Updates

platformio.ini

@@ -10,6 +10,9 @@ lib_deps =
   adafruit/Adafruit SSD1306
   bblanchon/ArduinoJson
 
+; board_build.filesystem = spiffs
+; board_build.partitions = default.csv
+
 build_flags =
   -D PB_VERSION=\"1.0.0\"
   -D PB_HOSTNAME=\"faceplant\"

src/sensors/BatterySensor.cpp

@@ -3,11 +3,12 @@
 void BatterySensor::begin() {
   pinMode(PIN_BATTERY_ADC, INPUT);
   pinMode(PIN_LBO, INPUT);
+  pinMode(PIN_CHG, INPUT_PULLUP);  // CHG is LOW when charging
 
   analogReadResolution(12);  // 12-bit ADC (0-4095)
 
   Serial.println("[Battery] Initialized");
-  Serial.println("[Battery] ADC on GPIO 2, LBO on GPIO 5");
+  Serial.println("[Battery] ADC on GPIO 2, LBO on GPIO 5, CHG on GPIO 4");
 
   // Initial reading
   _voltage = readBatteryVoltage();
@@ -29,30 +30,47 @@ void BatterySensor::loop() {
   float prevVoltage = _voltage;
   int prevPercent = _percent;
   bool wasLow = _isLow;
+  bool wasCharging = _isCharging;
 
   // Read battery voltage via ADC
   _voltage = readBatteryVoltage();
   _percent = voltageToPercent(_voltage);
 
+  // Check CHG pin (LOW when charging)
+  bool chgLow = !digitalRead(PIN_CHG);
+  _isCharging = chgLow;
+
   // Check LBO pin as backup confirmation
   bool lboHigh = digitalRead(PIN_LBO);
   bool lboIndicatesLow = !lboHigh;
 
-  // Battery is low if either voltage is low OR LBO pin indicates low
-  _isLow = (_voltage < VOLTAGE_LOW) || lboIndicatesLow;
+  // Battery is low if either voltage is low OR LBO pin indicates low (and not charging)
+  _isLow = ((_voltage < VOLTAGE_LOW) || lboIndicatesLow) && !_isCharging;
 
   // Log significant changes
-  if (abs(_percent - prevPercent) >= 5 || _isLow != wasLow) {
+  if (abs(_percent - prevPercent) >= 5 || _isLow != wasLow || _isCharging != wasCharging) {
     Serial.print("[Battery] Voltage: ");
     Serial.print(_voltage, 2);
     Serial.print("V (");
     Serial.print(_percent);
-    Serial.print("%) LBO: ");
+    Serial.print("%) ");
+
+    if (_isCharging) {
+      Serial.print("CHARGING ");
+    }
+
+    Serial.print("LBO: ");
     Serial.println(lboHigh ? "OK" : "LOW");
 
-    if (_isLow && !wasLow) {
+    if (_isLow && !wasLow && !_isCharging) {
       Serial.println("[Battery] ⚠️  LOW BATTERY WARNING - Please recharge!");
     }
+
+    if (_isCharging && !wasCharging) {
+      Serial.println("[Battery] 🔌 Charging started");
+    } else if (!_isCharging && wasCharging) {
+      Serial.println("[Battery] ✓ Charging complete or disconnected");
+    }
   }
 }
 

src/sensors/BatterySensor.h

@@ -10,6 +10,7 @@ public:
   int percent() const { return _percent; }
   float voltage() const { return _voltage; }
   bool isLow() const { return _isLow; }
+  bool isCharging() const { return _isCharging; }
   bool shouldBlink() const;
 
   // For display
@@ -18,6 +19,7 @@ public:
 private:
   static constexpr int PIN_BATTERY_ADC = 2;  // Voltage divider input
   static constexpr int PIN_LBO = 5;          // PowerBoost LBO pin
+  static constexpr int PIN_CHG = 4;          // PowerBoost CHG pin (LOW when charging)
 
   static constexpr unsigned long CHECK_INTERVAL_MS = 2000;
   static constexpr int SAMPLES = 10;  // Number of ADC samples to average
@@ -33,6 +35,7 @@ private:
   int _percent = 100;
   float _voltage = 3.7;
   bool _isLow = false;
+  bool _isCharging = false;
   unsigned long _lastCheckMs = 0;
 
   float readBatteryVoltage();

src/ui/Display.cpp

@@ -60,11 +60,11 @@ _oled.display();
 delay(2100);
 }
 
-void Display::drawBatteryIcon(int x, int y, int percent, bool blink) {
+void Display::drawBatteryIcon(int x, int y, int percent, bool blink, bool charging) {
   if (!_ok) return;
 
