (this->value_[REGDIG1] >= '0' && this->value_[REGDIG1] <= '9') out += (this->value_[REGDIG1] - '0') * 1000;
+    if (this->value_[REGDIG2] >= '0' && this->value_[REGDIG2] <= '9') out += (this->value_[REGDIG2] - '0') * 100;
+    if (this->value_[REGDIG3] >= '0' && this->value_[REGDIG3] <= '9') out += (this->value_[REGDIG3] - '0') * 10;
+    if (this->value_[REGDIG4] >= '0' && this->value_[REGDIG4] <= '9') out += (this->value_[REGDIG4] - '0');
+    return out;
+  }
+
+  float calc_display_value_() const {
+    if (this->overload) return NAN;
+
+    if (this->is_plus) {
+      uint16_t pair1 = static_cast<uint16_t>(this->raw_[0]) | (static_cast<uint16_t>(this->raw_[1]) << 8);
+      uint8_t decimal = pair1 & 0x07;
+      if (decimal >= 7) return NAN;
+
+      uint16_t pair3 = static_cast<uint16_t>(this->raw_[4]) | (static_cast<uint16_t>(this->raw_[5]) << 8);
+      bool negative = pair3 >= 0x7FFF;
+      uint16_t digits = negative ? (pair3 & 0x7FFF) : pair3;
+      float v = static_cast<float>(digits) / std::pow(10.0f, decimal);
+      return negative ? -v : v;
+    }
+
+    uint8_t decimal = 0;
+    switch (this->value_[REGPOINT] & 0x07) {
+      case 0b001: decimal = 1; break;
+      case 0b010: decimal = 2; break;
+      case 0b100: decimal = 3; break;
+      default: break;
+    }
+    float v = static_cast<float>(this->digits_from_buffer_()) / std::pow(10.0f, decimal);
+    return this->negative() ? -v : v;
+  }
+
+  float calc_base_value_() const {
+    if (std::isnan(this->display_value)) return NAN;
+    if (this->value_[REGUNIT] == FLAGUNITNF) return this->display_value * 1e-9f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMEGA) == FLAGSCALEMEGA) return this->display_value * 1e6f;
+    if ((this->value_[REGSCALE] & FLAGSCALEKILO) == FLAGSCALEKILO) return this->display_value * 1e3f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMILLI) == FLAGSCALEMILLI) return this->display_value * 1e-3f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMICRO) == FLAGSCALEMICRO) return this->display_value * 1e-6f;
+    return this->display_value;
+  }
+
+  void parse_plus_() {
+    memset(this->value_, 0, sizeof(this->value_));
+    this->value_[5] = 0x20;
+    this->value_[12] = 0x0D;
+    this->value_[13] = 0x0A;
+
+    uint16_t pair1 = static_cast<uint16_t>(this->raw_[0]) | (static_cast<uint16_t>(this->raw_[1]) << 8);
+    uint8_t function = (pair1 >> 6) & 0x0F;
+    uint8_t scale = (pair1 >> 3) & 0x07;
+    uint8_t decimal = pair1 & 0x07;
+
+    switch (decimal) {
+      case 0: this->value_[REGPOINT] = FLAGPOINT0; break;
+      case 1: this->value_[REGPOINT] = FLAGPOINT3; break;
+      case 2: this->value_[REGPOINT] = FLAGPOINT2; break;
+      case 3: this->value_[REGPOINT] = FLAGPOINT1; break;
+      default: break;
+    }
+
+    switch (function) {
+      case 0: this->value_[REGUNIT] |= FLAGUNITVOLT; this->value_[REGMODE] |= FLAGMODEDC; break;
+      case 1: this->value_[REGUNIT] |= FLAGUNITVOLT; this->value_[REGMODE] |= FLAGMODEAC; break;
+      case 2: this->value_[REGUNIT] |= FLAGUNITAMP; this->value_[REGMODE] |= FLAGMODEDC; break;
+      case 3: this->value_[REGUNIT] |= FLAGUNITAMP; this->value_[REGMODE] |= FLAGMODEAC; break;
+      case 4: this->value_[REGUNIT] |= FLAGUNITOHM; break;
+      case 5: this->value_[REGUNIT] |= FLAGUNITNF; break;
+      case 6: this->value_[REGUNIT] |= FLAGUNITHZ; break;
+      case 7: this->value_[REGSCALE] |= FLAGSCALEDUTY; break;
+      case 8: this->value_[REGUNIT] |= FLAGUNITGRAD; break;
+      case 9: this->value_[REGUNIT] |= FLAGUNITFAHR; break;
+      case 10: this->value_[REGSCALE] |= FLAGSCALEDIODE; break;
+      case 11: this->value_[REGSCALE] |= FLAGSCALEBUZZ; break;
+      case 12: this->value_[REGUNIT] |= FLAGUNITHFE; break;
+      default: break;
+    }
+
+    switch (scale) {
+      case 2: this->value_[REGSCALE] |= FLAGSCALEMICRO; break;
+      case 3: this->value_[REGSCALE] |= FLAGSCALEMILLI; break;
+      case 5: this->value_[REGSCALE] |= FLAGSCALEKILO; break;
+      case 6: this->value_[REGSCALE] |= FLAGSCALEMEGA; break;
+      default: break;
+    }
+
+    uint16_t pair2 = static_cast<uint16_t>(this->raw_[2]) | (static_cast<uint16_t>(this->raw_[3]) << 8);
+    if (pair2 & (1 << 0)) this->value_[REGMODE] |= FLAGMODEHOLD;
+    if (pair2 & (1 << 1)) this->value_[REGMODE] |= FLAGMODEREL;
+    if (pair2 & (1 << 2)) this->value_[REGMODE] |= FLAGMODEAUTO;
+    this->low_battery = (pair2 & (1 << 3)) != 0;
+    if (pair2 & (1 << 4)) this->value_[REGMINMAX] |= FLAGMIN;
+    if (pair2 & (1 << 5)) this->value_[REGMINMAX] |= FLAGMAX;
+
+    uint16_t pair3 = static_cast<uint16_t>(this->raw_[4]) | (static_cast<uint16_t>(this->raw_[5]) << 8);
+    if (decimal < 7) {
+      uint16_t digits = pair3;
+      if (pair3 < 0x7FFF) {
+        this->value_[REGPLUSMINUS] = FLAGPLUS;
+      } else {
+        this->value_[REGPLUSMINUS] = FLAGMINUS;
+        digits = pair3 & 0x7FFF;
+      }
+      this->value_[REGDIG1] = '0' + ((digits / 1000) % 10);
+      this->value_[REGDIG2] = '0' + ((digits / 100) % 10);
+      this->value_[REGDIG3] = '0' + ((digits / 10) % 10);
+      this->value_[REGDIG4] = '0' + (digits % 10);
+    } else {
+      memcpy(this->value_, OVERLOAD_FRAME, sizeof(OVERLOAD_FRAME));
+    }
+  }
+
+  char digit_char_(uint8_t reg) const {
+    uint8_t c = this->value_[reg];
+    return (c >= '0' && c <= '9') ? static_cast<char>(c) : ' ';
+  }
+
+  void label_(Display &it, esphome::display::BaseFont *font, int x, int y, const char *text, Color color) {
+    it.print(x, y, font, color, esphome::display::TextAlign::TOP_LEFT, text);
+  }
+
+  void draw_digits_(Display &it, const char *text, bool negative, Color color) {
+    if (negative) this->draw_segment_(it, 8, 88, 26, 9, true, color);
+    constexpr int digit_x = 40;
+    constexpr int digit_y = 35;
+    constexpr int digit_w = 50;
+    constexpr int digit_h = 88;
+    constexpr int digit_distance = 64;
+    for (int i = 0; i < 4; i++) {
+      this->draw_seven_segment_(it, digit_x + i * digit_distance, digit_y, digit_w, digit_h, text[i], color);
+    }
+  }
+
+  void draw_decimal_points_(Display &it, Color color) {
+    uint8_t p = this->value_[REGPOINT];
+    if ((p & FLAGPOINT1) == FLAGPOINT1) it.filled_rectangle(95, 117, 8, 10, color);
+    if ((p & FLAGPOINT2) == FLAGPOINT2) it.filled_rectangle(159, 117, 8, 10, color);
+    if ((p & FLAGPOINT3) == FLAGPOINT3) it.filled_rectangle(223, 117, 8, 10, color);
+  }
+
+  void draw_segment_(Display &it, int x, int y, int w, int h, bool horizontal, Color color) {
+    if (horizontal) {
+      int cap = h / 2;
+      it.filled_rectangle(x + cap, y, w - 2 * cap, h, color);
+      it.filled_triangle(x, y + cap, x + cap, y, x + cap, y + h, color);
+      it.filled_triangle(x + w, y + cap, x + w - cap, y, x + w - cap, y + h, color);
+    } else {
+      int cap = w / 2;
+      it.filled_rectangle(x, y + cap, w, h - 2 * cap, color);
+      it.filled_triangle(x + cap, y, x, y + cap, x + w, y + cap, color);
+      it.filled_triangle(x + cap, y + h, x, y + h - cap, x + w, y + h - cap, color);
+    }
+  }
+
+  void draw_icon_(Display &it, int x, int y, int w, int h, const uint8_t *data, Color color) {
+    for (int row = 0; row < h; row++) {
+      for (int col = 0; col < w; col++) {
+        uint8_t byte = data[row * ((w + 7) / 8) + (col / 8)];
+        if ((byte & (0x80 >> (col % 8))) != 0) {
+          it.draw_pixel_at(x + col, y + row, color);
+        }
+      }
+    }
+  }
+
+  void draw_seven_segment_(Display &it, int x, int y, int w, int h, char ch, Color color) {
+    bool a=false,b=false,c=false,d=false,e=false,f=false,g=false;
+    switch (ch) {
+      case '0': a=b=c=d=e=f=true; break;
+      case '1': b=c=true; break;
+      case '2': a=b=d=e=g=true; break;
+      case '3': a=b=c=d=g=true; break;
+      case '4': b=c=f=g=true; break;
+      case '5': a=c=d=f=g=true; break;
+      case '6': a=c=d=e=f=g=true; break;
+      case '7': a=b=c=true; break;
+      case '8': a=b=c=d=e=f=g=true; break;
+      case '9': a=b=c=d=f=g=true; break;
+      case 'O': a=b=c=d=e=f=true; break;
+      case 'L': d=e=f=true; break;
+      case '-': g=true; break;
+      default: break;
+    }
+    int t = 10;
+    int half = h / 2;
+    int gap = 1;
+
+    int top_y = y;
+    int mid_y = y + half - t / 2;
+    int bot_y = y + h - t;
+
+    int upper_v_y = top_y + t + gap;
+    int upper_v_h = mid_y - gap - upper_v_y;
+    int lower_v_y = mid_y + t + gap;
+    int lower_v_h = bot_y - gap - lower_v_y;
+
+    if (a) this->draw_segment_(it, x + t / 2, top_y, w - t, t, true, color);
+    if (b && upper_v_h > 0) this->draw_segment_(it, x + w - t, upper_v_y, t, upper_v_h, false, color);
+    if (c && lower_v_h > 0) this->draw_segment_(it, x + w - t, lower_v_y, t, lower_v_h, false, color);
+    if (d) this->draw_segment_(it, x + t / 2, bot_y, w - t, t, true, color);
+    if (e && lower_v_h > 0) this->draw_segment_(it, x, lower_v_y, t, lower_v_h, false, color);
+    if (f && upper_v_h > 0) this->draw_segment_(it, x, upper_v_y, t, upper_v_h, false, color);
+    if (g) this->draw_segment_(it, x + t / 2, mid_y, w - t, t, true, color);
+  }
+
+  void draw_bargraph_(Display &it, uint16_t digits, bool active) {
+    const Color fg(255, 255, 255);
+    const Color inactive(80, 80, 80);
+    uint16_t mapped = active ? static_cast<uint16_t>(digits * 240 / 6000) : 0;
+    if (mapped > 240) mapped = 240;
+    for (uint16_t i = 0; i <= 240; i += 4) {
+      Color col = (active && i <= mapped) ? fg : inactive;
+      int h = (i % 40 == 0) ? 20 : ((i % 20 == 0) ? 15 : 10);
+      it.vertical_line(40 + i, 185 - h, h, col);
+    }
+    it.horizontal_line(35, 185, 250, inactive);
+  }
+};
+
+}  // namespace owon_b35t
+
+static owon_b35t::Meter owon_meter;
@@ -25,10 +25,13 @@ external_components:
      components: [es8388]
      refresh: 0s

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: Voltage-legacy
  password: !secret voltage_legacy_psk
-  use_address: ${name}.home
+  #use_address: ${name}.home
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -16,10 +16,13 @@ esp32:
  framework:
    type: arduino

