Possibility for the client (for example a smartphone) to send current date and time

Added possibility to send GPS coordinates as well, but not enabled yet
because browsers require an HTTPS connection to enable the geolocation
API

ESP32/src/DataLogger.cpp

@@ -16,7 +16,7 @@ DataLogger::~DataLogger()
 {
 }
 
-void DataLogger::open()
+void DataLogger::open(const char* currentDateTime)
 {
 	if(isOpen()) return;
 
@@ -51,7 +51,10 @@ void DataLogger::open()
 	file = SPIFFS.open(fileName, FILE_WRITE);
 	if(!isOpen()) Serial.println("DataLogger: failed to open file");
 
-	if(!file.print("time,speed,battery voltage,battery output current,temperature,altitude\n")) Serial.println("DataLogger: failed to write to file");
+	char metadata[64];
+	sprintf(metadata, "start time: %s\n", currentDateTime == nullptr || currentDateTime[0] == 0 ? "NA" : currentDateTime);
+	if(!file.print(metadata)) Serial.println("DataLogger: failed to write to file");
+	if(!file.print("time,speed,battery voltage,battery output current,temperature,altitude,latitude,longitude\n")) Serial.println("DataLogger: failed to write to file");
 }
 
 void DataLogger::close()
@@ -69,7 +72,16 @@ void DataLogger::log(unsigned long timeMilliseconds, const Entry& entry)
 	if((lastEntry.isDifferent(entry) || currentTime >= lastLogTime + 20.0f) && currentTime >= lastLogTime + 0.2f)
 	{
 		char line[128];
-		sprintf(line, "%.3f,%.3f,%.3f,%.3f,%.1f,%.1f\n", currentTime, entry.speed, entry.batteryVoltage, entry.batteryOutputCurrent, entry.temperature, entry.altitude);
+		char coords[32];
+		if(entry.latitude < -900.0f || !gpsCoordsEnabled)
+		{
+			sprintf(coords, "NA,NA");
+		}
+		else
+		{
+			sprintf(coords, "%.5f,%.5f", entry.latitude, entry.longitude);
+		}
+		sprintf(line, "%.3f,%.3f,%.3f,%.3f,%.1f,%.1f,%s\n", currentTime, entry.speed, entry.batteryVoltage, entry.batteryOutputCurrent, entry.temperature, entry.altitude, coords);
 		file.print(line);
 
 		if(currentTime >= lastFlushTime + 10.0f)

ESP32/src/DataLogger.h

@@ -11,6 +11,8 @@ public:
 		float speed = 0.0f; // m/s
 		float temperature = 0.0f; // in °C
 		float altitude = 0.0f; // in m
+		float latitude = -1000.0f;
+		float longitude = -1000.0f;
 
 		bool isDifferent(const Entry& other)
 		{
@@ -20,7 +22,9 @@ public:
 				|| std::abs(batteryOutputCurrent - other.batteryOutputCurrent) > 0.1f * scale
 				|| std::abs(speed - other.speed) > 0.1f
 				|| std::abs(temperature - other.temperature) > 0.5f * scale
-				|| std::abs(altitude - other.altitude) > 0.5f * scale;
+				|| std::abs(altitude - other.altitude) > 0.5f * scale
+				|| std::abs(latitude - other.latitude) > 0.0001f
+				|| std::abs(longitude - other.longitude) > 0.0001f;
 		}
 	};
 
@@ -30,13 +34,15 @@ public:
 
 	static DataLogger& get() { return mainLogger; }
 
-	void open();
+	void open(const char* currentDateTime = nullptr);
 	void close();
 	void log(unsigned long timeMilliseconds, const Entry& entry);
 
 	bool isOpen();
 	const char* currentLogFileName();
 
+	void enableGPSCoordinates(bool enable) { gpsCoordsEnabled = enable; }
+
 private:
 	static DataLogger mainLogger;
 
@@ -47,4 +53,6 @@ private:
 	float lastFlushTime = 0.0f;
 
 	File file; // @suppress("Abstract class cannot be instantiated")
+
+	bool gpsCoordsEnabled = false;
 };

ESP32/src/vehicle-monitor.cpp

@@ -18,7 +18,8 @@
 
 #include <limits>
 
-#define DUMMY_DATA 1
+#define DUMMY_DATA 0
+#define ENABLE_GPS_COORDINATES 1
 
 AsyncWebServer server(80);
 
