Vehicle Location Tracker Using Arduino

step by step guide how you make vehicle location tracking system

Prateek 16/06/2023

0 10,181 3 minutes read

Introduction

The Vehicle Location Tracking System is an innovative solution that uses Arduino and it enables real-time tracking and remote control of a vehicle. This article will explain the completed process of the projects and explain all components in detail.

Circuit Components

S.N	Components	Quantity
1	Arduino Board	1
2	GSM module (SIM800l)	1
3	GPS module (NEO-6M)	1
4	Ignition switch (relay module)	1
5	Ignition sensor	1
6	100k,1M	1
7	9v Power Supply	1

Arduino Board

- The Arduino board is the control unit in the system.
- It is responsible for processing data, executing commands, and interacting with the GSM and GPS modules.

GSM Module (SIM800l)

- The GSM module facilitates communication with the vehicle using the Global System for Mobile Communications (GSM) network.
- It enables sending and receiving SMS messages, which allows for remote control and monitoring of the vehicle.
- The module is connected to the Arduino board to pin numbers 2 and 3.

GPS Module (NEO-6M)

- The GPS module integrates Global Positioning System (GPS) functionality into the tracking system.
- It receives signals from GPS satellites to determine the vehicle’s precise location coordinates.
- The module is connected to pin numbers 8 and 9.

Ignition Switch

- The ignition switch is a physical switch that controls the vehicle’s ignition system.
- It can be turned on or off remotely through SMS commands, providing control over the vehicle’s engine.

Ignition Sensor

- The ignition sensor is an analog sensor connected to the Arduino board.
- It measures the voltage or resistance associated with the vehicle’s ignition status.
- The sensor helps detect whether the ignition is on or off, enabling the system to monitor the vehicle’s status.

Resistor (10Ω) and Resistor (10kΩ)

- These resistors are used in conjunction with the ignition sensor.
- They create a voltage divider circuit to convert the analog signal from the ignition sensor into a measurable value.

12V Power Supply

- The tracking system requires a 9V power supply to operate the Arduino board, GSM module, GPS module, and other components.
- The power supply can be sourced from the vehicle’s battery or an external power source.

Circuit Diagram

GSM Module

- RX pin of the GSM module is connected to digital pin 11 (txPin) of Arduino.
- TX pin of the GSM module is connected to digital pin 10 (rxPin) of Arduino.
- The GSM module is powered and grounded appropriately.

GPS Module

- RX pin of the GPS module is connected to digital pin 9 of Arduino (AltSoftSerial library is used).
- TX pin of the GPS module is connected to digital pin 8 of Arduino.
- The GPS module is powered and grounded appropriately.

Ignition Relay

- One terminal of the ignition Relay is connected to digital pin 4 of Arduino.
- The other terminal of the ignition switch is connected to the ground.
- A pull-up or pull-down resistor may be necessary based on the switch type.

Ignition Sensor

- The ignition sensor is connected to analog pin A0 of Arduino.
- Appropriate 1M and 100k resistors and wiring may be required for proper sensor connections.

Code

Github

//Prateek
//https://justdoelectronics.com
//https://www.youtube.com/@JustDoElectronics

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

const String PHONE = "+9188305848xx";

#define ignition_switch 4
#define ignition_sensor A0

//GSM Module RX pin to Arduino 3
//GSM Module TX pin to Arduino 2
#define rxPin 2
#define txPin 3
SoftwareSerial sim800(rxPin, txPin);

//GPS Module RX pin to Arduino 9
//GPS Module TX pin to Arduino 8
AltSoftSerial neogps;

TinyGPSPlus gps;

String sms_status, sender_number, received_date, msg;
boolean ignition_status = false;
boolean tracking_status = false;
boolean reply_status = true;  
boolean anti_theft = false;

unsigned long previousMillis = 0;  
long interval = 60000;            

void setup() {
  delay(7000);
  Serial.begin(115200);

  sim800.begin(9600);
  neogps.begin(9600);

  pinMode(ignition_switch, OUTPUT);
  pinMode(ignition_sensor, INPUT);

  sms_status = "";
  sender_number = "";
  received_date = "";
  msg = "";

  sim800.println("AT");  
  delay(1000);
  sim800.println("ATE1");  
  delay(1000);
  sim800.println("AT+CPIN?"); 
  delay(1000);
  sim800.println("AT+CMGF=1"); 
  delay(1000);
  sim800.println("AT+CNMI=2,2,0,0,0"); 
  delay(1000);
}


void loop() {

  ignition_status = getIgnitionStatus();

  if (tracking_status == true && ignition_status == true) {
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis > interval) {
      previousMillis = currentMillis;
     
