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

#define BUFFER_SIZE 256
#define SERIAL_TX_PIN 4
#define SERIAL_RX_PIN 5

TinyGPSPlus gps;
SoftwareSerial serialGPS(SERIAL_RX_PIN, SERIAL_TX_PIN); 

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  serialGPS.begin(9600);
}

void loop() {
  Serial.println("Running loop...");
  while (serialGPS.available() > 0) {
    Serial.println("GPS data available");
    if (gps.encode(serialGPS.read())) {
      Serial.println("GPS data read");
      if (gps.location.isValid()) {
        Serial.println("GPS location valid");
        float latitude = gps.location.lat();
        String latitudeStr = String(latitude , 6);
        float longitude = gps.location.lng();
        String longitudeStr = String(longitude , 6);

        Serial.print("Lat: ");
        Serial.print(latitudeStr);
        Serial.print(" Lon: ");
        Serial.println(longitudeStr);
      }
    }
  }
  delay(500);
}