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Document Core2 BLE proxy power and UI logic

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This commit is contained in:
Marcus Scholz
2026-06-23 10:06:08 +02:00
parent cecec14be1
commit b22c86e95b
2 changed files with 141 additions and 18 deletions
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esphome/lab-ble-proxy.yaml
+61 -1
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@@ -29,6 +29,9 @@ esphome:
on_boot:
priority: 850
then:
# The Core2 LCD/backlight rails are controlled by the AXP192 PMIC. ESPHome's
# stock M5CORE2 display setup does not initialize those rails here, so the
# custom header performs the M5Stack-specific power sequencing once I2C exists.
- lambda: |-
owon_b35t::core2_axp192_init(id(core2_i2c));
project:
@@ -77,10 +80,14 @@ wifi:
captive_portal:
globals:
# 0 = OWON meter page, 1 = Atorch DL24 page. This is intentionally volatile so
# every boot starts with the multimeter view until one device connects.
- id: display_page
type: int
initial_value: "0"
restore_value: no
# The Atorch external component does not expose a simple connected flag that the
# display lambda can query, so BLE callbacks maintain this state explicitly.
- id: atorch_connected
type: bool
initial_value: "false"
@@ -100,15 +107,19 @@ script:
- delay: 2min
- if:
condition:
# Only dim when both BLE devices are disconnected; active lab instruments
# keep the display fully lit so readings remain visible at a glance.
lambda: |-
return !owon_meter.connected && !id(atorch_connected);
then:
- light.turn_on:
id: backlight
brightness: 50%
brightness: 70%
- delay: 3min
- if:
condition:
# Re-check before turning the backlight off, because a connection may
# have been established during the preceding delay.
lambda: |-
return !owon_meter.connected && !id(atorch_connected);
then:
@@ -117,6 +128,8 @@ script:
interval:
- interval: 10s
then:
# Periodic memory telemetry is useful on the Core2 because BLE, PSRAM, the
# MIPI framebuffer, and external components can fragment different heap pools.
- 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()),
@@ -139,12 +152,16 @@ ble_client:
on_connect:
then:
- script.execute: wake_backlight
# Notify the custom parser/display object and switch to the meter page when
# the OWON connects, so the on-device screen follows the active instrument.
- lambda: |-
owon_meter.on_connect();
id(display_page) = 0;
id(lcd).update();
on_disconnect:
then:
# Keep the UI useful after a disconnect: if the Atorch is still online,
# automatically fall back from the OWON page to the Atorch page.
- lambda: |-
owon_meter.on_disconnect();
if (id(display_page) == 0 && id(atorch_connected)) {
@@ -153,6 +170,8 @@ ble_client:
id(lcd).update();
- if:
condition:
# Start the idle timer only after both BLE clients are gone; otherwise
# the remaining connected instrument still deserves an active display.
lambda: |-
return !owon_meter.connected && !id(atorch_connected);
then:
@@ -163,12 +182,16 @@ ble_client:
on_connect:
then:
- script.execute: wake_backlight
# The Atorch component handles measurements, while this explicit flag/page
# switch keeps the shared display state synchronized with the BLE client.
- lambda: |-
id(atorch_connected) = true;
id(display_page) = 1;
id(lcd).update();
on_disconnect:
then:
# If the load disconnects while the meter is still connected, move the
# physical display back to the meter instead of leaving a stale load page.
- lambda: |-
id(atorch_connected) = false;
if (id(display_page) == 1 && owon_meter.connected) {
@@ -177,6 +200,8 @@ ble_client:
id(lcd).update();
- if:
condition:
# Same idle rule as OWON disconnect: only dim/off when neither BLE
# target is connected anymore.
lambda: |-
return !owon_meter.connected && !id(atorch_connected);
then:
@@ -203,6 +228,8 @@ output:
type: float
id: lcd_backlight
write_action:
# Bridge ESPHome's generic monochromatic light level to the Core2-specific
# AXP192 backlight voltage helper implemented in lab-ble-proxy.h.
- lambda: |-
owon_b35t::core2_axp192_set_backlight(state);
@@ -217,6 +244,8 @@ font:
- file: "fonts/Roboto-Regular.ttf"
id: meter_font
size: 15
# Glyphs are whitelisted to save flash/RAM; include symbols used by units,
# status labels, soft-button names, and Atorch metric text.
glyphs:
[
" ",
@@ -293,6 +322,7 @@ font:
- file: "fonts/Roboto-Medium.ttf"
id: atorch_value_font
size: 22
# Larger Atorch value font only needs numeric characters and measurement units.
glyphs:
[
" ",
@@ -322,6 +352,8 @@ display:
id: lcd
model: M5CORE2
update_interval: 500ms
# Rendering is delegated to the custom C++ helper because ESPHome display YAML
# primitives would be unwieldy for the OWON seven-segment clone and Atorch dashboard.
lambda: |-
owon_meter.render(
it,
@@ -346,6 +378,8 @@ touchscreen:
- script.execute: wake_backlight
- if:
condition:
# Touching an idle/disconnected unit wakes the display briefly, then
# restarts the idle timer if no BLE target is available.
lambda: |-
return !owon_meter.connected && !id(atorch_connected);
then:
@@ -361,6 +395,7 @@ binary_sensor:
y_max: 195
on_press:
then:
# The large middle touch zone toggles between the two custom render pages.
- lambda: |-
id(display_page) = 1 - id(display_page);
id(lcd).update();
@@ -374,6 +409,7 @@ binary_sensor:
internal: true
on_press:
then:
# Left soft button changes which OWON remote command the center button will send.
- lambda: |-
owon_meter.previous_button();
- platform: touchscreen
@@ -396,6 +432,8 @@ binary_sensor:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# OWON remote-control payload: first byte selects the meter button,
# second byte selects the normal/short-press action variant.
value: !lambda |-
std::vector<uint8_t> data = {owon_meter.selected_button, 0x01};
return data;
@@ -410,6 +448,8 @@ binary_sensor:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# Long-press encoding is not uniform: SELECT and HZ/DUTY still use
# 0x01, while RANGE/HOLD/REL/MAX-MIN use 0x00 for their alternate action.
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};
@@ -424,12 +464,14 @@ binary_sensor:
internal: true
on_press:
then:
# Right soft button advances to the next OWON command label.
- lambda: |-
owon_meter.next_button();
- platform: template
name: "${friendly_name} OWON Connected"
icon: "mdi:bluetooth-connect"
# Template binary sensors expose state maintained by the custom OWON parser object.
lambda: |-
return owon_meter.connected;
- platform: template
@@ -450,6 +492,8 @@ binary_sensor:
return id(atorch_connected);
sensor:
# This hidden characteristic sensor is the bridge from OWON BLE notifications into
# custom C++ parsing. The returned float becomes the source numeric meter reading.
- platform: ble_client
type: characteristic
ble_client_id: owon_ble_client
@@ -488,6 +532,8 @@ sensor:
name: "${friendly_name} Atorch Dim Backlight"
id: atorch_dim_backlight
# The DL24 component exposes power, but this config computes Wh locally so the
# accumulated energy can be restored and reset alongside Atorch's own counters.
- platform: integration
name: "${friendly_name} Atorch Energy"
id: atorch_energy_calculated
@@ -506,18 +552,21 @@ text_sensor:
name: "${friendly_name} OWON Reading"
update_interval: 1s
icon: "mdi:gauge"
# Human-readable mirror of the meter LCD, including waiting/disconnected/OL states.
lambda: |-
return owon_meter.reading_text();
- platform: template
name: "${friendly_name} OWON Unit"
update_interval: 1s
icon: "mdi:ruler"
# Combines SI prefix and unit into one HA text entity, e.g. mV, kΩ, µA, %.
lambda: |-
return std::string(owon_meter.scale()) + owon_meter.unit();
- platform: template
name: "${friendly_name} OWON Mode"
icon: "mdi:knob"
update_interval: 1s
# Exposes decoded annunciators such as AC/DC, AUTO, HOLD, REL, MIN/MAX.
lambda: |-
return owon_meter.mode_text();
@@ -535,6 +584,7 @@ button:
reset_all:
name: "${friendly_name} Atorch Reset All"
on_press:
# Keep the locally integrated Wh counter in sync with the DL24 reset-all command.
- sensor.integration.reset: atorch_energy_calculated
usb_plus:
name: "${friendly_name} Atorch Plus"
@@ -544,6 +594,8 @@ button:
name: "${friendly_name} Atorch Setup"
enter:
name: "${friendly_name} Atorch Enter"
# Home Assistant button entities for direct OWON remote commands. The payloads
# are the same two-byte command format used by the touchscreen soft buttons.
- platform: template
name: "OWON SELECT"
id: owon_btn_select
@@ -552,6 +604,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# SELECT normal press.
value: !lambda "return std::vector<uint8_t>({1, 0x01});"
- platform: template
@@ -562,6 +615,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# RANGE normal press.
value: !lambda "return std::vector<uint8_t>({2, 0x01});"
- platform: template
@@ -572,6 +626,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# HOLD is the short/normal action on the shared HLD/LIG physical key.
value: !lambda "return std::vector<uint8_t>({3, 0x01});"
- platform: template
@@ -582,6 +637,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# LIGHT is the alternate/long action on the same HLD/LIG key.
value: !lambda "return std::vector<uint8_t>({3, 0x00});"
- platform: template
@@ -592,6 +648,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# RELATIVE is the short/normal action on the shared REL/BT key.
value: !lambda "return std::vector<uint8_t>({4, 0x01});"
- platform: template
@@ -602,6 +659,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# BT is the alternate/long action on the same REL/BT key.
value: !lambda "return std::vector<uint8_t>({4, 0x00});"
- platform: template
@@ -612,6 +670,7 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# HZ/DUTY command uses the normal action variant.
value: !lambda "return std::vector<uint8_t>({5, 0x01});"
- platform: template
@@ -622,4 +681,5 @@ button:
id: owon_ble_client
service_uuid: "0000fff0-0000-1000-8000-00805f9b34fb"
characteristic_uuid: "0000fff3-0000-1000-8000-00805f9b34fb"
# MAX/MIN command uses the normal action variant.
value: !lambda "return std::vector<uint8_t>({6, 0x01});"