    }
  }
  if (anti_theft == true && ignition_status == true) {
    digitalWrite(ignition_switch, HIGH);
  }
 
  while (sim800.available()) {
    parseData(sim800.readString());
  }
 
  while (Serial.available()) {
    sim800.println(Serial.readString());
  }
  
}

void parseData(String buff) {
  Serial.println(buff);

  unsigned int len, index;
  index = buff.indexOf("\r");
  buff.remove(0, index + 2);
  buff.trim();
  if (buff != "OK") {
    index = buff.indexOf(":");
    String cmd = buff.substring(0, index);
    cmd.trim();

    buff.remove(0, index + 2);

    if (cmd == "+CMTI") {
      index = buff.indexOf(",");
      String temp = buff.substring(index + 1, buff.length());
      temp = "AT+CMGR=" + temp + "\r";
      sim800.println(temp);
    } else if (cmd == "+CMGR") {
      extractSms(buff);
      if (sender_number == PHONE) {
        doAction();
    
      }
    }
  } else {
    //The result of AT Command is "OK"
  }
}
void extractSms(String buff) {
  unsigned int index;
  Serial.println(buff);

  index = buff.indexOf(",");
  sms_status = buff.substring(1, index - 1);
  buff.remove(0, index + 2);

  sender_number = buff.substring(0, 13);
  buff.remove(0, 19);

  received_date = buff.substring(0, 20);
  buff.remove(0, buff.indexOf("\r"));
  buff.trim();

  index = buff.indexOf("\n\r");
  buff = buff.substring(0, index);
  buff.trim();
  msg = buff;
  buff = "";
  msg.toLowerCase();

  Serial.println(".........");
  Serial.println(sms_status);
  Serial.println(sender_number);
  Serial.println(received_date);
  Serial.println(msg);
  Serial.println(".........");
}

void doAction() {
  //case sensitive
  if (msg == "bike on") {
    digitalWrite(ignition_switch, HIGH);
    Serial.println("Bike has ON");
    if (reply_status == true) {
      sendSms("Bike has ON");
    }
  } else if (msg == "bike off") {
    digitalWrite(ignition_switch, LOW);
    Serial.println("Bike has OFF");
    if (reply_status == true) {
      sendSms("Bike has OFF");
    }
  } else if (msg == "get location") {
    sendSmsGPS("Location");
  } else if (msg == "anti theft on") {
    anti_theft = true;
    if (reply_status == true) {
      sendSms("Someone Trying to start your bike");
      sendSms("Bike Has OFF");
    }
  } else if (msg == "anti theft off") {
    anti_theft = false;
    if (reply_status == true) {
      sendSms("Anti-Theft has OFF");
    }

    else if (msg == "reply on") {
      reply_status = true;
      sendSms("Reply has ON");
    }

    else if (msg == "reply off") {
      reply_status = false;
    }
  } else if (msg == "tracking on") {
    tracking_status = true;
    if (reply_status == true) {
      sendSms("Live Tracking has ON");
    }
  }
  //yet to be implemented
  else if (msg == "tracking off") {
    tracking_status = false;
    if (reply_status == true) {
      sendSms("Live Tracking has OFF");
    }
  } else if (msg == "tracking status") {
    if (tracking_status == false) {
      sendSms("Live Tracking has OFF");
    } else {
      sendSms("Live Tracking has ON");
    }
  }
  sms_status = "";
  sender_number = "";
  received_date = "";
  msg = "";
}
void deleteSms() {
  sendATcommand("AT+CMGD=1,4", "OK", 2000);
  Serial.println("All SMS are deleted.");
}
void sendSmsGPS(String text) {
  // Can take up to 60 seconds
  boolean newData = false;
  for (unsigned long start = millis(); millis() - start < 2000;) {
    while (neogps.available()) {
      if (gps.encode(neogps.read())) {
        newData = true;
      }
    }
  }
  if (newData) 
  {
    float flat, flon;
    unsigned long age;
    Serial.print("Latitude= ");
    Serial.print(gps.location.lat(), 6);
    Serial.print(" Longitude= ");
    Serial.println(gps.location.lng(), 6);
    newData = false;
    delay(300);
    ///*
    sim800.print("AT+CMGF=1\r");
    delay(1000);
    sim800.print("AT+CMGS=\"" + PHONE + "\"\r");
    delay(1000);
    sim800.print("http://maps.google.com/maps?q=loc:");
    sim800.print(gps.location.lat(), 6);
    sim800.print(",");
    sim800.print(gps.location.lng(), 6);
    delay(100);
    sim800.write(0x1A);  
    delay(1000);
   
