Initial AI-assisted esphome device code for Owon B35T+ multimeter.

esphome/owon-b35t.yaml

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+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.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
+
+captive_portal:
+
+esp32_ble_tracker:
+  scan_parameters:
+    active: true
+
+ble_client:
+  - mac_address: ${owon_mac_address}
+    id: owon_ble_client
+    on_connect:
+      then:
+        - lambda: |-
+            owon_meter.on_connect();
+    on_disconnect:
+      then:
+        - lambda: |-
+            owon_meter.on_disconnect();
+
+spi:
+  clk_pin: GPIO18
+  mosi_pin: GPIO23
+  miso_pin: GPIO19
+
+output:
+  - platform: ledc
+    pin: GPIO32
+    id: lcd_backlight
+
+light:
+  - platform: monochromatic
+    output: lcd_backlight
+    name: "${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",
+        "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: false
+    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: "${friendly_name} Low Battery"
+    lambda: |-
+      return owon_meter.low_battery;
+  - platform: template
+    name: "${friendly_name} Auto Range"
+    lambda: |-
+      return owon_meter.auto_range();
+  - platform: template
+    name: "${friendly_name} Hold"
+    lambda: |-
+      return owon_meter.hold();
+  - platform: template
+    name: "${friendly_name} Relative"
+    lambda: |-
+      return owon_meter.relative();
+  - platform: template
+    name: "${friendly_name} AC"
+    lambda: |-
+      return owon_meter.ac();
+  - platform: template
+    name: "${friendly_name} DC"
+    lambda: |-
+      return owon_meter.dc();
+  - platform: template
+    name: "${friendly_name} Continuity"
+    lambda: |-
+      return owon_meter.continuity();
+  - platform: template
+    name: "${friendly_name} Diode"
+    lambda: |-
+      return owon_meter.diode();
+
+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: "${friendly_name} WiFi Signal"
+    update_interval: 60s
+
+  - platform: template
+    name: "${friendly_name} Display Value"
+    id: owon_display_value
+    accuracy_decimals: 6
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.has_reading && !owon_meter.overload ? owon_meter.value() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Base Value"
+    id: owon_base_value
+    accuracy_decimals: 9
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.has_reading && !owon_meter.overload ? owon_meter.value_base() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Voltage"
+    device_class: voltage
+    unit_of_measurement: "V"
+    accuracy_decimals: 6
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.kind() == owon_b35t::Meter::KIND_VOLTAGE && !owon_meter.overload ? owon_meter.value_base() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Current"
+    device_class: current
+    unit_of_measurement: "A"
+    accuracy_decimals: 6
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.kind() == owon_b35t::Meter::KIND_CURRENT && !owon_meter.overload ? owon_meter.value_base() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Resistance"
+    unit_of_measurement: "Ω"
+    accuracy_decimals: 3
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.kind() == owon_b35t::Meter::KIND_RESISTANCE && !owon_meter.overload ? owon_meter.value_base() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Frequency"
+    device_class: frequency
+    unit_of_measurement: "Hz"
+    accuracy_decimals: 3
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.kind() == owon_b35t::Meter::KIND_FREQUENCY && !owon_meter.overload ? owon_meter.value_base() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Capacitance"
+    unit_of_measurement: "F"
+    accuracy_decimals: 12
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.kind() == owon_b35t::Meter::KIND_CAPACITANCE && !owon_meter.overload ? owon_meter.value_base() : NAN;
+
+  - platform: template
+    name: "${friendly_name} Temperature"
+    device_class: temperature
+    unit_of_measurement: "°C"
+    accuracy_decimals: 2
+    update_interval: 1s
+    lambda: |-
+      if (owon_meter.kind() == owon_b35t::Meter::KIND_TEMP_C && !owon_meter.overload) return owon_meter.value();
+      if (owon_meter.kind() == owon_b35t::Meter::KIND_TEMP_F && !owon_meter.overload) return (owon_meter.value() - 32.0f) * 5.0f / 9.0f;
+      return NAN;
+
+  - platform: template
+    name: "${friendly_name} Duty Cycle"
+    unit_of_measurement: "%"
+    accuracy_decimals: 2
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.kind() == owon_b35t::Meter::KIND_DUTY && !owon_meter.overload ? owon_meter.value() : NAN;
+
+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: "${friendly_name} Mode"
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.mode_text();
+  - platform: template
+    name: "${friendly_name} Meter Type"
+    update_interval: 1s
+    lambda: |-
+      return owon_meter.is_plus ? std::string("B35T+") : std::string("B35T");
+  - platform: template
+    name: "${friendly_name} Selected Button"
+    update_interval: 1s
+    lambda: |-
+      return std::string(owon_meter.selected_button_name());