@@ -39,6 +40,10 @@ uint16_t batteryVoltage = 0; // in mV
 uint16_t batteryOutputCurrent = 0; // in mV
 int16_t temperature = 0; // in tenth of °C
 int32_t altitude = 0; // in mm above sea level (can be negative if below sea level, or depending on atmospheric conditions)
+float latitude = -1000.0f; // in decimal degrees
+float longitude = -1000.0f; // in decimal degrees
+float gpsAltitude = -1000.0f; // in meters, above sea level
+char realtime[32] = {0}; // UTC date and time, in format YYYY-MM-DDTHH:mm:ss.sssZ
 
 // current trip
 uint32_t tripDistance = 0; // in meters
@@ -191,6 +196,10 @@ void setup()
 	
 	OTA.begin();
 
+	#if ENABLE_GPS_COORDINATES
+	DataLogger::get().enableGPSCoordinates(true);
+	#endif
+
 	Wire.begin(I2C_SDA, I2C_SCL);
 
 	pressureSensor.begin(Wire);
@@ -230,10 +239,54 @@ void setup()
 		int usedSize = (int)(SPIFFS.usedBytes() / 1000);
 
 		char json[256];
-		sprintf(json, "{\"v\":%d,\"c\":%d,\"s\":%d,\"td\":%d,\"ttt\":%d,\"tmt\":%d,\"tae\":%d,\"tme\":%d,\"temp\":%d,\"alt\":%d,\"log\":\"%s\",\"tot\":%d,\"used\":%d}", v, c, s, td, ttt, tmt, tae, tme, temp, alt, logFileName, totalSize, usedSize);
+		sprintf(json, "{\"v\":%d,\"c\":%d,\"s\":%d,\"td\":%d,\"ttt\":%d,\"tmt\":%d,\"tae\":%d,\"tme\":%d,\"temp\":%d,\"alt\":%d,\"log\":\"%s\",\"tot\":%d,\"used\":%d,\"lat\":%.5f,\"lng\":%.5f,\"d\":\"%s\"}", v, c, s, td, ttt, tmt, tae, tme, temp, alt, logFileName, totalSize, usedSize, latitude, longitude, realtime);
 		request->send(200, "text/json", json);
 	});
 
+	server.on("/api/info", HTTP_POST, [](AsyncWebServerRequest *request){
+			//DebugLog.println("/api/info");
+
+			/*int params = request->params();
+			for(int i=0;i<params;i++){
+			  AsyncWebParameter* p = request->getParam(i);
+			  DebugLog.print(p->name().c_str());
+			  DebugLog.print("=");
+			  DebugLog.println(p->value().c_str());
+			}*/
+
+			AsyncWebParameter* latitudeParam = request->getParam("lat", true);
+			AsyncWebParameter* longitudeParam = request->getParam("lng", true);
+			AsyncWebParameter* altitudeParam = request->getParam("alt", true);
+			if(latitudeParam != nullptr && longitudeParam != nullptr)
+			{
+				char *ending = nullptr;
+				latitude = strtof(latitudeParam->value().c_str(), &ending);
+				if (*ending != 0)
+					latitude = -1000.0f;
+				longitude = strtof(longitudeParam->value().c_str(), &ending);
+				if (*ending != 0)
+					longitude = -1000.0f;
+				//DebugLog.print("lat="); DebugLog.print(latitude); DebugLog.print(" lng="); DebugLog.println(longitude);
+
+				if(altitudeParam != nullptr)
+				{
+					gpsAltitude = strtof(altitudeParam->value().c_str(), &ending);
+					if (*ending != 0)
+						gpsAltitude = -1000.0f;
+					//DebugLog.print("alt="); DebugLog.println(gpsAltitude);
+				}
+			}
+
+			AsyncWebParameter* timeParam = request->getParam("time", true);
+			if(timeParam != nullptr)
+			{
+				strcpy(realtime, timeParam->value().c_str());
+				//DebugLog.print("time="); DebugLog.println(realtime);
+			}
+
+			request->send(200);
+		});
+
 	server.on("/api/log/list", HTTP_GET, [](AsyncWebServerRequest *request){
 		String json;
 
@@ -435,13 +488,16 @@ void loop()
 	entry.temperature = (float)temperature / 10.0f;
 	entry.altitude = (float)altitude / 1000.0f;
 
