Moved SCL to GPIO4 because boot fails if it's connected to GPIO12

Added temperature and altitude to data logger
Added periodic log flush to avoid data loss

ESP32/src/DataLogger.cpp

@@ -72,6 +72,13 @@ void DataLogger::log(unsigned long timeMilliseconds, const Entry& entry)
 		sprintf(line, "%.3f,%.3f,%.3f,%.3f,%.1f,%.1f\n", currentTime, entry.speed, entry.batteryVoltage, entry.batteryOutputCurrent, entry.temperature, entry.altitude);
 		file.print(line);
 
+		if(currentTime >= lastFlushTime + 10.0f)
+		{
+			// we need to flush often enough, because the system is typically powered off right after arrival to destination
+			file.flush();
+			lastFlushTime = currentTime;
+		}
+
 		lastEntry = entry;
 		lastLogTime = currentTime;
 	}

ESP32/src/DataLogger.h

@@ -44,6 +44,7 @@ private:
 	unsigned long lastTimeMilliseconds = -1;
 	float currentTime = 0.0f;
 	float lastLogTime = 0.0f;
+	float lastFlushTime = 0.0f;
 
 	File file; // @suppress("Abstract class cannot be instantiated")
 };

ESP32/src/vehicle-monitor.cpp

@@ -27,7 +27,7 @@ Dps310 pressureSensor = Dps310();
 const int8_t speedSensorPin = 13;
 const int8_t debugLedPin = 2;
 const int8_t I2C_SDA = 15;
-const int8_t I2C_SCL = 12;
+const int8_t I2C_SCL = 4;
 
 const float wheelDiameterInches = 20;
 const int numImpulsesPerTurn = 2;
@@ -383,6 +383,8 @@ void loop()
 	entry.batteryVoltage = (float)batteryVoltage / 1000.0f;
 	entry.batteryOutputCurrent = (float)batteryOutputCurrent / 1000.0f;
 	entry.speed = getSpeed();
+	entry.temperature = (float)temperature / 10.0f;
+	entry.altitude = (float)altitude / 1000.0f;
 
 	if(entry.speed > 0.0f)
 	{

schema/MCU_board/MCU_board.kicad_prl

@@ -1,7 +1,7 @@
 {
   "board": {
     "active_layer": 0,
-    "active_layer_preset": "Toutes Couches",
+    "active_layer_preset": "All Layers",
     "auto_track_width": true,
     "hidden_nets": [],
     "high_contrast_mode": 0,