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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
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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.
Wiring Diagram
This image is created 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>
#define RX_PIN 4 // Arduino Pin connected to the TX of the GPS module
#define TX_PIN 3 // Arduino Pin connected to the RX of the GPS module
TinyGPSPlus gps; // the TinyGPS++ object
SoftwareSerial gpsSerial(RX_PIN, TX_PIN); // the serial interface to the GPS module
void setup() {
Serial.begin(9600);
gpsSerial.begin(9600); // Default baud of NEO-6M GPS module is 9600
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
- Open Arduino IDE
- Navigate to the Libraries icon on the left bar of the Arduino IDE.
- Search “TinyGPSPlus”, then find the TinyGPSPlus library by Mikal Hart
- Click Install button to install TinyGPSPlus library.
- 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
Autoscroll
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>
#define RX_PIN 4 // Arduino Pin connected to the TX of the GPS module
#define TX_PIN 3 // Arduino Pin connected to the RX of the GPS module
TinyGPSPlus gps; // the TinyGPS++ object
SoftwareSerial gpsSerial(RX_PIN, TX_PIN); // the serial interface to the GPS module
const double LONDON_LAT = 51.508131;
const double LONDON_LON = -0.128002;
void setup() {
Serial.begin(9600);
gpsSerial.begin(9600); // Default baud of NEO-6M GPS module is 9600
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
Autoscroll
Clear output
9600 baud
Newline
Video Tutorial
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WARNING
Note that this tutorial is incomplete. We will post on our Facebook Page when the tutorial is complete. Like it to get updated.