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: bathroom.home  
+  #use_address: bathroom.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -16,10 +16,13 @@ esp32:
  framework:
    type: esp-idf

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: ${name}.home  
+  #use_address: ${name}.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -16,6 +16,9 @@ esp32:
  framework:
    type: esp-idf

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
@@ -16,10 +16,13 @@ esp32:
  framework:
    type: esp-idf

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: cam-livingroom.home  
+  #use_address: cam-livingroom.home  
  power_save_mode: high
  fast_connect: on

@@ -0,0 +1,785 @@
+/*
+ * ESPHome helper for OWON B35T/B35T+ BLE meter on M5Stack Core 2.
+ * Parser is based on the standalone Arduino sketch by Reaper7
+ * (Beerware license, Revision 42) and Dean Cording's owonb35 notes.
+ * Rendering code and some functionality modified to suppport the
+ * Atorch DL24 dc load.
+ */
+
+#pragma once
+
+#include <cmath>
+#include <cstdint>
+#include <cstring>
+#include <string>
+#include <vector>
+#include "esp_heap_caps.h"
+#include "esp_system.h"
+#include "esphome/core/helpers.h"
+#include "esphome/components/i2c/i2c.h"
+#include "esphome/core/log.h"
+#include "esphome/components/display/display.h"
+
+namespace owon_b35t {
+
+using esphome::Color;
+using esphome::display::Display;
+
+static const char *const TAG = "owon_b35t";
+static const char *const POWER_TAG = "core2_power";
+static constexpr uint8_t AXP192_ADDR = 0x34;
+static esphome::i2c::I2CDevice axp192;
+static bool axp192_ready = false;
+
+static bool axp_write(uint8_t reg, uint8_t value) {
+  if (!axp192_ready) return false;
+  bool ok = axp192.write_byte(reg, value);
+  if (!ok) ESP_LOGW(POWER_TAG, "AXP192 write reg 0x%02X failed", reg);
+  return ok;
+}
+
+static bool axp_read(uint8_t reg, uint8_t *value) {
+  if (!axp192_ready) return false;
+  bool ok = axp192.read_byte(reg, value);
+  if (!ok) ESP_LOGW(POWER_TAG, "AXP192 read reg 0x%02X failed", reg);
+  return ok;
+}
+
+static void axp_update(uint8_t reg, uint8_t clear_mask, uint8_t set_mask) {
+  uint8_t value = 0;
+  if (!axp_read(reg, &value)) return;
+  value = (value & ~clear_mask) | set_mask;
+  axp_write(reg, value);
+}
+
+static uint8_t axp_dc_voltage_data(uint16_t millivolts) {
+  if (millivolts < 700) millivolts = 700;
+  if (millivolts > 3500) millivolts = 3500;
+  return static_cast<uint8_t>((millivolts - 700) / 25) & 0x7F;
+}
+
+static uint8_t axp_ldo_voltage_data(uint16_t millivolts) {
+  if (millivolts < 1800) millivolts = 1800;
+  if (millivolts > 3300) millivolts = 3300;
+  return static_cast<uint8_t>((millivolts - 1800) / 100) & 0x0F;
+}
+
+static void core2_axp192_set_lcd_voltage(uint16_t millivolts) {
+  uint8_t value = 0;
+  axp_read(0x27, &value);
+  axp_write(0x27, (value & 0x80) | axp_dc_voltage_data(millivolts));  // DCDC3, LCD backlight
+}
+
+static void core2_axp192_set_backlight(float brightness) {
+  if (brightness <= 0.0f) {
+    axp_update(0x12, 0x02, 0x00);  // DCDC3 off
+    return;
+  }
+  if (brightness > 1.0f) brightness = 1.0f;
+  uint16_t millivolts = static_cast<uint16_t>(2400 + brightness * 900);
+  core2_axp192_set_lcd_voltage(millivolts);
+  axp_update(0x12, 0x00, 0x02);  // DCDC3 on
+}
+
+static void core2_axp192_init(esphome::i2c::I2CBus *bus) {
+  axp192.set_i2c_bus(bus);
+  axp192.set_i2c_address(AXP192_ADDR);
+  axp192_ready = true;
+  ESP_LOGI(POWER_TAG, "Initializing M5Stack Core2 AXP192 LCD power");
+  axp_update(0x30, 0xF9, 0x02);  // Disable VBUS current limit, preserve bit 2.
+  axp_update(0x92, 0x07, 0x00);  // GPIO1 open-drain output.
+  axp_update(0x93, 0x07, 0x00);  // GPIO2 open-drain output.
+  axp_write(0x35, 0xA2);         // RTC battery charging.
+
+  uint8_t value = 0;
+  axp_read(0x26, &value);
+  axp_write(0x26, (value & 0x80) | axp_dc_voltage_data(3350));  // DCDC1 ESP32 VDD.
+  core2_axp192_set_lcd_voltage(2800);
+
+  uint8_t ldo2 = axp_ldo_voltage_data(3300);
+  uint8_t ldo3 = axp_ldo_voltage_data(2000);
+  axp_write(0x28, (ldo2 << 4) | ldo3);  // LDO2 LCD logic/SD, LDO3 vibrator.
+  axp_update(0x12, 0x00, 0x07);         // Enable DCDC1, DCDC3, LDO2.
+  axp_write(0x82, 0xFF);                // ADCs on.
+  axp_update(0x95, 0x8D, 0x84);         // GPIO4 setup, as M5Core2 library does.
+  axp_write(0x36, 0x4C);                // Power key timing.
+
+  // LCD reset through AXP192 GPIO4.
+  axp_update(0x96, 0x02, 0x00);
+  delay(100);
+  axp_update(0x96, 0x00, 0x02);
+  delay(100);
+
+  core2_axp192_set_backlight(1.0f);
+}
+
+static const uint8_t ACCU_BMP[32] = {
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b11111111, 0b11111110,
+    0b10000000, 0b00000010,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000011,
+    0b10000000, 0b00000010,
+    0b11111111, 0b11111110,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+    0b00000000, 0b00000000,
+};
+
+static const uint8_t BLE_BMP[32] = {
+    0b00000001, 0b10000000,
+    0b00000001, 0b11000000,
+    0b00010001, 0b01100000,
+    0b00011001, 0b00110000,
+    0b00001101, 0b00011000,
+    0b00000111, 0b00110000,
+    0b00000011, 0b01100000,
+    0b00000001, 0b11000000,
+    0b00000001, 0b11000000,
+    0b00000011, 0b01100000,
+    0b00000111, 0b00110000,
+    0b00001101, 0b00011000,
+    0b00011001, 0b00110000,
+    0b00010001, 0b01100000,
+    0b00000001, 0b11000000,
+    0b00000001, 0b10000000,
+};
+
+static const uint8_t HOLD_BMP[32] = {
+    0b01111111, 0b11111110,
+    0b11111111, 0b11111111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100000, 0b00000111,
+    0b11100000, 0b00000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11100011, 0b11000111,
+    0b11111111, 0b11111111,
+    0b01111111, 0b11111110,
+};
+
+static const uint8_t REL_BMP[32] = {
+    0b00000001, 0b00000000,
+    0b00000001, 0b00000000,
+    0b00000011, 0b10000000,
+    0b00000011, 0b10000000,
+    0b00000110, 0b11000000,
+    0b00000110, 0b11000000,
+    0b00001100, 0b01100000,
+    0b00001100, 0b01100000,
+    0b00011000, 0b00110000,
+    0b00011000, 0b00110000,
+    0b00110000, 0b00011000,
+    0b00110000, 0b00011000,
+    0b01100000, 0b00001100,
+    0b01100000, 0b00001100,
+    0b11111111, 0b11111110,
+    0b11111111, 0b11111110,
+};
+
+static const uint8_t DIODE_BMP[32] = {
+    0b00001000, 0b00011000,
+    0b00001100, 0b00011000,
+    0b00001110, 0b00011000,
+    0b00001111, 0b00011000,
+    0b00001111, 0b10011000,
+    0b00001111, 0b11011000,
+    0b00001111, 0b11111000,
+    0b11111111, 0b11111111,
+    0b11111111, 0b11111111,
+    0b00001111, 0b11111000,
+    0b00001111, 0b11011000,
+    0b00001111, 0b10011000,
+    0b00001111, 0b00011000,
+    0b00001110, 0b00011000,
+    0b00001100, 0b00011000,
+    0b00001000, 0b00011000,
+};
+
+static const uint8_t BUZZ_BMP[32] = {
+    0b00000000, 0b11000000,
+    0b00000001, 0b11000000,
+    0b00000011, 0b11000001,
+    0b00000111, 0b11000001,
+    0b00001111, 0b11000101,
+    0b11111111, 0b11000101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11010101,
+    0b11111111, 0b11000101,
+    0b00001111, 0b11000101,
+    0b00000111, 0b11000001,
+    0b00000011, 0b11000001,
+    0b00000001, 0b11000000,
+    0b00000000, 0b11000000,
+};
+
+class Meter {
+ public:
+  static constexpr uint8_t REGPLUSMINUS = 0x00;
+  static constexpr uint8_t FLAGPLUS = 0b00101011;
+  static constexpr uint8_t FLAGMINUS = 0b00101101;
+  static constexpr uint8_t REGDIG1 = 0x01;
+  static constexpr uint8_t REGDIG2 = 0x02;
+  static constexpr uint8_t REGDIG3 = 0x03;
+  static constexpr uint8_t REGDIG4 = 0x04;
+  static constexpr uint8_t REGPOINT = 0x06;
+  static constexpr uint8_t FLAGPOINT0 = 0b00110000;
+  static constexpr uint8_t FLAGPOINT1 = 0b00110001;
+  static constexpr uint8_t FLAGPOINT2 = 0b00110010;
+  static constexpr uint8_t FLAGPOINT3 = 0b00110100;
+  static constexpr uint8_t REGMODE = 0x07;
+  static constexpr uint8_t FLAGMODEHOLD = 0b00000010;
+  static constexpr uint8_t FLAGMODEREL = 0b00000100;
+  static constexpr uint8_t FLAGMODEAC = 0b00001000;
+  static constexpr uint8_t FLAGMODEDC = 0b00010000;
+  static constexpr uint8_t FLAGMODEAUTO = 0b00100000;
+  static constexpr uint8_t REGMINMAX = 0x08;
+  static constexpr uint8_t FLAGMIN = 0b00010000;
+  static constexpr uint8_t FLAGMAX = 0b00100000;
+  static constexpr uint8_t REGSCALE = 0x09;
+  static constexpr uint8_t FLAGSCALEDUTY = 0b00000010;
+  static constexpr uint8_t FLAGSCALEDIODE = 0b00000100;
+  static constexpr uint8_t FLAGSCALEBUZZ = 0b00001000;
+  static constexpr uint8_t FLAGSCALEMEGA = 0b00010000;
+  static constexpr uint8_t FLAGSCALEKILO = 0b00100000;
+  static constexpr uint8_t FLAGSCALEMILLI = 0b01000000;
+  static constexpr uint8_t FLAGSCALEMICRO = 0b10000000;
+  static constexpr uint8_t REGUNIT = 0x0a;
+  static constexpr uint8_t FLAGUNITFAHR = 0b00000001;
+  static constexpr uint8_t FLAGUNITGRAD = 0b00000010;
+  static constexpr uint8_t FLAGUNITNF = 0b00000100;
+  static constexpr uint8_t FLAGUNITHZ = 0b00001000;
+  static constexpr uint8_t FLAGUNITHFE = 0b00010000;
+  static constexpr uint8_t FLAGUNITOHM = 0b00100000;
+  static constexpr uint8_t FLAGUNITAMP = 0b01000000;
+  static constexpr uint8_t FLAGUNITVOLT = 0b10000000;
+
+  bool connected{false};
+  bool write_available{false};
+  bool is_plus{false};
+  bool low_battery{false};
+  bool overload{false};
+  bool has_reading{false};
+  uint8_t selected_button{1};
+  uint32_t last_notify_ms{0};
+
+  bool handle_notify(const std::vector<uint8_t> &data) {
+    if (data.size() > sizeof(this->raw_))
+      return false;
+    if (data.size() == 6 && data[1] >= 0xF0) {
+      memset(this->raw_, 0, sizeof(this->raw_));
+      memcpy(this->raw_, data.data(), data.size());
+      this->is_plus = true;
+      this->parse_plus_();
+    } else if (data.size() == 14 && data[12] == 0x0D && data[13] == 0x0A) {
+      memset(this->value_, 0, sizeof(this->value_));
+      memcpy(this->value_, data.data(), data.size());
+      this->is_plus = false;
+    } else {
+      ESP_LOGW(TAG, "Ignoring unexpected OWON frame length=%u", static_cast<unsigned>(data.size()));
+      return false;
+    }
+
+    this->overload = memcmp(this->value_, OVERLOAD_FRAME, sizeof(OVERLOAD_FRAME)) == 0;
+    this->display_value = this->calc_display_value_();
+    this->base_value = this->calc_base_value_();
+    this->has_reading = true;
+    this->last_notify_ms = millis();
+    return true;
+  }
+
+  void on_connect() {
+    this->connected = true;
+    this->write_available = true;
+  }
+
+  void on_disconnect() {
+    this->connected = false;
+    this->write_available = false;
+  }
+
+  float value() const { return this->display_value; }
+  float value_base() const { return this->base_value; }
+  bool negative() const { return (this->value_[REGPLUSMINUS] & FLAGMINUS) == FLAGMINUS; }
+  bool auto_range() const { return (this->value_[REGMODE] & FLAGMODEAUTO) == FLAGMODEAUTO; }
+  bool hold() const { return (this->value_[REGMODE] & FLAGMODEHOLD) == FLAGMODEHOLD; }
+  bool relative() const { return (this->value_[REGMODE] & FLAGMODEREL) == FLAGMODEREL; }
+  bool ac() const { return (this->value_[REGMODE] & FLAGMODEAC) == FLAGMODEAC; }
+  bool dc() const { return (this->value_[REGMODE] & FLAGMODEDC) == FLAGMODEDC; }
+  bool min_mode() const { return (this->value_[REGMINMAX] & FLAGMIN) == FLAGMIN; }
+  bool max_mode() const { return (this->value_[REGMINMAX] & FLAGMAX) == FLAGMAX; }
+  bool diode() const { return (this->value_[REGSCALE] & FLAGSCALEDIODE) == FLAGSCALEDIODE; }
+  bool continuity() const { return (this->value_[REGSCALE] & FLAGSCALEBUZZ) == FLAGSCALEBUZZ; }
+
+  const char *unit() const {
+    switch (this->value_[REGUNIT]) {
+      case FLAGUNITFAHR: return "°F";
+      case FLAGUNITGRAD: return "°C";
+      case FLAGUNITNF: return "nF";
+      case FLAGUNITHZ: return "Hz";
+      case FLAGUNITHFE: return "hFE";
+      case FLAGUNITOHM: return "Ω";
+      case FLAGUNITAMP: return "A";
+      case FLAGUNITVOLT: return "V";
+      default: return "";
+    }
+  }
+
+  const char *scale() const {
+    if ((this->value_[REGSCALE] & FLAGSCALEDUTY) == FLAGSCALEDUTY) return "%";
+    if ((this->value_[REGSCALE] & FLAGSCALEMEGA) == FLAGSCALEMEGA) return "M";
