#include <TinyGPS++.h> // NMEA GPS Parsing Library

#define GPS_BAUDRATE 9600  // Default baudrate of NEO-6M

#define RXD2 16 // Serial2 RX Pin 
#define TXD2 17 // Serial2 TX Pin

TinyGPSPlus gps;  // the TinyGPS++ object instance

void setup() {
  Serial.begin(9600);
  Serial2.begin(GPS_BAUDRATE, SERIAL_8N1, RXD2, TXD2);
  Serial.println(F("NEO6M GPS Module Simulation on ESP32"));
}

void loop() {
  if (Serial2.available() > 0) {
    if (gps.encode(Serial2.read())) {
      Serial.print(F("Location:\t("));
      if (gps.location.isValid()) {
        Serial.print(F("Latitude: "));  Serial.print(gps.location.lat(),6); Serial.print(F(", "));
        Serial.print(F("Longitude: ")); Serial.print(gps.location.lng(),6); Serial.print(F(", "));
        Serial.print(F("Altitude: "));
        if (gps.altitude.isValid())     Serial.print(gps.altitude.meters());
        else Serial.println(F("INVALID"));
      } else {
        Serial.println(F("INVALID"));
      }
      Serial.println(F(")"));

      Serial.print(F("Speed:\t\t"));
      if (gps.speed.isValid()) {
        Serial.print(gps.speed.kmph()); Serial.println(F(" km/h"));
      } else {
        Serial.println(F("INVALID"));
      }

      Serial.print(F("GPS Date&Time:\t"));
      if (gps.date.isValid() && gps.time.isValid()) {
        Serial.print(gps.date.year());    Serial.print(F("-"));
        Serial.print(gps.date.month());   Serial.print(F("-"));
        Serial.print(gps.date.day());     Serial.print(F(" "));
        Serial.print(gps.time.hour());    Serial.print(F(":"));
        Serial.print(gps.time.minute());  Serial.print(F(":"));
        Serial.println(gps.time.second());
      } else {
        Serial.println(F("INVALID"));
      }

      Serial.println();
    }
  }

  // No GPS Data Exception
  if (millis() > 5000 && gps.charsProcessed() < 10)
    Serial.println(F("No GPS data received: check wiring"));
}