NavIC_GPS.ino

/*************************************************************************
   PROJECT NAME:  Bharat Pi NavIC Shield test firmware 
   AUTHOR: Bharat Pi
   CREATED DATE: 26/03/2024
   COPYRIGHT: BharatPi @MIT license for usage on Bharat Pi boards
   VERSION: 2.0

   DESCRIPTION: NavIC get latlong and other navigation parameters using Bharat Pi NavIC tracker shield.

   REVISION HISTORY TABLE:
   ------------------------------------------
   Date      | Firmware Version | Comments
   ------------------------------------------
   26/03/2024 -    1.0       -    Initial release with Lat long and other nav parameters. Prints to serial monitor.
   05/08/2024 -    2.0       -    Switched to Hardware serial as the software serial had issues with baud rates,
                             -    Added Google maps link so that lat long can be viewed from URL printed on serial monitor

 *************************************************************************/

#include <TinyGPS++.h>
#include <HardwareSerial.h>

// ✅ Updated to match your wiring
#define GPS_RX_PIN 16   // GPS TX → ESP32 RX
#define GPS_TX_PIN 17   // GPS RX ← ESP32 TX

TinyGPSPlus gps;
HardwareSerial gpsSerial(2); // Using UART2

void setup() {
    Serial.begin(115200);  
    gpsSerial.begin(115200, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN); 
    delay(5000);

    Serial.println("\n\n\n**********************************************************************************");
    Serial.println("  Bharat Pi NavIC Shield Test Program");
    Serial.println("  Connected via UART2: GPIO16 (RX), GPIO17 (TX)");
    Serial.println("  Please wait while the NavIC module latches to satellites.");
    Serial.println("  Red LED (PPS) will blink once it latches.");
    Serial.println("  Ensure clear sky visibility.");
    Serial.println("**********************************************************************************\n");
    Serial.println("  Awaiting for NavIC satellite signal latching...\n\n");
}

void loop() {
    while (gpsSerial.available() > 0) {
        if (gps.encode(gpsSerial.read())) {
            if (gps.location.isValid()) {
                float latitude = gps.location.lat();
                float longitude = gps.location.lng();
                String date = String(gps.date.day()) + "/" + String(gps.date.month());
                String time = String(gps.time.hour()) + ":" + String(gps.time.minute());
                double speedKnots = gps.speed.knots();
                float courseDeg = gps.course.deg();
                double altitudeMts = gps.altitude.meters();
                uint32_t satellites = gps.satellites.value();
                double hdop = gps.hdop.hdop();

                Serial.print("Lat: "); Serial.println(latitude, 7);
                Serial.print("Long: "); Serial.println(longitude, 7);
                Serial.print("View on Google Maps: ");
                Serial.println("http://maps.google.com/maps?q=" + String(latitude, 7) + "," + String(longitude, 7));
                Serial.print("Speed (knots): "); Serial.println(speedKnots, 2);
                Serial.print("Course (°): "); Serial.println(courseDeg, 2);
                Serial.print("Altitude (m): "); Serial.println(altitudeMts, 2);
                Serial.print("Satellites: "); Serial.println(satellites);
                Serial.print("HDOP: "); Serial.println(hdop, 2);
                Serial.println("\n-----------------------------\n");
            }
        }
    }
}