  }
}
void sendSms(String text) {
  sim800.print("AT+CMGF=1\r");
  delay(1000);
  sim800.print("AT+CMGS=\"" + PHONE + "\"\r");
  delay(1000);
  sim800.print(text);
  delay(100);
  sim800.write(0x1A); 
  delay(1000);
  Serial.println("SMS Sent Successfully.");
}
int8_t sendATcommand(char* ATcommand, char* expected_answer, unsigned int timeout) {

  uint8_t x = 0, answer = 0;
  char response[100];
  unsigned long previous;

  memset(response, '\0', 100);

  delay(100);

  while (sim800.available() > 0) sim800.read();

  if (ATcommand[0] != '\0') {
    sim800.println(ATcommand);
  }


  x = 0;
  previous = millis();
  do {
    if (sim800.available() != 0) {
      response[x] = sim800.read();
      x++;
      if (strstr(response, expected_answer) != NULL) {
        answer = 1;
      }
    }
  } while ((answer == 0) && ((millis() - previous) < timeout));

  return answer;
}

boolean getIgnitionStatus() {
  float val = 0;
  for (int i = 1; i <= 10; i++) { val = val + analogRead(ignition_sensor); }
  val = val / 10;
  //Serial.println(val);
  if (val > 90) {
    return true;
  } else if (val < 50) {
    return false;
  }
}
void setIgnition() {
  ignition_status = getIgnitionStatus;
  if (ignition_status == false) {
    sim800.print("AT");
    sendATcommand("AT+CSCLK=0", "OK", 1000);
  } else if (ignition_status == true) {
    sendATcommand("AT+CSCLK=2", "OK", 1000);
  }
}

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//Prateek

//https://justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics

#include <SoftwareSerial.h>

#include <AltSoftSerial.h>

#include <TinyGPS++.h>

const String PHONE = "+9188305848xx";

#define ignition_switch 4

#define ignition_sensor A0

//GSM Module RX pin to Arduino 3

//GSM Module TX pin to Arduino 2

#define rxPin 2

#define txPin 3

SoftwareSerial sim800(rxPin, txPin);

//GPS Module RX pin to Arduino 9

//GPS Module TX pin to Arduino 8

AltSoftSerial neogps;

TinyGPSPlus gps;

String sms_status, sender_number, received_date, msg;

boolean ignition_status = false;

boolean tracking_status = false;

boolean reply_status = true;

boolean anti_theft = false;

unsigned long previousMillis = 0;

long interval = 60000;

void setup() {

delay(7000);

Serial.begin(115200);

sim800.begin(9600);

neogps.begin(9600);

pinMode(ignition_switch, OUTPUT);

pinMode(ignition_sensor, INPUT);

sms_status = "";

sender_number = "";

received_date = "";

msg = "";

sim800.println("AT");

delay(1000);

sim800.println("ATE1");

delay(1000);

sim800.println("AT+CPIN?");

delay(1000);

sim800.println("AT+CMGF=1");

delay(1000);

sim800.println("AT+CNMI=2,2,0,0,0");

delay(1000);

}

void loop() {

ignition_status = getIgnitionStatus();

if (tracking_status == true && ignition_status == true) {

unsigned long currentMillis = millis();

if (currentMillis - previousMillis > interval) {

previousMillis = currentMillis;

}

if (anti_theft == true && ignition_status == true) {

digitalWrite(ignition_switch, HIGH);

}

while (sim800.available()) {

parseData(sim800.readString());

}

while (Serial.available()) {

sim800.println(Serial.readString());