+    if ((this->value_[REGSCALE] & FLAGSCALEKILO) == FLAGSCALEKILO) return "k";
+    if ((this->value_[REGSCALE] & FLAGSCALEMILLI) == FLAGSCALEMILLI) return "m";
+    if ((this->value_[REGSCALE] & FLAGSCALEMICRO) == FLAGSCALEMICRO) return "µ";
+    return "";
+  }
+
+  std::string mode_text() const {
+    std::string out;
+    if (this->dc()) out += "DC ";
+    if (this->ac()) out += "AC ";
+    if (this->auto_range()) out += "AUTO ";
+    if (this->hold()) out += "HOLD ";
+    if (this->relative()) out += "REL ";
+    if (this->min_mode()) out += "MIN ";
+    if (this->max_mode()) out += "MAX ";
+    if (this->diode()) out += "DIODE ";
+    if (this->continuity()) out += "CONT ";
+    if (!out.empty()) out.pop_back();
+    return out;
+  }
+
+  std::string reading_text() const {
+    if (!this->connected) return "Disconnected";
+    if (!this->has_reading) return "Waiting for data";
+    if (this->overload) return "OL " + std::string(this->scale()) + this->unit();
+    char buf[48];
+    snprintf(buf, sizeof(buf), "%s%.4g %s%s", this->negative() ? "-" : "", std::fabs(this->display_value), this->scale(), this->unit());
+    return std::string(buf);
+  }
+
+  enum Kind { KIND_OTHER, KIND_VOLTAGE, KIND_CURRENT, KIND_RESISTANCE, KIND_FREQUENCY, KIND_CAPACITANCE, KIND_TEMP_C, KIND_TEMP_F, KIND_DUTY };
+  Kind kind() const {
+    if ((this->value_[REGSCALE] & FLAGSCALEDUTY) == FLAGSCALEDUTY) return KIND_DUTY;
+    switch (this->value_[REGUNIT]) {
+      case FLAGUNITVOLT: return KIND_VOLTAGE;
+      case FLAGUNITAMP: return KIND_CURRENT;
+      case FLAGUNITOHM: return KIND_RESISTANCE;
+      case FLAGUNITHZ: return KIND_FREQUENCY;
+      case FLAGUNITNF: return KIND_CAPACITANCE;
+      case FLAGUNITGRAD: return KIND_TEMP_C;
+      case FLAGUNITFAHR: return KIND_TEMP_F;
+      default: return KIND_OTHER;
+    }
+  }
+
+  const char *selected_button_name() const {
+    static const char *const names[] = {"SELECT", "RANGE", "HLD/LIG", "REL/BT", "HZ/DUTY", "MAX/MIN"};
+    uint8_t index = this->selected_button;
+    if (index < 1) index = 1;
+    if (index > 6) index = 6;
+    return names[index - 1];
+  }
+
+  void previous_button() {
+    if (this->selected_button > 1) this->selected_button--;
+  }
+  void next_button() {
+    if (this->selected_button < 6) this->selected_button++;
+  }
+
+  void render(esphome::display::Display &it, esphome::display::BaseFont *font,
+              esphome::display::BaseFont *value_font, int display_page = 0,
+              bool atorch_connected = false,
+              float atorch_voltage = NAN, float atorch_current = NAN, float atorch_power = NAN,
+              float atorch_capacity = NAN, float atorch_energy = NAN, float atorch_temperature = NAN)  {
+    const Color bg(0, 0, 0);
+    const Color fg(210, 210, 210);
+    // Chosen to map to a neutral dark gray in the RGB332 8-bit display palette.
+    const Color inactive(80, 80, 80);
+    const Color yellow(255, 220, 0);
+    const Color blue(0, 80, 255);
+    const Color cyan(0, 255, 255);
+    const Color magenta(255, 0, 255);
+    const Color red(255, 0, 0);
+    const Color green(0, 220, 0);
+    const Color orange(255, 165, 0);
+
+    if (display_page == 0) {
+        // --- PAGE 1: OWON Multimeter ---
+        it.fill(bg);
+        bool status_active = this->connected && this->has_reading;
+        this->draw_icon_(it, 12, 8, 16, 16, ACCU_BMP, status_active ? (this->low_battery ? red : green) : inactive);
+        this->draw_icon_(it, 46, 8, 16, 16, BLE_BMP, this->connected ? blue : inactive);
+        this->label_(it, font, 86, 8, "AUTO", status_active && this->auto_range() ? fg : inactive);
+        this->label_(it, font, 138, 8, "MAX", status_active && this->max_mode() ? red : inactive);
+        this->label_(it, font, 178, 8, "MIN", status_active && this->min_mode() ? green : inactive);
+        this->draw_icon_(it, 218, 8, 16, 16, HOLD_BMP, status_active && this->hold() ? blue : inactive);
+        this->draw_icon_(it, 244, 8, 16, 16, REL_BMP, status_active && this->relative() ? Color(128, 128, 0) : inactive);
+        this->draw_icon_(it, 270, 8, 16, 16, DIODE_BMP, status_active && this->diode() ? magenta : inactive);
+        this->draw_icon_(it, 296, 8, 16, 16, BUZZ_BMP, status_active && this->continuity() ? orange : inactive);
+
+        this->label_(it, font, 8, 104, "DC", status_active && this->dc() ? cyan : inactive);
+        this->label_(it, font, 8, 124, "AC", status_active && this->ac() ? magenta : inactive);
+
+        if (!this->connected) {
+        this->draw_digits_(it, "----", false, inactive);
+        it.print(160, 148, font, inactive, esphome::display::TextAlign::CENTER, "scan/connect");
+        } else if (!this->has_reading) {
+        this->draw_digits_(it, "8888", false, inactive);
+        it.print(160, 148, font, inactive, esphome::display::TextAlign::CENTER, "waiting");
+        } else if (this->overload) {
+        this->draw_digits_(it, " OL ", false, fg);
+        } else {
+        char d[5];
+        d[0] = this->digit_char_(REGDIG1);
+        d[1] = this->digit_char_(REGDIG2);
+        d[2] = this->digit_char_(REGDIG3);
+        d[3] = this->digit_char_(REGDIG4);
+        d[4] = 0;
+        this->draw_digits_(it, d, this->negative(), fg);
+        this->draw_decimal_points_(it, fg);
+        }
+
+        if (status_active) {
+        std::string unit_line = std::string(this->scale()) + this->unit();
+        it.print(316, 141, font, yellow, esphome::display::TextAlign::BOTTOM_RIGHT, unit_line.c_str());
+        }
+
+        bool bargraph_active = status_active && !this->overload;
+        this->draw_bargraph_(it, bargraph_active ? this->digits_from_buffer_() : 0, bargraph_active);
+        it.filled_rectangle(34, 212, 40, 24, this->write_available ? fg : inactive);
+        it.filled_rectangle(108, 212, 100, 24, this->write_available ? fg : inactive);
+        it.filled_rectangle(242, 212, 40, 24, this->write_available ? fg : inactive);
+        it.print(54, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, "<");
+        it.print(158, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, this->selected_button_name());
+        it.print(262, 216, font, bg, esphome::display::TextAlign::TOP_CENTER, ">");
+    } else {
+        // --- PAGE 2: Atorch DL24 DC load ---
+        it.fill(bg);
+        const Color panel_active(18, 24, 32);
+        const Color panel_inactive(12, 12, 12);
+        const Color panel_dim(10, 14, 20);
+        const Color border_active(55, 70, 86);
+        const Color border_inactive(42, 42, 42);
+        const Color white(245, 245, 245);
+        const Color dim_value(110, 110, 110);
+        const Color dim_accent(65, 65, 65);
+        const Color panel = atorch_connected ? panel_active : panel_inactive;
+        const Color border = atorch_connected ? border_active : border_inactive;
+        const Color value_color = atorch_connected ? white : dim_value;
+        const Color voltage_color = atorch_connected ? cyan : dim_accent;
+        const Color current_color = atorch_connected ? orange : dim_accent;
+        const Color power_color = atorch_connected ? yellow : dim_accent;
+        const Color temp_color = atorch_connected ? magenta : dim_accent;
+        const Color header_color = atorch_connected ? cyan : dim_value;
+
+        char voltage_text[24];
+        char current_text[24];
+        char power_text[24];
+        char capacity_text[24];
+        char energy_text[24];
+        char temperature_text[24];
+        this->format_metric_(voltage_text, sizeof(voltage_text), atorch_voltage, "V", 2);
+        this->format_metric_(current_text, sizeof(current_text), atorch_current, "A", 3);
+        this->format_metric_(power_text, sizeof(power_text), atorch_power, "W", 2);
+        this->format_metric_(capacity_text, sizeof(capacity_text), atorch_capacity, "Ah", 3);
+        this->format_metric_(energy_text, sizeof(energy_text), atorch_energy, "Wh", 3);
+        this->format_metric_(temperature_text, sizeof(temperature_text), atorch_temperature, "°C", 1);
+
+        it.filled_rectangle(0, 0, 320, 30, atorch_connected ? panel_dim : panel_inactive);
+        it.print(10, 7, font, header_color, esphome::display::TextAlign::TOP_LEFT, "ATORCH DL24");
+        if (atorch_connected) {
+          this->draw_icon_(it, 152, 7, 16, 16, BLE_BMP, blue);
+        }
+        it.print(310, 7, font, inactive, esphome::display::TextAlign::TOP_RIGHT, "DC LOAD");
+
+        this->draw_metric_card_(it, font, value_font, 10, 42, 145, 76, "VOLTAGE", voltage_text, voltage_color, panel, border, value_color);
+        this->draw_metric_card_(it, font, value_font, 165, 42, 145, 76, "CURRENT", current_text, current_color, panel, border, value_color);
+        this->draw_metric_card_(it, font, value_font, 10, 128, 145, 76, "POWER", power_text, power_color, panel, border, value_color);
+        this->draw_metric_card_(it, font, value_font, 165, 128, 145, 76, "TEMP", temperature_text, temp_color, panel, border, value_color);
+
+        it.filled_rectangle(10, 212, 300, 22, atorch_connected ? panel_dim : panel_inactive);
+        it.filled_rectangle(10, 212, 300, 1, border);
+        it.filled_rectangle(10, 233, 300, 1, border);
+        it.filled_rectangle(10, 212, 1, 22, border);
+        it.filled_rectangle(309, 212, 1, 22, border);
+        it.print(20, 216, font, inactive, esphome::display::TextAlign::TOP_LEFT, "CAP");
+        it.print(64, 216, font, value_color, esphome::display::TextAlign::TOP_LEFT, capacity_text);
+        it.print(170, 216, font, inactive, esphome::display::TextAlign::TOP_LEFT, "ENERGY");
+        it.print(306, 216, font, value_color, esphome::display::TextAlign::TOP_RIGHT, energy_text);
+    }
+  }
+
+ private:
+  uint8_t raw_[14]{};
+  uint8_t value_[14]{};
+  float display_value{NAN};
+  float base_value{NAN};
+  static constexpr uint8_t OVERLOAD_FRAME[5] = {0x2B, 0x3F, 0x30, 0x3A, 0x3F};
+
+  uint16_t digits_from_buffer_() const {
+    uint16_t out = 0;
+    if (this->value_[REGDIG1] >= '0' && this->value_[REGDIG1] <= '9') out += (this->value_[REGDIG1] - '0') * 1000;
+    if (this->value_[REGDIG2] >= '0' && this->value_[REGDIG2] <= '9') out += (this->value_[REGDIG2] - '0') * 100;
+    if (this->value_[REGDIG3] >= '0' && this->value_[REGDIG3] <= '9') out += (this->value_[REGDIG3] - '0') * 10;
+    if (this->value_[REGDIG4] >= '0' && this->value_[REGDIG4] <= '9') out += (this->value_[REGDIG4] - '0');
+    return out;
+  }
+
+  float calc_display_value_() const {
+    if (this->overload) return NAN;
+
+    if (this->is_plus) {
+      uint16_t pair1 = static_cast<uint16_t>(this->raw_[0]) | (static_cast<uint16_t>(this->raw_[1]) << 8);
+      uint8_t decimal = pair1 & 0x07;
+      if (decimal >= 7) return NAN;
+
+      uint16_t pair3 = static_cast<uint16_t>(this->raw_[4]) | (static_cast<uint16_t>(this->raw_[5]) << 8);
+      bool negative = pair3 >= 0x7FFF;
+      uint16_t digits = negative ? (pair3 & 0x7FFF) : pair3;
+      float v = static_cast<float>(digits) / std::pow(10.0f, decimal);
+      return negative ? -v : v;
+    }
+
+    uint8_t decimal = 0;
+    switch (this->value_[REGPOINT] & 0x07) {
+      case 0b001: decimal = 1; break;
+      case 0b010: decimal = 2; break;
+      case 0b100: decimal = 3; break;
+      default: break;
+    }
+    float v = static_cast<float>(this->digits_from_buffer_()) / std::pow(10.0f, decimal);
+    return this->negative() ? -v : v;
+  }
+
+  float calc_base_value_() const {
+    if (std::isnan(this->display_value)) return NAN;
+    if (this->value_[REGUNIT] == FLAGUNITNF) return this->display_value * 1e-9f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMEGA) == FLAGSCALEMEGA) return this->display_value * 1e6f;
+    if ((this->value_[REGSCALE] & FLAGSCALEKILO) == FLAGSCALEKILO) return this->display_value * 1e3f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMILLI) == FLAGSCALEMILLI) return this->display_value * 1e-3f;
+    if ((this->value_[REGSCALE] & FLAGSCALEMICRO) == FLAGSCALEMICRO) return this->display_value * 1e-6f;
+    return this->display_value;
+  }
+
+  void parse_plus_() {
+    memset(this->value_, 0, sizeof(this->value_));
+    this->value_[5] = 0x20;
+    this->value_[12] = 0x0D;
+    this->value_[13] = 0x0A;
+
+    uint16_t pair1 = static_cast<uint16_t>(this->raw_[0]) | (static_cast<uint16_t>(this->raw_[1]) << 8);