+	entry.latitude = latitude;
+	entry.longitude = longitude;
+
 	if(entry.speed > 0.0f)
 	{
 		stoppedSince = -1;
 		if(!DataLogger::get().isOpen())
 		{
 			DebugLog.println("Starting DataLogger");
-			DataLogger::get().open();
+			DataLogger::get().open(realtime);
 			tripDistance = 0;
 			tripMovingTime = 0;
 			tripTotalTime = 0;
@@ -486,8 +542,16 @@ void loop()
 
 	uint32_t altitudeMillimeters = (uint32_t)(entry.altitude * 1000.0f + 0.5f);
 	static uint32_t lastLoopAltitude = altitudeMillimeters;
-	uint32_t altitudeChange = altitudeMillimeters - lastLoopAltitude;
-	lastLoopAltitude = altitudeMillimeters;
+	uint32_t clampedPositiveAltitudeChange = 0;
+	if(altitudeMillimeters > lastLoopAltitude + 300)
+	{
+		clampedPositiveAltitudeChange = altitudeMillimeters - lastLoopAltitude;
+		lastLoopAltitude = altitudeMillimeters;
+	}
+	else if(lastLoopAltitude > 300 && altitudeMillimeters < lastLoopAltitude - 300)
+	{
+		lastLoopAltitude = altitudeMillimeters;
+	}
 
 	if(isOnTrip)
 	{
@@ -495,8 +559,7 @@ void loop()
 		if(isMoving) tripMovingTime += newSeconds;
 		tripDistance += newMeters;
 
-		if(altitudeChange > 0)
-			tripAscendingElevation += altitudeChange;
+		tripAscendingElevation += clampedPositiveAltitudeChange;
 
 		static float remainingEnergy = 0.0f;
 		float newEnergy = entry.batteryVoltage * entry.batteryOutputCurrent * ((float)dt / 1000.0f) + remainingEnergy;

WebApp/src/monitor-api.ts

@@ -10,7 +10,10 @@ export interface Status {
 	tripAscendingElevation: number; // in meters
 	tripMotorEnergy: number; // in Watt-hour
 	temperature: number; // in Celcius degrees
+	latitude?: number; // latitude (decimal degrees)
+	longitude?: number; // longitude (decimal degrees)
 	altitude: number; // in meters above sea level
+	dateTime?: Date; // current date and time (UTC)
 };
 
 interface ApiStatus {
@@ -24,11 +27,29 @@ interface ApiStatus {
 	tme: number; // trip motor energy (Wh)
 	temp: number; // temperature (tenth of °C)
 	alt: number; // altitude (mm)
+	lat: number; // latitude (in decimal degrees), or -1000 if unknown
+	lng: number; // longitude (in decimal degrees), or -1000 if unknown
+	d: string; // current UTC date and time, in format "YYYY-MM-DDTHH:mm:ss.sssZ", or empty string if unknown
+}
+
+export interface Info {
+	latitude: number; // latitude (decimal degrees)
+	longitude: number; // longitude (decimal degrees)
+	altitude: number; // altitude (from sea level, in meters)
+	time: Date; // UTC date and time
+}
+
+interface ApiInfo {
+	lat?: number; // latitude (decimal degrees)
+	lng?: number; // longitude (decimal degrees)
+	alt?: number; // altitude (from sea level, in meters)
+	time?: string; // UTC date and time, in format "YYYY-MM-DDTHH:mm:ss.sssZ"
 }
 
 export class MonitorApi {
 	private mockServer: boolean;
 	private lastStatus: Status = null;
+	private lastKnownPosition: GeolocationPosition = null;
 	private static api: MonitorApi = null;
 	