}

void parseData(String buff) {

Serial.println(buff);

unsigned int len, index;

index = buff.indexOf("\r");

buff.remove(0, index + 2);

buff.trim();

if (buff != "OK") {

index = buff.indexOf(":");

String cmd = buff.substring(0, index);

cmd.trim();

buff.remove(0, index + 2);

if (cmd == "+CMTI") {

index = buff.indexOf(",");

String temp = buff.substring(index + 1, buff.length());

temp = "AT+CMGR=" + temp + "\r";

sim800.println(temp);

} else if (cmd == "+CMGR") {

extractSms(buff);

if (sender_number == PHONE) {

doAction();

}

} else {

//The result of AT Command is "OK"

}

void extractSms(String buff) {

unsigned int index;

Serial.println(buff);

index = buff.indexOf(",");

sms_status = buff.substring(1, index - 1);

buff.remove(0, index + 2);

sender_number = buff.substring(0, 13);

buff.remove(0, 19);

received_date = buff.substring(0, 20);

buff.remove(0, buff.indexOf("\r"));

buff.trim();

index = buff.indexOf("\n\r");

buff = buff.substring(0, index);

buff.trim();

msg = buff;

buff = "";

msg.toLowerCase();

Serial.println(".........");

Serial.println(sms_status);

Serial.println(sender_number);

Serial.println(received_date);

Serial.println(msg);

Serial.println(".........");

}

void doAction() {

//case sensitive

if (msg == "bike on") {

digitalWrite(ignition_switch, HIGH);

Serial.println("Bike has ON");

if (reply_status == true) {

sendSms("Bike has ON");

}

} else if (msg == "bike off") {

digitalWrite(ignition_switch, LOW);

Serial.println("Bike has OFF");

if (reply_status == true) {

sendSms("Bike has OFF");

}

} else if (msg == "get location") {

sendSmsGPS("Location");

} else if (msg == "anti theft on") {

anti_theft = true;

if (reply_status == true) {

sendSms("Someone Trying to start your bike");

sendSms("Bike Has OFF");

}

} else if (msg == "anti theft off") {

anti_theft = false;

if (reply_status == true) {

sendSms("Anti-Theft has OFF");

}

else if (msg == "reply on") {

reply_status = true;

sendSms("Reply has ON");

}

else if (msg == "reply off") {

reply_status = false;

}

} else if (msg == "tracking on") {

tracking_status = true;

if (reply_status == true) {

sendSms("Live Tracking has ON");

}

//yet to be implemented

else if (msg == "tracking off") {

tracking_status = false;

if (reply_status == true) {

sendSms("Live Tracking has OFF");

}

} else if (msg == "tracking status") {

if (tracking_status == false) {

sendSms("Live Tracking has OFF");

} else {

sendSms("Live Tracking has ON");

}

sms_status = "";

sender_number = "";

received_date = "";

msg = "";

}

void deleteSms() {

sendATcommand("AT+CMGD=1,4", "OK", 2000);

Serial.println("All SMS are deleted.");

}

void sendSmsGPS(String text) {

// Can take up to 60 seconds

boolean newData = false;

for (unsigned long start = millis(); millis() - start < 2000;) {

while (neogps.available()) {

if (gps.encode(neogps.read())) {

newData = true;

}

if (newData)

{

float flat, flon;

unsigned long age;

Serial.print("Latitude= ");

Serial.print(gps.location.lat(), 6);

Serial.print(" Longitude= ");

Serial.println(gps.location.lng(), 6);

newData = false;

delay(300);

///*

sim800.print("AT+CMGF=1\r");

delay(1000);

sim800.print("AT+CMGS=\"" + PHONE + "\"\r");

delay(1000);

sim800.print("http://maps.google.com/maps?q=loc:");

sim800.print(gps.location.lat(), 6);

sim800.print(",");

sim800.print(gps.location.lng(), 6);

delay(100);

sim800.write(0x1A);

delay(1000);

}

void sendSms(String text) {

sim800.print("AT+CMGF=1\r");

delay(1000);

sim800.print("AT+CMGS=\"" + PHONE + "\"\r");

delay(1000);

sim800.print(text);

delay(100);

sim800.write(0x1A);

delay(1000);

Serial.println("SMS Sent Successfully.");