-  // Skip if blinking and blink state is off
-  if (blink && ((millis() / 500) % 2 == 1)) return;
+  // Skip if blinking and blink state is off (unless charging)
+  if (!charging && blink && ((millis() / 500) % 2 == 1)) return;
 
   // Battery body: 14x7 rectangle
   _oled.drawRect(x, y, 14, 7, 1);
@@ -74,13 +74,33 @@ void Display::drawBatteryIcon(int x, int y, int percent, bool blink) {
 
   // Fill level: 12 pixels max width inside battery
   int fillWidth = (percent * 12) / 100;
-  if (fillWidth > 0) {
-    _oled.fillRect(x + 1, y + 1, fillWidth, 5, 1);
-  }
 
-  // Low battery warning: blink outline
-  if (percent < 20 && blink) {
-    // Draw thicker outline for emphasis
-    _oled.drawRect(x - 1, y - 1, 16, 9, 1);
+  if (charging) {
+    // Draw animated lightning bolt when charging
+    bool phase = (millis() / 300) % 2 == 0;
+    int color = phase ? 1 : 0;  // Blink between white and inverted
+
+    // Lightning bolt shape (simple zigzag)
+    _oled.drawLine(x + 7, y + 1, x + 5, y + 3, color);  // Top diagonal
+    _oled.drawLine(x + 5, y + 3, x + 9, y + 3, color);  // Middle horizontal
+    _oled.drawLine(x + 9, y + 3, x + 7, y + 5, color);  // Bottom diagonal
+
+    // Always draw at least some fill when charging
+    if (fillWidth == 0 && phase) {
+      _oled.fillRect(x + 1, y + 1, 2, 5, 1);  // Small pulse even at 0%
+    } else if (fillWidth > 0) {
+      _oled.fillRect(x + 1, y + 1, fillWidth, 5, 1);
+    }
+  } else {
+    // Normal fill level
+    if (fillWidth > 0) {
+      _oled.fillRect(x + 1, y + 1, fillWidth, 5, 1);
+    }
+
+    // Low battery warning: blink outline
+    if (percent < 20 && blink) {
+      // Draw thicker outline for emphasis
+      _oled.drawRect(x - 1, y - 1, 16, 9, 1);
+    }
   }
 }

src/ui/Display.h

@@ -11,7 +11,7 @@ public:
 
   void showStatus(const String& line1, const String& line2);
   void bootAnimation();
-  void drawBatteryIcon(int x, int y, int percent, bool blink);
+  void drawBatteryIcon(int x, int y, int percent, bool blink, bool charging);
 
 private:
   static constexpr int PIN_SDA = 6;

src/ui/FaceRenderer.cpp

@@ -157,7 +157,7 @@ void FaceRenderer::renderDead(unsigned long now, const BatterySensor& battery) {
   }
 
   // Draw battery icon in top-right corner
-  _display->drawBatteryIcon(110, 2, battery.percent(), battery.shouldBlink());
+  _display->drawBatteryIcon(110, 2, battery.percent(), battery.shouldBlink(), battery.isCharging());
 
   d.display();
 }
@@ -199,7 +199,7 @@ void FaceRenderer::renderBatteryLow(unsigned long now, const BatterySensor& batt
   drawMouthNervous();
 
   // Draw battery icon in top-right corner (blinking)
-  _display->drawBatteryIcon(110, 2, battery.percent(), true);
+  _display->drawBatteryIcon(110, 2, battery.percent(), true, battery.isCharging());
 
   d.display();
 }
@@ -230,7 +230,7 @@ void FaceRenderer::renderNormal(unsigned long now, const BatterySensor& battery)
   }
 
   // Draw battery icon in top-right corner
-  _display->drawBatteryIcon(110, 2, battery.percent(), battery.shouldBlink());
+  _display->drawBatteryIcon(110, 2, battery.percent(), battery.shouldBlink(), battery.isCharging());
 
   d.display();
 }