Description:

This is a a location tracker using Arduino which sends its exact location to specific phone number. Here NEO 6M GPS Module is used to get location in latitude and longitude. SIM900A GSM Module with a SIM Cards is used to send the location SMS to the desired phone number/phone number which is added in the program code. Everything is controlled using Arduino UNO, other Arduinos can be used as well.

Circuit Diagram:

Components:

SR. NO.	COMPONENT	PINOUT DIAGRAM	BUY
1	Arduino UNO (Other Arduinos can be used too)	Arduino UNO Pinout Diagram⇗
2	NEO 6M GPS Module
3	SIM900A GSM Module
4	SIM Card with an active SMS Pack
5	10K Ohm Resistor
6	Push Button x 1

Steps and Info:

1. Get correct components as given. You can buy online or offline. I buy electronics components mostly from Amazon.

2. Start connecting the components. If you are new to connecting components in an electronic circuit, then use a Breadboard or you can straight up make connections using Jumper wires but it will create problem when there will be two or more connections needed at one pin (for example two or more different sensors 5V connection to Arduino’s 5V pin). But before soldering components on a PCB or printing a PCB for your circuit, better try using breadboard so that any errors and mistakes can be observed on breadboard and not after soldering. Or do connections in your way.

3. Now after building the circuit, download the Arduino IDE from https://www.arduino.cc/ website.

4. If you are new to Arduino IDE software, then watch this video we made specially for beginners about Arduino IDE.

5. If you know Arduino IDE then straight up copy the code we given and paste it into the Arduino IDE sketch. Also add your country code and phone number in the code to which you will be sending the SMS.

6. Connect the Arduino to your Computer/device. Select a proper port, proper Arduino type and whatever other settings are. Here it is Arduino UNO. (If you don’t know what this all is then watch our video: ).

7. Compile the code and Upload it.

8. If any error occurs then try to troubleshoot it by finding/copy-pasting it into our Solve Errors page https://electronicsprojects.in/solve-errors/, or you can straight up paste the error on Internet and you know the rest. Also check if there are no spelling/syntax errors in the code. Compile the code again once to check if errors are fixed. I have given proper connections and code but still nothing is perfect.

9. Once code compiles and uploads smoothly, you can start testing the working of your circuit/project.

10. You can use 2G, 3G and 4G SIM Cards for SIM900A GSM Module. Keep an active SMS pack on the SIM Card which is inserted in the SIM900A GSM Module.

11. For testing, take your NEO 6M GPS Module open to sky. Power up the Arduino using Power Bank/Laptop/12V Battery (+ pin to Vin and – pin to GND).

12. Press the Push Button to check if SMS comes to the Phone number or not. It will take little time for the GPS Module to detect the satellite.

13. NEO 6M GPS Module may need 5v supply from Arduino, still first try with 3.3v, if doesn’t work then go for 5v.

14: If the thing doesn’t work then check connections and code. Also you can talk with me and the community through discord. All the links to social is given at the right side of this page.

Program Code:

/* https://www.electronicsprojects.in Location Tracker using Arduino, NEO 6M GPS Module and SIM900A GSM Module */

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

float lati, longi;

TinyGPS gps;
SoftwareSerial sgps(4, 5);
SoftwareSerial sgsm(2, 3);

void setup()
{
sgsm.begin(9600);
sgps.begin(9600);
}
void loop()
{
sgps.listen();
while (sgps.available())
{
int c = sgps.read();
if (gps.encode(c))
{
gps.f_get_position(&lati, &longi);
}
}
sgsm.listen();
if (sgsm.available() > 0) {
String    c = sgsm.readString();
c.trim();
if (c.indexOf("GET-GPS") >= 0) {
sgsm.print("\r");
delay(1000);
sgsm.print("AT+CMGF=1\r");
delay(1000);
sgsm.print("AT+CMGS=\"+ZZXXXXXXXXXX\"\r"); /*Add your country code instead of ZZ and Add the phone number on which you want to send the SMS by removing XXXXXXXXXX */
delay(1000);
sgsm.print("Latitude :");
sgsm.println(lati, 6);
sgsm.print("Longitude:");
sgsm.println(longi, 6);
delay(1000);
sgsm.write(0x1A);
delay(1000);
}
}
}

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