}

int8_t sendATcommand(char* ATcommand, char* expected_answer, unsigned int timeout) {

uint8_t x = 0, answer = 0;

char response[100];

unsigned long previous;

memset(response, '\0', 100);

delay(100);

while (sim800.available() > 0) sim800.read();

if (ATcommand[0] != '\0') {

sim800.println(ATcommand);

}

x = 0;

previous = millis();

do {

if (sim800.available() != 0) {

response[x] = sim800.read();

x++;

if (strstr(response, expected_answer) != NULL) {

answer = 1;

}

} while ((answer == 0) && ((millis() - previous) < timeout));

return answer;

}

boolean getIgnitionStatus() {

float val = 0;

for (int i = 1; i <= 10; i++) { val = val + analogRead(ignition_sensor); }

val = val / 10;

//Serial.println(val);

if (val > 90) {

return true;

} else if (val < 50) {

return false;

}

void setIgnition() {

ignition_status = getIgnitionStatus;

if (ignition_status == false) {

sim800.print("AT");

sendATcommand("AT+CSCLK=0", "OK", 1000);

} else if (ignition_status == true) {

sendATcommand("AT+CSCLK=2", "OK", 1000);

}

Libraries Required

SoftwareSerial.h and AltSoftSerial.h These libraries enable serial communication with the GSM and GPS modules.
TinyGPS++.h This library provides GPS parsing functionality.

Pin Definitions

- neogpsAn instance of the AltSoftSerial library for GPS module communication.

#define ignition_switch 4
#define ignition_sensor A0

//GSM Module RX pin to Arduino 3
//GSM Module TX pin to Arduino 2
#define rxPin 2
#define txPin 3
SoftwareSerial sim800(rxPin, txPin);

//GPS Module RX pin to Arduino 9
//GPS Module TX pin to Arduino 8
AltSoftSerial neogps;

#define ignition_switch 4

#define ignition_sensor A0

//GSM Module RX pin to Arduino 3

//GSM Module TX pin to Arduino 2

#define rxPin 2

#define txPin 3

SoftwareSerial sim800(rxPin, txPin);

//GPS Module RX pin to Arduino 9

//GPS Module TX pin to Arduino 8

AltSoftSerial neogps;

Global Variables

- Various boolean and string variables are used to store status, phone numbers, received SMS details, and messages.

unsigned long previousMillis = 0;  
long interval = 60000;

1 2	unsigned long previousMillis = 0; long interval = 60000;

`setup()` function

- Sets the pinMode for the ignition switch and ignition sensor.
- Sends AT commands to the GSM module to configure settings.

void setup() {
  delay(7000);
  Serial.begin(115200);

  sim800.begin(9600);
  neogps.begin(9600);

  pinMode(ignition_switch, OUTPUT);
  pinMode(ignition_sensor, INPUT);

  sms_status = "";
  sender_number = "";
  received_date = "";
  msg = "";

  sim800.println("AT");  
  delay(1000);
  sim800.println("ATE1");  
  delay(1000);
  sim800.println("AT+CPIN?"); 
  delay(1000);
  sim800.println("AT+CMGF=1"); 
  delay(1000);
  sim800.println("AT+CNMI=2,2,0,0,0"); 
  delay(1000);
}

void setup() {

delay(7000);

Serial.begin(115200);

sim800.begin(9600);

neogps.begin(9600);

pinMode(ignition_switch, OUTPUT);

pinMode(ignition_sensor, INPUT);

sms_status = "";

sender_number = "";

received_date = "";

msg = "";

sim800.println("AT");

delay(1000);

sim800.println("ATE1");

delay(1000);

sim800.println("AT+CPIN?");

delay(1000);

sim800.println("AT+CMGF=1");

delay(1000);

sim800.println("AT+CNMI=2,2,0,0,0");

delay(1000);

}

`loop()` function

- Checks the ignition status and perform different actions based on the tracking and anti-theft statuses.
- Sends GPS coordinates to the server at regular intervals when tracking is enabled.

void loop() {

  ignition_status = getIgnitionStatus();

  if (tracking_status == true && ignition_status == true) {
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis > interval) {
      previousMillis = currentMillis;
      sendGpsToServer();
    }
  }
  if (anti_theft == true && ignition_status == true) {
    digitalWrite(ignition_switch, HIGH);
  }
 
  while (sim800.available()) {
    parseData(sim800.readString());
  }
 
  while (Serial.available()) {
    sim800.println(Serial.readString());
  }
  
}

void loop() {

ignition_status = getIgnitionStatus();

if (tracking_status == true && ignition_status == true) {

unsigned long currentMillis = millis();

if (currentMillis - previousMillis > interval) {

previousMillis = currentMillis;

sendGpsToServer();