+    uint8_t function = (pair1 >> 6) & 0x0F;
+    uint8_t scale = (pair1 >> 3) & 0x07;
+    uint8_t decimal = pair1 & 0x07;
+
+    switch (decimal) {
+      case 0: this->value_[REGPOINT] = FLAGPOINT0; break;
+      case 1: this->value_[REGPOINT] = FLAGPOINT3; break;
+      case 2: this->value_[REGPOINT] = FLAGPOINT2; break;
+      case 3: this->value_[REGPOINT] = FLAGPOINT1; break;
+      default: break;
+    }
+
+    switch (function) {
+      case 0: this->value_[REGUNIT] |= FLAGUNITVOLT; this->value_[REGMODE] |= FLAGMODEDC; break;
+      case 1: this->value_[REGUNIT] |= FLAGUNITVOLT; this->value_[REGMODE] |= FLAGMODEAC; break;
+      case 2: this->value_[REGUNIT] |= FLAGUNITAMP; this->value_[REGMODE] |= FLAGMODEDC; break;
+      case 3: this->value_[REGUNIT] |= FLAGUNITAMP; this->value_[REGMODE] |= FLAGMODEAC; break;
+      case 4: this->value_[REGUNIT] |= FLAGUNITOHM; break;
+      case 5: this->value_[REGUNIT] |= FLAGUNITNF; break;
+      case 6: this->value_[REGUNIT] |= FLAGUNITHZ; break;
+      case 7: this->value_[REGSCALE] |= FLAGSCALEDUTY; break;
+      case 8: this->value_[REGUNIT] |= FLAGUNITGRAD; break;
+      case 9: this->value_[REGUNIT] |= FLAGUNITFAHR; break;
+      case 10: this->value_[REGSCALE] |= FLAGSCALEDIODE; break;
+      case 11: this->value_[REGSCALE] |= FLAGSCALEBUZZ; break;
+      case 12: this->value_[REGUNIT] |= FLAGUNITHFE; break;
+      default: break;
+    }
+
+    switch (scale) {
+      case 2: this->value_[REGSCALE] |= FLAGSCALEMICRO; break;
+      case 3: this->value_[REGSCALE] |= FLAGSCALEMILLI; break;
+      case 5: this->value_[REGSCALE] |= FLAGSCALEKILO; break;
+      case 6: this->value_[REGSCALE] |= FLAGSCALEMEGA; break;
+      default: break;
+    }
+
+    uint16_t pair2 = static_cast<uint16_t>(this->raw_[2]) | (static_cast<uint16_t>(this->raw_[3]) << 8);
+    if (pair2 & (1 << 0)) this->value_[REGMODE] |= FLAGMODEHOLD;
+    if (pair2 & (1 << 1)) this->value_[REGMODE] |= FLAGMODEREL;
+    if (pair2 & (1 << 2)) this->value_[REGMODE] |= FLAGMODEAUTO;
+    this->low_battery = (pair2 & (1 << 3)) != 0;
+    if (pair2 & (1 << 4)) this->value_[REGMINMAX] |= FLAGMIN;
+    if (pair2 & (1 << 5)) this->value_[REGMINMAX] |= FLAGMAX;
+
+    uint16_t pair3 = static_cast<uint16_t>(this->raw_[4]) | (static_cast<uint16_t>(this->raw_[5]) << 8);
+    if (decimal < 7) {
+      uint16_t digits = pair3;
+      if (pair3 < 0x7FFF) {
+        this->value_[REGPLUSMINUS] = FLAGPLUS;
+      } else {
+        this->value_[REGPLUSMINUS] = FLAGMINUS;
+        digits = pair3 & 0x7FFF;
+      }
+      this->value_[REGDIG1] = '0' + ((digits / 1000) % 10);
+      this->value_[REGDIG2] = '0' + ((digits / 100) % 10);
+      this->value_[REGDIG3] = '0' + ((digits / 10) % 10);
+      this->value_[REGDIG4] = '0' + (digits % 10);
+    } else {
+      memcpy(this->value_, OVERLOAD_FRAME, sizeof(OVERLOAD_FRAME));
+    }
+  }
+
+  char digit_char_(uint8_t reg) const {
+    uint8_t c = this->value_[reg];
+    return (c >= '0' && c <= '9') ? static_cast<char>(c) : ' ';
+  }
+
+  void format_metric_(char *buffer, size_t size, float value, const char *unit, uint8_t decimals) const {
+    if (!std::isfinite(value)) {
+      snprintf(buffer, size, "-- %s", unit);
+      return;
+    }
+    char format[12];
+    snprintf(format, sizeof(format), "%%.%uf %%s", decimals);
+    snprintf(buffer, size, format, value, unit);
+  }
+
+  void draw_metric_card_(Display &it, esphome::display::BaseFont *label_font, esphome::display::BaseFont *value_font,
+                         int x, int y, int w, int h, const char *title, const char *value,
+                         Color accent, Color fill, Color border, Color value_color) {
+    const Color bg(0, 0, 0);
+    const Color inactive(90, 100, 110);
+    it.filled_rectangle(x, y, w, h, fill);
+    it.filled_rectangle(x, y, w, 2, accent);
+    it.filled_rectangle(x, y + h - 1, w, 1, border);
+    it.filled_rectangle(x, y, 1, h, border);
+    it.filled_rectangle(x + w - 1, y, 1, h, border);
+    it.print(x + 10, y + 9, label_font, inactive, esphome::display::TextAlign::TOP_LEFT, title);
+    it.print(x + w / 2, y + 43, value_font, value_color, esphome::display::TextAlign::CENTER, value);
+    it.filled_rectangle(x + 10, y + h - 11, w - 20, 3, bg);
+    it.filled_rectangle(x + 10, y + h - 11, w - 20, 1, accent);
+  }
+
+  void label_(Display &it, esphome::display::BaseFont *font, int x, int y, const char *text, Color color) {
+    it.print(x, y, font, color, esphome::display::TextAlign::TOP_LEFT, text);
+  }
+
+  void draw_digits_(Display &it, const char *text, bool negative, Color color) {
+    if (negative) this->draw_segment_(it, 8, 83, 26, 9, true, color);
+    constexpr int digit_x = 40;
+    constexpr int digit_y = 35;
+    constexpr int digit_w = 50;
+    constexpr int digit_h = 106;
+    constexpr int digit_distance = 64;
+    for (int i = 0; i < 4; i++) {
+      this->draw_seven_segment_(it, digit_x + i * digit_distance, digit_y, digit_w, digit_h, text[i], color);
+    }
+  }
+
+  void draw_decimal_points_(Display &it, Color color) {
+    uint8_t p = this->value_[REGPOINT];
+    if ((p & FLAGPOINT1) == FLAGPOINT1) it.filled_rectangle(95, 135, 8, 10, color);
+    if ((p & FLAGPOINT2) == FLAGPOINT2) it.filled_rectangle(159, 135, 8, 10, color);
+    if ((p & FLAGPOINT3) == FLAGPOINT3) it.filled_rectangle(223, 135, 8, 10, color);
+  }
+
+  void draw_segment_(Display &it, int x, int y, int w, int h, bool horizontal, Color color) {
+    if (horizontal) {
+      int cap = h / 2;
+      it.filled_rectangle(x + cap, y, w - 2 * cap, h +1, color);
+      it.filled_triangle(x, y + cap, x + cap, y, x + cap, y + h, color);
+      it.filled_triangle(x + w, y + cap, x + w - cap, y, x + w - cap, y + h, color);
+    } else {
+      int cap = w / 2;
+      it.filled_rectangle(x, y + cap, w +1, h - 2 * cap, color);
+      it.filled_triangle(x + cap, y, x, y + cap, x + w, y + cap, color);
+      it.filled_triangle(x + cap, y + h, x, y + h - cap, x + w, y + h - cap, color);
+    }
+  }
+
+  void draw_icon_(Display &it, int x, int y, int w, int h, const uint8_t *data, Color color) {
+    for (int row = 0; row < h; row++) {
+      for (int col = 0; col < w; col++) {
+        uint8_t byte = data[row * ((w + 7) / 8) + (col / 8)];
+        if ((byte & (0x80 >> (col % 8))) != 0) {
+          it.draw_pixel_at(x + col, y + row, color);
+        }
+      }
+    }
+  }
+
+  void draw_seven_segment_(Display &it, int x, int y, int w, int h, char ch, Color color) {
+    bool a=false,b=false,c=false,d=false,e=false,f=false,g=false;
+    switch (ch) {
+      case '0': a=b=c=d=e=f=true; break;
+      case '1': b=c=true; break;
+      case '2': a=b=d=e=g=true; break;
+      case '3': a=b=c=d=g=true; break;
+      case '4': b=c=f=g=true; break;
+      case '5': a=c=d=f=g=true; break;
+      case '6': a=c=d=e=f=g=true; break;
+      case '7': a=b=c=true; break;
+      case '8': a=b=c=d=e=f=g=true; break;
+      case '9': a=b=c=d=f=g=true; break;
+      case 'O': a=b=c=d=e=f=true; break;
+      case 'L': d=e=f=true; break;
+      case '-': g=true; break;
+      default: break;
+    }
+    int t = 10;
+    int half = h / 2;
+    int gap = 1;
+
+    int top_y = y;
+    int mid_y = y + half - t / 2;
+    int bot_y = y + h - t;
+
+    int upper_v_y = top_y + t + gap;
+    int upper_v_h = mid_y - gap - upper_v_y;
+    int lower_v_y = mid_y + t + gap;
+    int lower_v_h = bot_y - gap - lower_v_y;
+
+    if (a) this->draw_segment_(it, x + t / 2, top_y, w - t, t, true, color);
+    if (b && upper_v_h > 0) this->draw_segment_(it, x + w - t, upper_v_y, t, upper_v_h, false, color);
+    if (c && lower_v_h > 0) this->draw_segment_(it, x + w - t, lower_v_y, t, lower_v_h, false, color);
+    if (d) this->draw_segment_(it, x + t / 2, bot_y, w - t, t, true, color);
+    if (e && lower_v_h > 0) this->draw_segment_(it, x, lower_v_y, t, lower_v_h, false, color);
+    if (f && upper_v_h > 0) this->draw_segment_(it, x, upper_v_y, t, upper_v_h, false, color);
+    if (g) this->draw_segment_(it, x + t / 2, mid_y, w - t, t, true, color);
+  }
+
+  void draw_bargraph_(Display &it, uint16_t digits, bool active) {
+    const Color fg(255, 255, 255);
+    const Color inactive(80, 80, 80);
+    uint16_t mapped = active ? static_cast<uint16_t>(digits * 240 / 6000) : 0;
+    if (mapped > 240) mapped = 240;
+    for (uint16_t i = 0; i <= 240; i += 4) {
+      Color col = (active && i <= mapped) ? fg : inactive;
+      int h = (i % 40 == 0) ? 20 : ((i % 20 == 0) ? 15 : 10);
+      it.vertical_line(40 + i, 185 - h, h, col);
+    }
+    it.horizontal_line(35, 185, 250, inactive);
+  }
+};
+
+}  // namespace owon_b35t
+
+static owon_b35t::Meter owon_meter;
@@ -0,0 +1,628 @@
+# Connects to an OWON BT35T/BT35T+ multimeter and an Atorch DL24 dc-load and mirrors their
+# displays. Also sends those values to Home Assistant for logging and dashboard display.
+# Also exposes actionable buttons to HA to control the devices.
+#
+# Derived work based on https://github.com/reaper7/M5Stack_BLE_client_Owon_B35T by reaper7.
+# AI (ChatGPT (GPT5.5) has been used to adopt the Arduino sketch to ESPHome
+# Ported to M5Stack Core2 due to memory constraints.
+# Integrated Atorch BLE proxy functionality from https://github.com/syssi/esphome-atorch-dl24 by syssi.
+# Soft buttons work as indicated for OWON meter. Left/right so select action, middle to execute.
+# Long-press is supported. Display switches to last connected device, tap center of screen to
+# switch. The dc-load has no on-device buttons, but both are available from HA.
+
+substitutions:
+  name: "lab-ble-proxy"
+  friendly_name: "Lab BLE Proxy"
+  device_description: "M5Stack Core2 BLE client for OWON B35T/B35T+ multimeter and Atorch DL24 DC load"
+  owon_mac_address: !secret owon_b35t_mac_address
+  dl24_mac_address: !secret dl24_mac_address
+  external_components_source: github://syssi/esphome-atorch-dl24@main
+  atorch_project_version: "2.1.0"
+
+esphome:
+  name: ${name}
+  friendly_name: ${friendly_name}
+  comment: ${device_description}
+  min_version: 2024.6.0
+  includes:
+    - lab-ble-proxy.h
+  on_boot:
+    priority: 850
+    then:
+      - lambda: |-
+          owon_b35t::core2_axp192_init(id(core2_i2c));
+  project:
+    name: "custom.lab-ble-proxy-m5stack-core2"
+    version: "1.0"
+
+esp32:
+  board: m5stack-core2
+  flash_size: 16MB
+  framework:
+    type: esp-idf
+    advanced:
+      minimum_chip_revision: "3.1"
+      sram1_as_iram: true
+
+psram:
+  mode: quad
+  speed: 80MHz
+
+external_components:
+  - source: ${external_components_source}
+    refresh: 0s
+
+logger:
+  level: INFO
+
+api:
+  encryption:
+    key: !secret apikey
+
+ota:
+  platform: esphome
+  password: !secret ota
+
+network:
+  enable_ipv6: true
+
+wifi:
+  ssid: "Voltage-legacy"
+  password: !secret voltage_legacy_psk
+  #use_address: ${name}.home
+  power_save_mode: none
+  fast_connect: on
+  min_auth_mode: WPA2
+  ap:
+    ssid: "Lab BLE Proxy Fallback Hotspot"
+    password: !secret fallback_psk
+
+captive_portal:
+
+globals:
+  - id: display_page
+    type: int
+    initial_value: "0"
+    restore_value: no
+  - id: atorch_connected
+    type: bool
+    initial_value: "false"
+    restore_value: no
+
+script:
+  - id: wake_backlight
+    mode: restart
+    then:
+      - script.stop: backlight_idle
+      - light.turn_on:
+          id: backlight
+          brightness: 100%
+  - id: backlight_idle
+    mode: restart
+    then:
+      - delay: 2min
+      - if:
+          condition:
+            lambda: |-
+              return !owon_meter.connected && !id(atorch_connected);
+          then:
+            - light.turn_on:
+                id: backlight
+                brightness: 50%
+      - delay: 3min
+      - if:
+          condition:
+            lambda: |-
+              return !owon_meter.connected && !id(atorch_connected);
+          then:
+            - light.turn_off: backlight
+
+interval:
+  - interval: 10s
+    then:
+      - lambda: |-
+          ESP_LOGI("mem", "heap free=%u min_free=%u internal_free=%u internal_largest=%u dma_free=%u dma_largest=%u psram_free=%u psram_largest=%u",
+                   static_cast<unsigned>(esp_get_free_heap_size()),
