feat: ESP32 battery monitoring + adaptive screen brightness
Add battery voltage/level sensors (GPIO1 ADC) for the dock battery holder. Screen now wakes at a configurable dim level on radar presence (default 30%) and jumps to 100% for voice activity (listening, thinking, replying). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Aodhan Collins
@@ -67,6 +67,7 @@ ESP32-S3-BOX-3
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| Sensor dock I2C SCL | GPIO40 | sensor bus (AHT-30, AT581x radar) |
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| Sensor dock I2C SDA | GPIO41 | sensor bus (AHT-30, AT581x radar) |
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| Radar presence output | GPIO21 | AT581x digital detection pin |
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| Battery voltage ADC | GPIO1 | dock battery holder, voltage divider (×2) |
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---
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@@ -117,6 +118,14 @@ Optional accessory dock connected via secondary I2C bus (GPIO40/41, 100kHz):
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- **AT581x mmWave radar** — presence detection via GPIO21, I2C for settings config
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- **Radar RF switch** — toggle radar on/off from HA
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- Radar configured on boot: sensing_distance=600, trigger_keep=5s, hw_frontend_reset=true
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- **Battery monitoring** — ADC on GPIO1 with voltage divider (×2), reports voltage + percentage (Li-ion 3.0–4.2V curve)
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### Display Brightness
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Screen brightness adapts to context:
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- **Radar presence** → wakes at configurable dim level (default 30%, adjustable 5–100% via "Radar brightness" entity in HA)
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- **Voice activity** (listening, thinking, replying, error, timer) → full 100% brightness
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- **Idle timeout** → screen off (configurable 1–60 min)
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### Voice Assistant
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@@ -147,7 +147,9 @@ binary_sensor:
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id: radar_presence
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device_class: occupancy
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on_press:
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- script.execute: screen_wake
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- script.execute:
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id: screen_wake
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brightness_pct: !lambda return id(radar_brightness).state;
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- script.execute: screen_idle_timer
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# --- Display backlight ---
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@@ -371,22 +373,22 @@ script:
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- lambda: |
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switch(id(voice_assistant_phase)) {
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case ${voice_assist_listening_phase_id}:
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id(screen_wake).execute();
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id(screen_wake).execute(100.0f);
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id(s3_box_lcd).show_page(listening_page);
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id(s3_box_lcd).update();
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break;
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case ${voice_assist_thinking_phase_id}:
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id(screen_wake).execute();
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id(screen_wake).execute(100.0f);
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id(s3_box_lcd).show_page(thinking_page);
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id(s3_box_lcd).update();
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break;
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case ${voice_assist_replying_phase_id}:
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id(screen_wake).execute();
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id(screen_wake).execute(100.0f);
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id(s3_box_lcd).show_page(replying_page);
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id(s3_box_lcd).update();
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break;
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case ${voice_assist_error_phase_id}:
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id(screen_wake).execute();
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id(screen_wake).execute(100.0f);
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id(s3_box_lcd).show_page(error_page);
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id(s3_box_lcd).update();
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break;
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@@ -400,7 +402,7 @@ script:
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id(s3_box_lcd).update();
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break;
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case ${voice_assist_timer_finished_phase_id}:
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id(screen_wake).execute();
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id(screen_wake).execute(100.0f);
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id(s3_box_lcd).show_page(timer_finished_page);
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id(s3_box_lcd).update();
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break;
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@@ -560,14 +562,12 @@ script:
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- id: screen_wake
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mode: restart
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parameters:
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brightness_pct: float
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then:
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- if:
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condition:
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light.is_off: led
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then:
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- light.turn_on:
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id: led
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brightness: 100%
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- light.turn_on:
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id: led
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brightness: !lambda return brightness_pct / 100.0f;
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# --- Switches ---
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@@ -689,6 +689,18 @@ number:
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max_value: 60
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step: 1
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initial_value: 1
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- platform: template
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name: Radar brightness
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id: radar_brightness
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icon: "mdi:brightness-6"
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entity_category: config
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unit_of_measurement: "%"
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optimistic: true
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restore_value: true
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min_value: 5
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max_value: 100
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step: 5
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initial_value: 30
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# --- Sensor dock (ESP32-S3-BOX-3-SENSOR) ---
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@@ -709,6 +721,31 @@ sensor:
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window_size: 5
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send_every: 5
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update_interval: 30s
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# --- Battery voltage (dock battery holder, GPIO1 with voltage divider) ---
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- platform: adc
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pin: GPIO1
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name: Battery Voltage
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id: battery_voltage
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attenuation: 12db
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update_interval: 60s
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filters:
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- multiply: 2.0 # voltage divider ratio on dock
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- sliding_window_moving_average:
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window_size: 5
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send_every: 5
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- platform: template
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name: Battery Level
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id: battery_level
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unit_of_measurement: "%"
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device_class: battery
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accuracy_decimals: 0
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update_interval: 60s
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lambda: |-
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float v = id(battery_voltage).state;
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if (v >= 4.2) return 100.0f;
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if (v <= 3.0) return 0.0f;
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// Simple linear approximation for Li-ion 3.0V–4.2V
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return (v - 3.0f) / 1.2f * 100.0f;
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at581x:
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i2c_id: sensor_bus
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