Arduino - GPS

In this tutorial, we are going to learn how to get GPS coordinates (longitude, latitude, altitude), GPS speed (km/h), and date time from NEO-6M GPS module. We also learn how to calculate the distance from current GPS position to a predefined GPS coordinates (ex. coordinates of London)

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×NEO-6M GPS module
n×Jumper Wires
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About NEO-6M GPS module

Pinout

The NEO-6M GPS module includes 4 pins:

  • VCC pin needs to be connected to VCC (5V)
  • GND pin needs to be connected to GND (0V)
  • TX pin is used for serial communication, needs to be connect to Serial (or SoftwareSerial) RX pin on Arduino.
  • RX pin is used for serial communication, needs to be connect to Serial (or SoftwareSerial) TX pin on Arduino.
  • NEO-6M GPS module Pinout

Wiring Diagram

Arduino GPS module Wiring Diagram

Image is developed using Fritzing. Click to enlarge image

Arduino Code

Reading GPS coordinates, speed (km/h), and date time

/* * Created by ArduinoGetStarted.com * * This example code is in the public domain * * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-gps */ #include <TinyGPS++.h> #include <SoftwareSerial.h> const int RXPin = 3, TXPin = 4; const uint32_t GPSBaud = 9600; //Default baud of NEO-6M is 9600 TinyGPSPlus gps; // the TinyGPS++ object SoftwareSerial gpsSerial(RXPin, TXPin); // the serial interface to the GPS device void setup() { Serial.begin(9600); gpsSerial.begin(GPSBaud); Serial.println(F("Arduino - GPS module")); } void loop() { if (gpsSerial.available() > 0) { if (gps.encode(gpsSerial.read())) { if (gps.location.isValid()) { Serial.print(F("- latitude: ")); Serial.println(gps.location.lat()); Serial.print(F("- longitude: ")); Serial.println(gps.location.lng()); Serial.print(F("- altitude: ")); if (gps.altitude.isValid()) Serial.println(gps.altitude.meters()); else Serial.println(F("INVALID")); } else { Serial.println(F("- location: INVALID")); } Serial.print(F("- speed: ")); 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: ")); 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(); } } if (millis() > 5000 && gps.charsProcessed() < 10) Serial.println(F("No GPS data received: check wiring")); }

Quick Steps

  • Download the TinyGPS++ library to any where on your PC
  • Open Arduino IDE
  • On Arduino IDE, Go to Sketch Include Library Add .ZIP Library...
  • Arduino IDE Add .zip file Library
  • Select the downloaded zip file, and then the library will be installed
  • Copy the above code and open with Arduino IDE
  • Click Upload button on Arduino IDE to upload code to Arduino
  • See the result on Serial Monitor:
  • COM6
    Send
    Autoscroll Show timestamp
    Clear output
    9600 baud  
    Newline  

Calculating the distance from current location to a predefined location

The below code calculates the distance between the current location and London (lat:51.508131 , long: -0.128002)

/* * Created by ArduinoGetStarted.com * * This example code is in the public domain * * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-gps */ #include <TinyGPS++.h> #include <SoftwareSerial.h> const int RXPin = 3, TXPin = 4; const uint32_t GPSBaud = 9600; //Default baud of NEO-6M is 9600 TinyGPSPlus gps; // the TinyGPS++ object SoftwareSerial gpsSerial(RXPin, TXPin); // the serial interface to the GPS device const double LONDON_LAT = 51.508131; const double LONDON_LON = -0.128002; void setup() { Serial.begin(9600); gpsSerial.begin(GPSBaud); Serial.println(F("Arduino - GPS module")); } void loop() { if (gpsSerial.available() > 0) { if (gps.encode(gpsSerial.read())) { if (gps.location.isValid()) { double latitude = gps.location.lat(); double longitude = gps.location.lng(); unsigned long distanceKm = TinyGPSPlus::distanceBetween(latitude, longitude, LONDON_LAT, LONDON_LON) / 1000; Serial.print(F("- latitude: ")); Serial.println(latitude); Serial.print(F("- longitude: ")); Serial.println(longitude); Serial.print(F("- distance to London: ")); Serial.println(distanceKm); } else { Serial.println(F("- location: INVALID")); } Serial.println(); } } if (millis() > 5000 && gps.charsProcessed() < 10) Serial.println(F("No GPS data received: check wiring")); }

Quick Steps

  • Copy the above code and open with Arduino IDE
  • Click Upload button on Arduino IDE to upload code to Arduino
  • See the result on Serial Monitor:
  • COM6
    Send
    Autoscroll Show timestamp
    Clear output
    9600 baud  
    Newline  

Video Tutorial

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