Initial release: Ratdeck v1.0.0

Reticulum transport node + LXMF encrypted messenger for LilyGo T-Deck Plus.
ESP32-S3, 16MB flash, SX1262 LoRa, LovyanGFX display, NimBLE BLE.

src/hal/Power.cpp

@@ -0,0 +1,94 @@
+#include "Power.h"
+#include "hal/Display.h"
+
+// Forward declaration — display instance provided externally
+extern Display display;
+
+void Power::enablePeripherals() {
+    // CRITICAL: GPIO 10 must be HIGH to enable all T-Deck Plus peripherals
+    pinMode(BOARD_POWER_PIN, OUTPUT);
+    digitalWrite(BOARD_POWER_PIN, HIGH);
+    delay(10);  // Allow peripherals to stabilize
+}
+
+void Power::begin() {
+    _lastActivity = millis();
+    _state = ACTIVE;
+
+    // Configure battery ADC
+    pinMode(BAT_ADC_PIN, INPUT);
+    analogReadResolution(12);
+
+    Serial.println("[POWER] Power manager initialized");
+}
+
+float Power::batteryVoltage() const {
+    // T-Deck Plus: voltage divider on GPIO 4
+    int raw = analogRead(BAT_ADC_PIN);
+    // Voltage divider: 2x ratio, 3.3V reference, 12-bit ADC
+    return (raw / 4095.0f) * 3.3f * 2.0f;
+}
+
+int Power::batteryPercent() const {
+    float v = batteryVoltage();
+    // LiPo voltage curve approximation
+    if (v >= 4.2f) return 100;
+    if (v <= 3.0f) return 0;
+    return (int)((v - 3.0f) / 1.2f * 100.0f);
+}
+
+void Power::activity() {
+    _lastActivity = millis();
+    if (_state != ACTIVE) {
+        setState(ACTIVE);
+    }
+}
+
+void Power::setBrightness(uint8_t brightness) {
+    _fullBrightness = brightness;
+    if (_state == ACTIVE) {
+        display.setBrightness(_fullBrightness);
+    }
+}
+
+void Power::loop() {
+    unsigned long elapsed = millis() - _lastActivity;
+
+    switch (_state) {
+        case ACTIVE:
+            if (_offTimeout > 0 && elapsed >= _offTimeout) {
+                setState(SCREEN_OFF);
+            } else if (_dimTimeout > 0 && elapsed >= _dimTimeout) {
+                setState(DIMMED);
+            }
+            break;
+
+        case DIMMED:
+            if (_offTimeout > 0 && elapsed >= _offTimeout) {
+                setState(SCREEN_OFF);
+            }
+            break;
+
+        case SCREEN_OFF:
+            break;
+    }
+}
+
+void Power::setState(State newState) {
+    if (newState == _state) return;
+    _state = newState;
+
+    switch (_state) {
+        case ACTIVE:
+            display.wakeup();
+            display.setBrightness(_fullBrightness);
+            break;
+        case DIMMED:
+            display.setBrightness(DIM_BRIGHTNESS);
+            break;
+        case SCREEN_OFF:
+            display.setBrightness(0);
+            display.sleep();
+            break;
+    }
+}