#include <TinyGPSPlus.h>
#include <HardwareSerial.h>

static const uint32_t GPSBaud = 38400;  // Baud rate for GPS communication

TinyGPSPlus gps;
HardwareSerial SerialGPS(1);  // Use hardware serial 1 (UART1) on ESP32

void setup()
{
    Serial.begin(115200);  // Initialize Serial for debugging
    SerialGPS.begin(GPSBaud, SERIAL_8N1, 16, 17);  // Initialize Serial1 for GPS

    Serial.println(F("DeviceExample.ino"));
    Serial.println(F("A simple demonstration of TinyGPSPlus with an attached GPS module"));
    Serial.print(F("Testing TinyGPSPlus library v. "));
    Serial.println(TinyGPSPlus::libraryVersion());
    Serial.println();
}

void loop()
{
    // This sketch displays information every time a new sentence is correctly encoded.
    while (SerialGPS.available() > 0)
    {
        if (gps.encode(SerialGPS.read()))
            displayInfo();
    }

    if (millis() > 5000 && gps.charsProcessed() < 10)
    {
        Serial.println(F("No GPS detected: check wiring."));
        while(true);  // Infinite loop to stop execution if no GPS is detected
    }
}

void displayInfo()
{
    Serial.print(F("Location: "));
    if (gps.location.isValid())
    {
        Serial.print(gps.location.lat(), 6);
        Serial.print(F(","));
        Serial.print(gps.location.lng(), 6);
    }
    else
    {
        Serial.print(F("INVALID"));
    }

    Serial.print(F(" Date/Time: "));
    if (gps.date.isValid())
    {
        Serial.print(gps.date.month());
        Serial.print(F("/"));
        Serial.print(gps.date.day());
        Serial.print(F("/"));
        Serial.print(gps.date.year());
    }
    else
    {
        Serial.print(F("INVALID"));
    }

    Serial.print(F(" "));
    if (gps.time.isValid())
    {
        if (gps.time.hour() < 10) Serial.print(F("0"));
        Serial.print(gps.time.hour());
        Serial.print(F(":"));
       
        if (gps.time.minute() < 10) Serial.print(F("0"));
        Serial.print(gps.time.minute());
        Serial.print(F(":"));
       
        if (gps.time.second() < 10) Serial.print(F("0"));
        Serial.print(gps.time.second());
        Serial.print(F("."));
       
        if (gps.time.centisecond() < 10) Serial.print(F("0"));
        Serial.print(gps.time.centisecond());
    }
    else
    {
        Serial.print(F("INVALID"));
    }

    Serial.println();
}