+                   static_cast<unsigned>(esp_get_minimum_free_heap_size()),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_INTERNAL)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL)),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_DMA)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_DMA)),
+                   static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)),
+                   static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_SPIRAM)));
+
+esp32_ble_tracker:
+  scan_parameters:
+    active: true
+    continuous: true
+
+ble_client:
+  - mac_address: ${owon_mac_address}
+    id: owon_ble_client
+    on_connect:
+      then:
+        - script.execute: wake_backlight
+        - lambda: |-
+            owon_meter.on_connect();
+            id(display_page) = 0;
+            id(lcd).update();
+    on_disconnect:
+      then:
+        - lambda: |-
+            owon_meter.on_disconnect();
+            if (id(display_page) == 0 && id(atorch_connected)) {
+              id(display_page) = 1;
+            }
+            id(lcd).update();
+        - if:
+            condition:
+              lambda: |-
+                return !owon_meter.connected && !id(atorch_connected);
+            then:
+              - script.execute: backlight_idle
+
+  - mac_address: ${dl24_mac_address}
+    id: atorch_ble_client
+    on_connect:
+      then:
+        - script.execute: wake_backlight
+        - lambda: |-
+            id(atorch_connected) = true;
+            id(display_page) = 1;
+            id(lcd).update();
+    on_disconnect:
+      then:
+        - lambda: |-
+            id(atorch_connected) = false;
+            if (id(display_page) == 1 && owon_meter.connected) {
+              id(display_page) = 0;
+            }
+            id(lcd).update();
+        - if:
+            condition:
+              lambda: |-
+                return !owon_meter.connected && !id(atorch_connected);
+            then:
+              - script.execute: backlight_idle
+
+atorch_dl24:
+  - id: atorch0
+    ble_client_id: atorch_ble_client
+    check_crc: false
+    throttle: 0s
+
+spi:
+  clk_pin: GPIO18
+  mosi_pin: GPIO23
+
+i2c:
+  id: core2_i2c
+  sda: GPIO21
+  scl: GPIO22
+  scan: true
+
+output:
+  - platform: template
+    type: float
+    id: lcd_backlight
+    write_action:
+      - lambda: |-
+          owon_b35t::core2_axp192_set_backlight(state);
+
+light:
+  - platform: monochromatic
+    output: lcd_backlight
+    name: "${friendly_name} Backlight"
+    id: backlight
+    restore_mode: ALWAYS_ON
+
+font:
+  - file: "fonts/Roboto-Regular.ttf"
+    id: meter_font
+    size: 15
+    glyphs:
+      [
+        " ",
+        "!",
+        "%",
+        "+",
+        "-",
+        ".",
+        "/",
+        ":",
+        "0",
+        "1",
+        "2",
+        "3",
+        "4",
+        "5",
+        "6",
+        "7",
+        "8",
+        "9",
+        "<",
+        ">",
+        "A",
+        "B",
+        "C",
+        "D",
+        "E",
+        "F",
+        "G",
+        "H",
+        "I",
+        "L",
+        "M",
+        "N",
+        "O",
+        "P",
+        "R",
+        "S",
+        "T",
+        "U",
+        "V",
+        "W",
+        "X",
+        "Y",
+        "Z",
+        "a",
+        "b",
+        "c",
+        "d",
+        "e",
+        "f",
+        "g",
+        "h",
+        "i",
+        "k",
+        "l",
+        "m",
+        "n",
+        "o",
+        "p",
+        "r",
+        "s",
+        "t",
+        "u",
+        "v",
+        "w",
+        "y",
+        "z",
+        "°",
+        "µ",
+        "Ω",
+      ]
+
+  - file: "fonts/Roboto-Medium.ttf"
+    id: atorch_value_font
+    size: 22
+    glyphs:
+      [
+        " ",
+        "+",
+        "-",
+        ".",
+        "0",
+        "1",
+        "2",
+        "3",
+        "4",
+        "5",
+        "6",
+        "7",
+        "8",
+        "9",
+        "A",
+        "C",
+        "V",
+        "W",
+        "h",
+        "°",
+      ]
+
+display:
+  - platform: mipi_spi
+    id: lcd
+    model: M5CORE2
+    update_interval: 500ms
+    lambda: |-
+      owon_meter.render(
+        it,
+        id(meter_font),
+        id(atorch_value_font),
+        id(display_page),
+        id(atorch_connected),
+        id(atorch_voltage).has_state() ? id(atorch_voltage).state : NAN,
+        id(atorch_current).has_state() ? id(atorch_current).state : NAN,
+        id(atorch_power).has_state() ? id(atorch_power).state : NAN,
+        id(atorch_capacity).has_state() ? id(atorch_capacity).state : NAN,
+        id(atorch_energy_calculated).has_state() ? id(atorch_energy_calculated).state : NAN,
+        id(atorch_temperature).has_state() ? id(atorch_temperature).state : NAN
+      );
+
+touchscreen:
+  - platform: ft63x6
+    id: touch
+    display: lcd
+    on_touch:
+      then:
+        - script.execute: wake_backlight
+        - if:
+            condition:
+              lambda: |-
+                return !owon_meter.connected && !id(atorch_connected);
+            then:
+              - script.execute: backlight_idle
+
+binary_sensor:
+  - platform: touchscreen
+    touchscreen_id: touch
+    id: btn_toggle_page
+    x_min: 70
+    x_max: 250
+    y_min: 45
+    y_max: 195
+    on_press:
+      then:
+        - lambda: |-
+            id(display_page) = 1 - id(display_page);
+            id(lcd).update();
+  - platform: touchscreen
+    id: button_a
+    touchscreen_id: touch
+    x_min: 34
+    x_max: 74
+    y_min: 212
+    y_max: 240
+    internal: true
+    on_press:
+      then:
+        - lambda: |-
+            owon_meter.previous_button();
+  - platform: touchscreen
+    id: button_b
+    touchscreen_id: touch
+    x_min: 108
+    x_max: 208
+    y_min: 212
+    y_max: 240
+    internal: true
+    on_click:
+      - min_length: 50ms
+        max_length: 1500ms
+        then:
+          - logger.log:
+              level: INFO
+              format: "OWON short press: %s"
+              args: ["owon_meter.selected_button_name()"]
+          - ble_client.ble_write:
+              id: owon_ble_client
+              service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+              characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+              value: !lambda |-
+                std::vector<uint8_t> data = {owon_meter.selected_button, 0x01};
+                return data;
+      - min_length: 1500ms
+        max_length: 5000ms
+        then:
+          - logger.log:
+              level: INFO
+              format: "OWON long press: %s"
+              args: ["owon_meter.selected_button_name()"]
+          - ble_client.ble_write:
+              id: owon_ble_client
+              service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+              characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+              value: !lambda |-
+                uint8_t press_type = (owon_meter.selected_button == 1 || owon_meter.selected_button == 5) ? 0x01 : 0x00;
+                std::vector<uint8_t> data = {owon_meter.selected_button, press_type};
+                return data;
+  - platform: touchscreen
+    id: button_c
+    touchscreen_id: touch
+    x_min: 242
+    x_max: 282
+    y_min: 212
+    y_max: 240
+    internal: true
+    on_press:
+      then:
+        - lambda: |-
+            owon_meter.next_button();
+
+  - platform: template
+    name: "${friendly_name} OWON Connected"
+    icon: "mdi:bluetooth-connect"
+    lambda: |-
+      return owon_meter.connected;
+  - platform: template
+    name: "${friendly_name} OWON Overload"
+    icon: "mdi:debug-step-over"
+    lambda: |-
+      return owon_meter.overload;
+  - platform: template
+    name: "${friendly_name} OWON Low Battery"
+    icon: "mdi:battery-low"
+    lambda: |-
+      return owon_meter.low_battery;
+  - platform: template
+    name: "${friendly_name} Atorch Connected"
+    device_class: connectivity
+    icon: "mdi:bluetooth-connect"
+    lambda: |-
+      return id(atorch_connected);
+
+sensor:
+  - platform: ble_client
+    type: characteristic
+    ble_client_id: owon_ble_client
+    id: owon_notify_source
+    internal: true
+    service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+    characteristic_uuid: "0000fff4-0000-1000-8000-00805f9b34fb"
+    notify: true
+    update_interval: never
+    lambda: |-
+      owon_meter.handle_notify(x);
+      return owon_meter.value();
+
+  - platform: wifi_signal
+    name: "${friendly_name} WiFi Signal"
+    update_interval: 60s
+
+  - platform: atorch_dl24
+    atorch_dl24_id: atorch0
+    voltage:
+      name: "${friendly_name} Atorch Voltage"
+      id: atorch_voltage
+    current:
+      name: "${friendly_name} Atorch Current"
+      id: atorch_current
+    power:
+      name: "${friendly_name} Atorch Power"
+      id: atorch_power
+    capacity:
+      name: "${friendly_name} Atorch Capacity"
+      id: atorch_capacity
+    temperature:
+      name: "${friendly_name} Atorch Temperature"
+      id: atorch_temperature
+    dim_backlight:
+      name: "${friendly_name} Atorch Dim Backlight"
+      id: atorch_dim_backlight
+
+  - platform: integration
+    name: "${friendly_name} Atorch Energy"
+    id: atorch_energy_calculated
+    sensor: atorch_power
+    time_unit: h
+    unit_of_measurement: "Wh"
+    icon: "mdi:lightning-bolt"
+    device_class: energy
+    state_class: total_increasing
+    accuracy_decimals: 3
+    restore: true
+    integration_method: trapezoid
+
+text_sensor:
+  - platform: template
+    name: "${friendly_name} OWON Reading"
+    update_interval: 1s
+    icon: "mdi:gauge"
+    lambda: |-
+      return owon_meter.reading_text();
+  - platform: template
+    name: "${friendly_name} OWON Unit"
+    update_interval: 1s
+    icon: "mdi:ruler"
+    lambda: |-
+      return std::string(owon_meter.scale()) + owon_meter.unit();
+  - platform: template
+    name: "${friendly_name} OWON Mode"
+    icon: "mdi:knob"
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.mode_text();
+
+button:
+  - platform: atorch_dl24
+    atorch_dl24_id: atorch0
+    reset_energy:
+      name: "${friendly_name} Atorch Reset Energy"
+      on_press:
+        - sensor.integration.reset: atorch_energy_calculated
+    reset_capacity:
+      name: "${friendly_name} Atorch Reset Capacity"
+    reset_runtime:
+      name: "${friendly_name} Atorch Reset Runtime"
+    reset_all:
+      name: "${friendly_name} Atorch Reset All"
+      on_press:
+        - sensor.integration.reset: atorch_energy_calculated
+    usb_plus:
+      name: "${friendly_name} Atorch Plus"
+    usb_minus:
+      name: "${friendly_name} Atorch Minus"
+    setup:
+      name: "${friendly_name} Atorch Setup"
+    enter:
+      name: "${friendly_name} Atorch Enter"
+  - platform: template
+    name: "OWON SELECT"
+    id: owon_btn_select
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({1, 0x01});"
+
+  - platform: template
+    name: "OWON RANGE"
+    id: owon_btn_range
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({2, 0x01});"
+
+  - platform: template
+    name: "OWON HOLD "
+    id: owon_btn_hold
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({3, 0x01});"
+
+  - platform: template
+    name: "OWON LIGHT"
+    id: owon_btn_light
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({3, 0x00});"
+
+  - platform: template
+    name: "OWON RELATIVE"
+    id: owon_btn_rel
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({4, 0x01});"
+
+  - platform: template
+    name: "OWON BT"
+    id: owon_btn_bt
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({4, 0x00});"
+
+  - platform: template
+    name: "OWON HZ | DUTY"
+    id: owon_btn_hz
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({5, 0x01});"
+
+  - platform: template
+    name: "OWON MAX | MIN"
+    id: owon_btn_maxmin
+    on_press:
+      - ble_client.ble_write:
+          id: owon_ble_client
+          service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
+          characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
+          value: !lambda "return std::vector<uint8_t>({6, 0x01});"
@@ -53,11 +53,16 @@ esp32:
  board: nodemcu-32s
  framework:
    type: esp-idf
+    advanced: 
+      minimum_chip_revision: "3.0"
+
+network:
+  enable_ipv6: true

