#include <TinyGPS++.h>
#include <WiFi.h>
#include <HTTPClient.h>

// Replace with your network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Replace with your ThingsBoard server and device token
const char* thingboardURL = "https://demo.thingsboard.io/api/v1/Rf7HY24EinhL44wERGDf/telemetry";

// Initialize the TinyGPS++ object
TinyGPSPlus gps;

// Initialize the hardware serial port for GPS module
HardwareSerial gpsSerial(1);

void setup() {
  // Start the serial communication for debugging
  Serial.begin(115200);

  // Start the hardware serial communication for GPS module
  gpsSerial.begin(9600, SERIAL_8N1, 16, 17); // RX: GPIO16, TX: GPIO17

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
}

void loop() {
  // Check if data is available from the GPS module
  while (gpsSerial.available() > 0) {
    gps.encode(gpsSerial.read());
  }

  // If a valid GPS location is available, send it to ThingsBoard
  if (gps.location.isUpdated()) {
    float latitude = gps.location.lat();
    float longitude = gps.location.lng();
    float altitude = gps.altitude.meters();
    int satellites = gps.satellites.value();
    int hdop = gps.hdop.value();

    // Prepare JSON payload
    String payload = "{";
    payload += "\"latitude\":" + String(latitude, 6) + ",";
    payload += "\"longitude\":" + String(longitude, 6) + ",";
    payload += "\"altitude\":" + String(altitude) + ",";
    payload += "\"satellites\":" + String(satellites) + ",";
    payload += "\"hdop\":" + String(hdop);
    payload += "}";

    // Send data to ThingsBoard
    if (WiFi.status() == WL_CONNECTED) {
      HTTPClient http;
      http.begin(thingboardURL); // Use the correct URL
      http.addHeader("Content-Type", "application/json");

      int httpResponseCode = http.POST(payload);
      if (httpResponseCode > 0) {
        Serial.print("HTTP Response code: ");
        Serial.println(httpResponseCode);
      } else {
        Serial.print("Error code: ");
        Serial.println(httpResponseCode);
      }
      http.end();
    } else {
      Serial.println("WiFi Disconnected");
    }

    // Print GPS data to Serial Monitor
    Serial.print("Latitude: ");
    Serial.println(latitude, 6);
    Serial.print("Longitude: ");
    Serial.println(longitude, 6);
    Serial.print("Altitude: ");
    Serial.println(altitude);
    Serial.print("Satellites: ");
    Serial.println(satellites);
    Serial.print("HDOP: ");
    Serial.println(hdop);

    // Delay before next reading
    delay(100);  // Delay for 5 seconds
  }
}