 	private lastFetchTime = 0;
@@ -52,6 +73,81 @@ export class MonitorApi {
 	
 	getStatus() { return this.lastStatus; }
 	
+	async autoUpdateInfo(): Promise<void> {
+		if (navigator.geolocation) {
+			let updatePosition = (position: GeolocationPosition) => {
+				this.lastKnownPosition = position;
+			};
+			
+			const options = {
+				enableHighAccuracy: true,
+				timeout: 6000,
+				maximumAge: 3000,
+			};
+			
+			//navigator.geolocation.getCurrentPosition(updatePosition, () => updatePosition(null), options);
+		}
+		
+		const defaultPosition : GeolocationPosition = {
+			timestamp: 0,
+			coords: {
+				latitude: -1000,
+				longitude: -1000,
+				accuracy: -1,
+				altitude: -1000,
+				altitudeAccuracy: -1,
+				heading: null,
+				speed: null
+			}
+		};
+		let position = this.lastKnownPosition == null ? defaultPosition : this.lastKnownPosition;
+		
+		let info: Info = {
+			latitude: position.coords.latitude,
+			longitude: position.coords.longitude,
+			altitude: position.coords.altitude,
+			time: new Date()
+		};
+		await this.postInfo(info);
+	}
+	
+	async postInfo(info: Info): Promise<void> {
+		let apiInfo: ApiInfo = {
+			lat: info.latitude,
+			lng: info.longitude,
+			alt: info.altitude,
+			time: info.time.toISOString()
+		};
+		
+		if(this.mockServer) {
+			await new Promise(resolve => setTimeout(resolve, 200));
+		} else {
+			await new Promise<void>((resolve, error) => {
+				let request = new XMLHttpRequest();
+				request.onreadystatechange = () => {
+					if(request.readyState == 4) {
+						if(request.status == 200) {
+							resolve();
+						}
+						else {
+							error();
+						}
+					}
+				};
+				
+				let urlEncodedData = "";
+				for(let name in apiInfo) {
+					if(urlEncodedData != "") urlEncodedData += "&";
+					urlEncodedData += encodeURIComponent(name)+'='+encodeURIComponent((<any>apiInfo)[name]);
+				}
+				
+				request.open('POST', '/api/info', true);
+				request.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
+				request.send(urlEncodedData);
+			});
+		}
+	}
+	
 	async fetchStatus(): Promise<Status> {
 		let apiStatus: ApiStatus;
 		
@@ -94,7 +190,10 @@ export class MonitorApi {
 				tae: Math.round(this.mockedTripAscendingElevation*10.0),
 				tme: Math.round(this.mockedTripMotorEnergy*10.0),
 				temp: Math.round((Math.cos(t*0.2)+1.0)*0.5 * 400 - 100),
-				alt: Math.round(altitude * 1000)
+				lat: -1000,
+				lng: -1000,
+				alt: Math.round(altitude * 1000),
+				d: ''
 			};
 		} else {
 			apiStatus = await new Promise<ApiStatus>((resolve, error) => {
@@ -124,7 +223,10 @@ export class MonitorApi {
 			tripAscendingElevation: apiStatus.tae / 10,
 			tripMotorEnergy: apiStatus.tme / 10,
 			temperature: apiStatus.temp / 10,
-			altitude: apiStatus.alt / 1000
+			latitude: apiStatus.lat <= -900 ? null : apiStatus.lat,
+			longitude: apiStatus.lng <= -900 ? null : apiStatus.lng,
+			altitude: apiStatus.alt / 1000,
+			dateTime: apiStatus.d == '' ? null : new Date(apiStatus.d)
 		};
 		
 		return this.lastStatus;

WebApp/src/pages/dashboard/dashboard-page.tsx

@@ -49,6 +49,7 @@ export class DashboardPage extends Page {
 	}
 	
 	async refresh() {
+		await MonitorApi.get().autoUpdateInfo();
 		let newStatus = await MonitorApi.get().fetchStatus();
 		if(this.status == null)
 			m.redraw();

WebApp/src/pages/raw-data/raw-data-page.tsx

@@ -18,6 +18,7 @@ export class RawDataPage extends Page {
 	}
 	
 	async refresh() {
+		await MonitorApi.get().autoUpdateInfo();
 		this.status = await MonitorApi.get().fetchStatus();
 		m.redraw();
 		if(this.autoRefresh)
@@ -35,6 +36,12 @@ export class RawDataPage extends Page {
 				<p>Vitesse : {(this.status.speed * 3.6).toFixed(1)}km/h</p>
 				<p>Temperature : {this.status.temperature.toFixed(1)}°C</p>
 				<p>Altitude : {this.status.altitude.toFixed(1)}m</p>
+				{this.status.latitude ?
+					<p>Lat {this.status.latitude.toFixed(5)}° Lng {this.status.latitude.toFixed(5)}°</p>
+					: null}
+				{this.status.dateTime ?
+					<p>Time : {this.status.dateTime.toString()}</p>
+					: null}
 			</div>
 			: <p>Chargement...</p>;
 	}