 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: ${name}.home  
+  # use_address: ${name}.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -26,12 +26,15 @@ ota:
    id: ota_esphome
    password: !secret ota

+network:
+  enable_ipv6: true
+
 wifi:
  on_connect:
    - delay: 5s  # Gives time for improv results to be transmitted
  ssid: Voltage-legacy
  password: !secret voltage_legacy_psk
-  use_address: ${name}.home
+  #use_address: ${name}.home
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -50,10 +50,13 @@ esphome:
 esp8266:
  board: esp12e

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: riden-labornetzteil-18a.home  
+  #use_address: riden-labornetzteil-18a.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -50,10 +50,13 @@ esphome:
 esp8266:
  board: esp12e

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: riden-labornetzteil-6a.home  
+  #use_address: riden-labornetzteil-6a.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -16,10 +16,13 @@ esp32:
  framework:
    type: esp-idf

+network:
+  enable_ipv6: true
+
 wifi:
  ssid: "Voltage-legacy"
  password: !secret voltage_legacy_psk
-  use_address: serverroom.home  
+  #use_address: serverroom.home  
  power_save_mode: high
  fast_connect: on
  min_auth_mode: WPA2
@@ -1,321 +0,0 @@
-##############################################################################
-# Globals Glances parameters
-##############################################################################
-
-[global]
-# Does Glances should check if a newer version is available on PyPI ?
-check_update=false
-# History size (maximum number of values)
-# Default glances history size to 0
-# https://github.com/hassio-addons/addon-glances/issues/61
-# https://github.com/nicolargo/glances/issues/1341
-history_size=0
-
-##############################################################################
-# User interface
-##############################################################################
-
-[outputs]
-# Theme name for the Curses interface: black or white
-curse_theme=black
-# Limit the number of processes to display in the WebUI
-max_processes_display=30
-
-##############################################################################
-# plugins
-##############################################################################
-
-[quicklook]
-# Define CPU, MEM and SWAP thresholds in %
-cpu_careful=50
-cpu_warning=70
-cpu_critical=90
-mem_careful=50
-mem_warning=70
-mem_critical=90
-swap_careful=50
-swap_warning=70
-swap_critical=90
-
-[cpu]
-# Default values if not defined: 50/70/90 (except for iowait)
-user_careful=50
-user_warning=70
-user_critical=90
-#user_log=False
-#user_critical_action=echo {{user}} {{value}} {{max}} > /tmp/cpu.alert
-system_careful=50
-system_warning=70
-system_critical=90
-steal_careful=50
-steal_warning=70
-steal_critical=90
-#steal_log=True
-# I/O wait percentage should be lower than 1/# (Logical CPU cores)
-# Leave commented to just use the default config (1/#-20% / 1/#-10% / 1/#)
-#iowait_careful=30
-#iowait_warning=40
-#iowait_critical=50
-# Context switch limit (core / second)
-# Leave commented to just use the default config (critical is 50000*# (Logical CPU cores)
-#ctx_switches_careful=10000
-#ctx_switches_warning=12000
-#ctx_switches_critical=14000
-
-[percpu]
-# Define CPU thresholds in %
-# Default values if not defined: 50/70/90
-user_careful=50
-user_warning=70
-user_critical=90
-iowait_careful=50
-iowait_warning=70
-iowait_critical=90
-system_careful=50
-system_warning=70
-system_critical=90
-
-[gpu]
-# Default processor values if not defined: 50/70/90
-proc_careful=50
-proc_warning=70
-proc_critical=90
-# Default memory values if not defined: 50/70/90
-mem_careful=50
-mem_warning=70
-mem_critical=90
-
-[mem]
-# Define RAM thresholds in %
-# Default values if not defined: 50/70/90
-careful=50
-#careful_action_repeat=echo {{percent}} >> /tmp/memory.alert
-warning=70
-critical=90
-
-[memswap]
-# Define SWAP thresholds in %
-# Default values if not defined: 50/70/90
-careful=50
-warning=70
-critical=90
-
-[load]
-# Define LOAD thresholds
-# Value * number of cores
-# Default values if not defined: 0.7/1.0/5.0 per number of cores
-# Source: http://blog.scoutapp.com/articles/2009/07/31/understanding-load-averages
-#         http://www.linuxjournal.com/article/9001
-careful=0.7
-warning=1.0
-critical=5.0
-#log=False
-
-[network]
-# Default bitrate thresholds in % of the network interface speed
-# Default values if not defined: 70/80/90
-rx_careful=70
-rx_warning=80
-rx_critical=90
-tx_careful=70
-tx_warning=80
-tx_critical=90
-# Define the list of hidden network interfaces (comma-separated regexp)
-#hide=docker.*,lo
-# WLAN 0 alias
-#wlan0_alias=Wireless IF
-# It is possible to overwrite the bitrate thresholds per interface
-# WLAN 0 Default limits (in bits per second aka bps) for interface bitrate
-#wlan0_rx_careful=4000000
-#wlan0_rx_warning=5000000
-#wlan0_rx_critical=6000000
-#wlan0_rx_log=True
-#wlan0_tx_careful=700000
-#wlan0_tx_warning=900000
-#wlan0_tx_critical=1000000
-#wlan0_tx_log=True
-
-[wifi]
-# Define the list of hidden wireless network interfaces (comma-separated regexp)
-hide=lo,docker.*
-# Define SIGNAL thresholds in db (lower is better...)
-# Based on: http://serverfault.com/questions/501025/industry-standard-for-minimum-wifi-signal-strength
-careful=-65
-warning=-75
-critical=-85
-
-[diskio]
-# Define the list of hidden disks (comma-separated regexp)
-#hide=sda2,sda5,loop.*
-hide=loop.*
-# Alias for sda1
-#sda1_alias=IntDisk
-
-[fs]
-# Define the list of hidden file system (comma-separated regexp)
-#hide=/boot.*
-# Define filesystem space thresholds in %
-# Default values if not defined: 50/70/90
-# It is also possible to define per mount point value
-# Example: /_careful=40
-careful=50
-warning=70
-critical=90
-# Allow additional file system types (comma-separated FS type)
-#allow=zfs
-
-[folders]
-# Define a folder list to monitor
-# The list is composed of items (list_#nb <= 10)
-# An item is defined by:
-# * path: absolute path
-# * careful: optional careful threshold (in MB)
-# * warning: optional warning threshold (in MB)
-# * critical: optional critical threshold (in MB)
-folder_1_path=/config
-folder_1_careful=4096
-folder_1_warning=8196
-folder_1_critical=12228
-folder_2_path=/share
-folder_2_careful=4096
-folder_2_warning=8196
-folder_2_critical=12228
-folder_3_path=/backup
-folder_3_careful=4096
-folder_3_warning=8196
-folder_3_critical=12228
-folder_4_path=/media
-folder_4_careful=4096
-folder_4_warning=8196
-folder_4_critical=12228
-
-[sensors]
-# Sensors core thresholds (in Celsius...)
-# Default values if not defined: 60/70/80
-temperature_core_careful=60
-temperature_core_warning=70
-temperature_core_critical=80
-# Temperatures threshold in °C for hddtemp
-# Default values if not defined: 45/52/60
-temperature_hdd_careful=45
-temperature_hdd_warning=52
-temperature_hdd_critical=60
-# Battery threshold in %
-battery_careful=80
-battery_warning=90
-battery_critical=95
-# Sensors alias
-#temp1_alias=Motherboard 0
-#temp2_alias=Motherboard 1
-#core 0_alias=CPU Core 0
-#core 1_alias=CPU Core 1
-
-[processlist]
-# Define CPU/MEM (per process) thresholds in %
-# Default values if not defined: 50/70/90
-cpu_careful=50
-cpu_warning=70
-cpu_critical=90
-mem_careful=50
-mem_warning=70
-mem_critical=90
-#
-# Nice priorities range from -20 to 19.
-# Configure nice levels using a comma separated list.
-#
-# Nice: Example 1, non-zero is warning (default behavior)
-nice_warning=-20,-19,-18,-17,-16,-15,-14,-13,-12,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19
-#
-# Nice: Example 2, low priority processes escalate from careful to critical
-#nice_careful=1,2,3,4,5,6,7,8,9
-#nice_warning=10,11,12,13,14
-#nice_critical=15,16,17,18,19
-
-[ports]
-# Ports scanner plugin configuration
-# Interval in second between two scans
-refresh=30
-# Set the default timeout (in second) for a scan (can be overwritten in the scan list)
-timeout=3
-# If port_default_gateway is True, add the default gateway on top of the scan list
-port_default_gateway=True
-#
-# Define the scan list (1 < x < 255)
-# port_x_host (name or IP) is mandatory
-# port_x_port (TCP port number) is optional (if not set, use ICMP)
-# port_x_description is optional (if not set, define to host:port)
-# port_x_timeout is optional and overwrite the default timeout value
-# port_x_rtt_warning is optional and defines the warning threshold in ms
-#
-#port_1_host=192.168.0.1
-#port_1_port=80
-#port_1_description=Home Box
-#port_1_timeout=1
-#port_2_host=www.free.fr
-#port_2_description=My ISP
-#port_3_host=www.google.com
-#port_3_description=Internet ICMP
-#port_3_rtt_warning=1000
-#port_4_description=Internet Web
-#port_4_host=www.google.com
-#port_4_port=80
-#port_4_rtt_warning=1000
-#
-# Define Web (URL) monitoring list (1 < x < 255)
-# web_x_url is the URL to monitor (example: http://my.site.com/folder)
-# web_x_description is optional (if not set, define to URL)
-# web_x_timeout is optional and overwrite the default timeout value
-# web_x_rtt_warning is optional and defines the warning respond time in ms (approximatively)
-#
-#web_1_url=https://blog.nicolargo.com
