Introduction

This tutorial demonstrates how to build a GPS data logger using Arduino. You'll learn to interface a GPS module and SD card reader for real-time data logging of location coordinates.

Required Components

• Arduino Uno
• GPS Module (e.g., Neo-6M)
• SD Card Module
• Micro SD Card (formatted to FAT32)
• Jumper Wires
• Breadboard
• Power Supply

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Wiring Diagram

Arduino Code

#include 
#include 
#include 
#include 

// Define connections
SoftwareSerial gpsSerial(4, 3); // RX, TX
TinyGPSPlus gps;

// SD card
const int chipSelect = 10;

void setup() {
    Serial.begin(9600);
    gpsSerial.begin(9600);
    if (!SD.begin(chipSelect)) {
        Serial.println("SD Card initialization failed!");
        return;
    }
    Serial.println("SD Card initialized.");
}

void loop() {
    while (gpsSerial.available() > 0) {
        gps.encode(gpsSerial.read());
        if (gps.location.isUpdated()) {
            String data = "Lat: " + String(gps.location.lat(), 6) +
                          ", Lng: " + String(gps.location.lng(), 6);
            Serial.println(data);
            File logFile = SD.open("gpslog.txt", FILE_WRITE);
            if (logFile) {
                logFile.println(data);
                logFile.close();
            }
        }
    }
}
            

Conclusion

By following this tutorial, you can log GPS coordinates to an SD card for tracking and analysis. This setup is versatile and can be expanded for advanced projects like vehicle tracking or geofencing applications.