-#web_1_description=My Blog
-#web_1_rtt_warning=3000
-#web_2_url=https://github.com
-#web_3_url=http://www.google.fr
-#web_3_description=Google Fr
-#web_4_url=https://blog.nicolargo.com/nonexist
-#web_4_description=Intranet
-
-[docker]
-# Thresholds for CPU and MEM (in %)
-cpu_careful=50
-cpu_warning=70
-cpu_critical=90
-mem_careful=20
-mem_warning=50
-mem_critical=70
-#
-# Per container thresholds
-#containername_cpu_careful=10
-#containername_cpu_warning=20
-#containername_cpu_critical=30
-#
-# By default, Glances only display running containers
-# Set the following key to True to display all containers
-all=False
-
-##############################################################################
-# Client/server
-##############################################################################
-
-[serverlist]
-# Define the static servers list
-#server_1_name=localhost
-#server_1_alias=My local PC
-#server_1_port=61209
-#server_2_name=localhost
-#server_2_port=61235
-#server_3_name=192.168.0.17
-#server_3_alias=Another PC on my network
-#server_3_port=61209
-#server_4_name=pasbon
-#server_4_port=61237
-
-[passwords]
-# Define the passwords list
-# Syntax: host=password
-# Where: host is the hostname
-#        password is the clear password
-# Additionally (and optionally) a default password could be defined
-#localhost=abc
-#default=defaultpassword
@@ -0,0 +1,40 @@
+epaper_demotivationszitat:
+  name: Epaper Demotivationszitat
+  icon: mdi:emoticon-sad-outline
+  options:
+    - "Erwarte nichts. Dann kann dich auch wenig enttäuschen."
+    - "Du musst nicht scheitern. Es reicht, es nie zu versuchen."
+    - "Der Weg ist das Ziel. Leider führt er im Kreis."
+    - "Auch ein Rückschritt ist Bewegung. Nur eben rückwärts."
+    - "Nicht jeder Tag muss gut sein. Dieser hier zum Beispiel nicht."
+    - "Dein Potenzial ist beeindruckend. Seine Nutzung bleibt optional."
+    - "Morgen wird alles besser. Wahrscheinlich aber auch nicht."
+    - "Motivation ist vergänglich. Frust ist zuverlässig."
+    - "Man kann nicht alles haben. Nicht einmal gute Laune."
+    - "Wenn Plan A scheitert, war Plan B vermutlich auch keine Hilfe."
+    - "Es ist nie zu spät, die Erwartungen zu senken."
+    - "Du bist nicht zu spät. Die anderen sind nur früher gescheitert."
+    - "Das wird schon. Nur eben nicht gut."
+    - "Ziele sind wichtig. Besonders wenn man sie verfehlt."
+    - "Die Konkurrenz schläft nicht. Du darfst trotzdem weitermachen."
+    - "Du gibst dein Bestes. Das erklärt einiges."
+    - "Jeder Fehler ist eine Lektion. Du bist bald Experte."
+    - "Heute ist ein neuer Tag. Die Probleme sind dieselben."
+    - "Erfolg braucht Geduld. Enttäuschung ist sofort verfügbar."
+    - "Ein kleiner Schritt für dich. Ein kaum bemerkbarer für alle anderen."
+    - "Wer früh aufgibt, hat länger frei."
+    - "Es gibt keine dummen Fragen. Nur ungünstige Zeitpunkte."
+    - "Deine Komfortzone vermisst dich nicht."
+    - "Manchmal gewinnt man. Meistens lernt man daraus."
+    - "Der erste Schritt ist der schwerste. Die anderen sind nur länger."
+    - "Arbeite hart. Vielleicht merkt es niemand."
+    - "Nicht aufgeben. Es könnte noch schlimmer werden."
+    - "Träume groß. Die Realität übernimmt den Rest."
+    - "Das Glas ist halb voll. Mit Problemen."
+    - "Jeder Tag bietet Chancen. Manche davon sind Termine."
+    - "Du kannst alles schaffen. Außer vielleicht heute."
+    - "Das Leben ist kurz. Besprechungen sind länger."
+    - "Mut steht am Anfang. Die Rechnung kommt später."
+    - "Wenn es einfach wäre, würde es jemand anders machen."
+    - "Deine To-do-Liste glaubt an dich. Sie muss ja nicht mitmachen."
+    - "Perfektion ist erreichbar. Nur nicht von hier."
@@ -0,0 +1,87 @@
+CALENDAR_NAMES = {
+    "calendar.tkrz_kalender": "Arbeit",
+    "calendar.privat": "Privat",
+}
+DAY_NAMES = ["Mo", "Di", "Mi", "Do", "Fr", "Sa", "So"]
+MAX_ENTRIES = 8
+# Reserve the right side of each row for start and end times.
+MAX_TITLE_LENGTH = 22
+MAX_META_LENGTH = 35
+
+
+def shorten(value, maximum):
+    value = (value or "").strip()
+    if len(value) <= maximum:
+        return value
+    return value[: maximum - 3].rstrip() + "..."
+
+
+def compact_event(event, calendar_name):
+    start = event.get("start", "")
+    all_day = "T" not in start
+    end = event.get("end", "")
+    time = "ganztägig" if all_day else start[11:16]
+    end_time = "" if all_day or "T" not in end else end[11:16]
+
+    location = (event.get("location") or "").split("\n")[0].strip()
+    meta = calendar_name
+    if location:
+        meta += " / " + location
+
+    return {
+        "title": shorten(event.get("summary", "Ohne Titel"), MAX_TITLE_LENGTH),
+        "time": time,
+        "end": end_time,
+        "meta": shorten(meta, MAX_META_LENGTH),
+        "all_day": int(all_day),
+    }
+
+
+calendar_data = data.get("calendar", {})
+today = str(data.get("now", ""))[:10]
+events_by_date = {}
+
+for calendar_id, calendar in calendar_data.items():
+    calendar_name = CALENDAR_NAMES.get(calendar_id, calendar_id.split(".")[-1].capitalize())
+    for event in calendar.get("events", []):
+        start = event.get("start", "")
+        end = event.get("end", "")
+        event_date = start[:10]
+        end_date = end[:10]
+
+        # Ignore malformed or already finished entries. All-day event end dates
+        # are exclusive in Home Assistant; timed events ending today may still be
+        # active. Multi-day entries remain visible on today's date rail.
+        all_day = "T" not in start
+        if not event_date or (all_day and end_date <= today) or (not all_day and end_date < today):
+            continue
+        if event_date < today:
+            event_date = today
+
+        events_by_date.setdefault(event_date, []).append(
+            compact_event(event, calendar_name)
+        )
+
+entries = []
+entry_count = 0
+for date in sorted(events_by_date):
+    if entry_count >= MAX_ENTRIES:
+        break
+
+    events = events_by_date[date]
+    events.sort(key=lambda item: (item["all_day"] == 0, item["time"]))
+    remaining = MAX_ENTRIES - entry_count
+    events = events[:remaining]
+    entry_count += len(events)
+
+    parsed_date = dt_util.parse_datetime(date)
+    entries.append(
+        {
+            "day": parsed_date.day,
+            "weekday": DAY_NAMES[parsed_date.weekday()],
+            "today": int(date == today),
+            "events": events,
+        }
+    )
+
+output["entries"] = entries
@@ -36,6 +36,8 @@
    - sensor.time
    - sensor.awtrix_kitchen_current_app
    - sensor.awtrix_desk_current_app
+    - sensor.owon_b35t_multimeter_core2_owon_b35t_multimeter_core2_reading
+    - sensor.owon_b35t_multimeter_core2_owon_b35t_multimeter_core2_mode
+    - sensor.owon_b35t_multimeter_core2_owon_b35t_multimeter_core2_unit
 #    event_types:
 #      - call_service # Don't record service calls
-
@@ -10,7 +10,8 @@
    unique_id: '3303381540758'
    host: !secret router_ip
    community: !secret router_community
-    baseoid: .1.3.6.1.2.1.31.1.1.1.6.511
+#    baseoid: .1.3.6.1.2.1.31.1.1.1.6.511
+    baseoid: .1.3.6.1.2.1.2.2.1.10.25
    version: 2c
    unit_of_measurement: "Octets"
  - platform: snmp
@@ -18,7 +19,8 @@
    unique_id: '1573258703922'
    host: !secret router_ip
    community: !secret router_community
-    baseoid: .1.3.6.1.2.1.31.1.1.1.10.511
+#    baseoid: .1.3.6.1.2.1.31.1.1.1.10.511
+    baseoid: .1.3.6.1.2.1.2.2.1.16.25
    version: 2c
    unit_of_measurement: "Octets"

@@ -38,13 +40,13 @@
    unique_id: '9081721471264'
    state_characteristic: mean
    entity_id: sensor.internet_speed_in
-    sampling_size: 10
+    sampling_size: 2
  - platform: statistics
    name: 'WAN Traffic Out'
    unique_id: '8688955223027'
    state_characteristic: mean
    entity_id: sensor.internet_speed_out
-    sampling_size: 10
+    sampling_size: 2

  # Sensor for Riemann sum of energy import (W -> Wh)
  - platform: integration
@@ -49,6 +49,11 @@
      name: Sun Setting Template
      state: '{{ as_timestamp(states.sun.sun.attributes.next_setting) | timestamp_custom
        (''%H:%M'') }}'
+    - unique_id: epaper_demotivational_quote
+      default_entity_id: sensor.epaper_demotivationszitat
+      name: Epaper Demotivationszitat
+      state: "{{ states('input_select.epaper_demotivationszitat') }}"
+
    - name: "power_other"
      unique_id: '5579422933393'
      unit_of_measurement: "W"
@@ -69,7 +74,7 @@
        {% set spieleschrank = states('sensor.wohnzimmer_spieleschrank_power') | float %}
        {% set kuehlschrank = states('sensor.tz3000_ww6drja5_ts011f_leistung') | float %}
        {% set kaffeemaschine = states('sensor.kaffeemaschine_leistung_2') | float %}
-        {% set waeschetrockner = states('sensor.waschetrockner_leistung') | float %}
+        {% set waeschetrockner = states('sensor.ikea_of_sweden_inspelning_smart_plug_leistung') | float %}
        {% set waschmaschine = states('sensor.waschmaschine_leistung') | float %}
        {% set arcade = states('sensor.arcade_automat_leistung') | float %}
        {% set spuelmaschine = states('sensor.spulmaschine_leistung') | float %}
@@ -79,6 +84,35 @@
      attributes:
        last_reset: '1970-01-01T00:00:00+00:00'

+  # Compact calendar feed for the e-paper display. The actual event data lives in
+  # the `entries` attribute, which ESPHome reads as a text sensor.
+  - trigger:
+      - trigger: homeassistant
+        event: start
+      - trigger: time_pattern
+        minutes: /15
+    action:
+      - action: calendar.get_events
+        target:
+          entity_id:
+            - calendar.tkrz_kalender
+            - calendar.privat
+        data:
+          duration:
+            days: 14
+        response_variable: calendar_response
+      - action: python_script.epaper_calendar_data
+        data:
+          calendar: "{{ calendar_response }}"
+          now: "{{ now().date() }}"
+        response_variable: calendar_converted
+    sensor:
+      - name: Epaper Kalenderdaten
+        unique_id: epaper_calendar_data
+        state: "{{ calendar_converted.entries | count }}"
+        attributes:
+          entries: "{{ calendar_converted.entries }}"
+
 # Shelly 3EM cumulative sensors (incl. PV)
  - sensor:
      # Template sensor for values of power import (active_power > 0)
@@ -139,6 +173,7 @@
        attributes:
          last_reset: '1970-01-01T00:00:00+00:00'
      - name: internet_speed_out
+        unique_id: '9519483670667'
        state: >
          {{ (( states('sensor.wan_out_derivative') | float * 8 / 1000000 ) | round(2)) }}
        unit_of_measurement: 'Mbps'
@@ -1,34 +1,40 @@
 # Internet traffic
  internet_usage_in_monthly:
-    source: sensor.snmp_wan_in
+    source: sensor.wan_in_derivative
    name: Monthly internet traffic in
    unique_id: monthly_internet_traffic_in
    cycle: monthly
+    delta_values: True
  internet_usage_out_monthly:
-    source: sensor.snmp_wan_out
+    source: sensor.wan_out_derivative
    name: Monthly internet traffic out
    unique_id: monthly_internet_traffic_out
    cycle: monthly
+    delta_values: True
  internet_usage_in_daily:
-    source: sensor.snmp_wan_in
+    source: sensor.wan_in_derivative
    name: Daily internet traffic in
    unique_id: daily_internet_traffic_in
    cycle: daily
+    delta_values: True
  internet_usage_out_daily:
-    source: sensor.snmp_wan_out
+    source: sensor.wan_out_derivative
    name: Daily internet traffic out
    unique_id: daily_internet_traffic_out
    cycle: daily
+    delta_values: True
  internet_usage_in_hourly:
-    source: sensor.snmp_wan_in
+    source: sensor.wan_in_derivative
    name: Hourly internet traffic in
    unique_id: hourly_internet_traffic_in
    cycle: hourly
+    delta_values: True
  internet_usage_out_hourly:
-    source: sensor.snmp_wan_out
+    source: sensor.wan_out_derivative
    name: Hourly internet traffic out
    unique_id: hourly_internet_traffic_out
    cycle: hourly
+    delta_values: True

 # Energy
  energy_import_daily:
Author	SHA1	Message	Date
Commander1024	4e46f60b65	Updated refresh logic to only rerender calendar, when contents changed.	2026-07-13 15:31:39 +02:00
ESPHome Device Builder	9e7684e294	Edit epaperframe.yaml	2026-07-13 14:33:32 +02:00
Commander1024	818b06f3d7	Merge branch 'epaperframe-gpt5.6'	2026-07-13 14:28:28 +02:00
Commander1024	99bb2594e2	Fixed utility meters and unsmoothen internet bandwidth monitors.	2026-07-13 13:08:24 +02:00
Commander1024	9104cd8fdc	Reapply "Fix traffic counters?" This reverts commit `96b88624d9`.	2026-07-13 10:30:47 +02:00
Commander1024	96b88624d9	Revert "Fix traffic counters?" This reverts commit `c1ba3012d4`.	2026-07-13 08:45:37 +02:00
Commander1024	c1ba3012d4	Fix traffic counters?	2026-07-13 08:36:46 +02:00
Commander1024	e77d9ee8d2	Adopted VyOS SNMP router traffic counter.	2026-07-13 08:23:31 +02:00
Commander1024	bf49633fac	Shortened calendar title again...	2026-07-11 23:20:09 +02:00
Commander1024	99579a30f7	Updated HA.	2026-07-11 23:19:48 +02:00
Commander1024	250bfa94bd	Add daily e-paper quote rotation	2026-07-11 22:58:23 +02:00
Commander1024	c342efc08f	Remove hidden-events footer from epaper frame	2026-07-11 22:47:32 +02:00
Commander1024	13e58355da	Finetuning of available space	2026-07-11 22:39:15 +02:00
Commander1024	ee814c4afe	Refine calendar event data display, prevent overlapping and display event's end time.	2026-07-11 22:26:08 +02:00
Commander1024	6149a9e994	Add calendar styling and WiFi indicator	2026-07-11 22:23:45 +02:00
Commander1024	3b7c30634e	Add compact calendar feed to e-paper display + HA	2026-07-11 21:41:21 +02:00
Commander1024	38da2cebdd	Remove epaper power display components	2026-07-11 21:00:42 +02:00
Commander1024	3da69c19ab	Base epaperframe config with Kinderzimmer	2026-07-11 19:14:52 +02:00
Commander1024	35e7f81224	Base epaperframe config with Kinderzimmer	2026-07-11 19:14:03 +02:00
Commander1024	e4a4aacc63	Added missing unique_id	2026-07-10 01:16:51 +02:00
Commander1024	0d12317089	revert `746dd833c8` revert Add unique_ids and calendar text sensors	2026-07-10 00:54:27 +02:00
Commander1024	746dd833c8	Add unique_ids and calendar text sensors	2026-07-10 00:38:16 +02:00
Commander1024	3eb482e40b	Added IPv6 support.	2026-07-09 09:03:24 +02:00
Commander1024	e9a6064b4b	Updated HA.	2026-07-09 08:59:52 +02:00
Commander1024	38616556cb	Updated HA.	2026-07-02 09:12:17 +02:00
Commander1024	bef1cfb1d0	Updated HA.	2026-06-23 09:12:01 +02:00
Commander1024	0a8364d7ed	Changed annunciators for climate control.	2026-06-23 09:11:50 +02:00
Commander1024	3eb9eb3a2f	Archived deprecated raspiaudio muse luxe config.	2026-06-23 09:11:01 +02:00
Commander1024	7407955465	Removed cached icons from repo.	2026-06-23 09:10:18 +02:00
Commander1024	2ff8b5cafe	Merged owon-ai-test into main.	2026-06-01 18:45:27 +02:00
Commander1024	7e08c4a8b9	Updated HA.	2026-06-01 18:42:56 +02:00
Commander1024	855f013095	Freedns test	2026-06-01 18:42:43 +02:00
Commander1024	a68b527c48	Various entity changees	2026-06-01 18:41:43 +02:00
Commander1024	cecec14be1	Added usage info.	2026-05-30 19:12:03 +02:00
Commander1024	4e5df1ad0c	Updated file comments	2026-05-30 19:00:18 +02:00
Commander1024	2c16ba1679	Separated long-press buttons into own HA entityies to make them usable	2026-05-30 18:49:16 +02:00
Commander1024	c21f2a5c7b	Display aestethics: taller 7-segments, repositioned minus, mode and icons	2026-05-30 17:49:56 +02:00
Commander1024	2a1902ccf1	Add reset all / reset energy function to also clear the local meter	2026-05-30 17:06:31 +02:00
Commander1024	31848bf26c	Add energy monitor using riemann sum algorithm.	2026-05-30 16:49:57 +02:00
Commander1024	d7337fd634	Set (somewhat) appropiate mdi icons for OWON HA sensors.	2026-05-30 08:22:32 +02:00
Commander1024	5b287303f1	Add backlight idle script	2026-05-28 22:58:15 +02:00
Commander1024	816cc35861	Implement dc-load inactivity display	2026-05-28 22:49:32 +02:00
Commander1024	058c186d63	Remove dead values from HA and rendering code. Also increase font size.	2026-05-28 22:24:46 +02:00
Commander1024	22e5f9d767	Implemented rough 1st iteration of dc-load value screen.	2026-05-28 22:09:54 +02:00
Commander1024	f9b32d06a4	Expose buttons Owon multimeter buttons to HA.	2026-05-28 16:04:53 +02:00
Commander1024	3f890ae02f	Intregrated Atorch BLE proxy and migrated device name to a generic one.	2026-05-28 14:35:12 +02:00
Commander1024	f0cb74cc27	Deactivate all indicator lights on meter disconnect.	2026-05-28 13:40:46 +02:00
Commander1024	6038075e9e	Fixed off-by-one error in rendering of the 7-segment segments.	2026-05-28 13:29:39 +02:00
Commander1024	2dbdfd213c	Deactivate bargraph after BLE disconnect	2026-05-28 12:29:52 +02:00
Commander1024	e2eb886eef	Renamed .h file to match .yaml filename.	2026-05-26 19:35:45 +02:00
Commander1024	f4f19eb847	Added attribution to original author and AI usage hint.	2026-05-26 19:25:56 +02:00
Commander1024	b3e307dcba	RAM optimization, deactivated recording of display values.	2026-05-26 19:19:22 +02:00
Commander1024	1b3b4870e7	Ported the code to M5Stack Core2 (different display) and removed reboot on disconnect	2026-05-26 19:10:30 +02:00
Commander1024	69c2166414	Archived the Core1 Owon multimeter config	2026-05-26 18:00:35 +02:00
Commander1024	2fcf71d8ce	Added Bluetooth and battery icons instead of text indicators	2026-05-26 17:36:58 +02:00
Commander1024	676829a988	Remove mode from Reading value - already present in Mode.	2026-05-26 17:21:11 +02:00
Commander1024	08201f1bc1	Uniform separation of 7-segment display font elements.	2026-05-26 17:10:43 +02:00
Commander1024	23cbd520a6	Repositioned DIODE/BUZZ and moved them out of the meter bar. Also slightly reworked 7-segment display font. Not perfect, yet though	2026-05-26 17:03:52 +02:00
Commander1024	6f4e2b9319	Moved AC/DC out of the way of the minus sign, added an h glyph for hFE display.	2026-05-26 16:44:25 +02:00
Commander1024	e5104fc005	Removed 2 unneeded values from HA reporting, fixed mV reporting value	2026-05-26 16:03:25 +02:00
Commander1024	91f3f69bd9	Optimized for mem pressure, inverted colors.	2026-05-26 15:34:03 +02:00
Commander1024	4bd62f539c	Initial AI-assisted esphome device code for Owon B35T+ multimeter.	2026-05-26 13:45:06 +02:00
Commander1024	a3bd9ff213	Removed cached png from repo.	2026-05-21 09:35:21 +02:00
Commander1024	24fc4bf9f4	Enabled ipv6 for all esphome devices.	2026-05-21 09:24:48 +02:00
Commander1024	0bfc2eff34	Changed little things...	2026-05-21 09:24:11 +02:00
Commander1024	8f18a043af	Updated HA + gitignore	2026-05-21 09:21:52 +02:00
Commander1024	5b0a992686	Changed light automations from time offset to sun elevation.	2026-04-29 07:27:53 +02:00
Commander1024	ef233296e9	Updated HA.	2026-04-29 07:27:22 +02:00
Commander1024	c0af2b734b	Added HA Icon cache.	2026-04-23 09:56:53 +02:00
Commander1024	a94386babe	Deleted obsolete glances config	2026-04-23 09:56:06 +02:00
Commander1024	f23166b765	Updated HA.	2026-04-23 09:55:38 +02:00
Commander1024	8438785241	Changed dryer zigbee plug.	2026-04-23 09:55:21 +02:00
Commander1024	b0b6093619	Added IKEA Bilresa dual button blueprint	2026-04-23 09:54:49 +02:00
Commander1024	c463a5e28f	Added kitchen Music switch, changed 420 players, light offset by sun elevation	2026-04-23 09:52:59 +02:00
@@ -1 +1 @@
 .3.0
 .7.2