}

if (anti_theft == true && ignition_status == true) {

digitalWrite(ignition_switch, HIGH);

}

while (sim800.available()) {

parseData(sim800.readString());

}

while (Serial.available()) {

sim800.println(Serial.readString());

}

`parseData()` function

- Processes the response received from the GSM module.
- Extracts SMS information and calls the extractSms() function.

void parseData(String buff) {
  Serial.println(buff);

  unsigned int len, index;
  index = buff.indexOf("\r");
  buff.remove(0, index + 2);
  buff.trim();
  if (buff != "OK") {
    index = buff.indexOf(":");
    String cmd = buff.substring(0, index);
    cmd.trim();

    buff.remove(0, index + 2);

    if (cmd == "+CMTI") {
      index = buff.indexOf(",");
      String temp = buff.substring(index + 1, buff.length());
      temp = "AT+CMGR=" + temp + "\r";
      sim800.println(temp);
    } else if (cmd == "+CMGR") {
      extractSms(buff);
      if (sender_number == PHONE) {
        doAction();
    
      }
    }
  } else {
    //The result of AT Command is "OK"
  }
}

void parseData(String buff) {

Serial.println(buff);

unsigned int len, index;

index = buff.indexOf("\r");

buff.remove(0, index + 2);

buff.trim();

if (buff != "OK") {

index = buff.indexOf(":");

String cmd = buff.substring(0, index);

cmd.trim();

buff.remove(0, index + 2);

if (cmd == "+CMTI") {

index = buff.indexOf(",");

String temp = buff.substring(index + 1, buff.length());

temp = "AT+CMGR=" + temp + "\r";

sim800.println(temp);

} else if (cmd == "+CMGR") {

extractSms(buff);

if (sender_number == PHONE) {

doAction();

}

} else {

//The result of AT Command is "OK"

}

`extractSms()` function

- Extracts and stores information from the received SMS messages, such as status, sender number, date, and message content.

void extractSms(String buff) {
  unsigned int index;
  Serial.println(buff);

  index = buff.indexOf(",");
  sms_status = buff.substring(1, index - 1);
  buff.remove(0, index + 2);

  sender_number = buff.substring(0, 13);
  buff.remove(0, 19);

  received_date = buff.substring(0, 20);
  buff.remove(0, buff.indexOf("\r"));
  buff.trim();

  index = buff.indexOf("\n\r");
  buff = buff.substring(0, index);
  buff.trim();
  msg = buff;
  buff = "";
  msg.toLowerCase();

  Serial.println(".........");
  Serial.println(sms_status);
  Serial.println(sender_number);
  Serial.println(received_date);
  Serial.println(msg);
  Serial.println(".........");
}

void extractSms(String buff) {

unsigned int index;

Serial.println(buff);

index = buff.indexOf(",");

sms_status = buff.substring(1, index - 1);

buff.remove(0, index + 2);

sender_number = buff.substring(0, 13);

buff.remove(0, 19);

received_date = buff.substring(0, 20);

buff.remove(0, buff.indexOf("\r"));

buff.trim();

index = buff.indexOf("\n\r");

buff = buff.substring(0, index);

buff.trim();

msg = buff;

buff = "";

msg.toLowerCase();

Serial.println(".........");

Serial.println(sms_status);

Serial.println(sender_number);

Serial.println(received_date);

Serial.println(msg);

Serial.println(".........");

}

doAction() function

- Performs different actions based on the received SMS message.
- Controls the ignition switch, sends SMS responses, and toggles tracking and anti-theft statuses.

void doAction() {
  if (msg == "bike on") {
    digitalWrite(ignition_switch, HIGH);
    Serial.println("Bike has ON");
    if (reply_status == true) {
      sendSms("Bike has ON");
    }
  } else if (msg == "bike off") {
    digitalWrite(ignition_switch, LOW);
    Serial.println("Bike has OFF");
    if (reply_status == true) {
      sendSms("Bike has OFF");
    }
  } else if (msg == "get location") {
    sendSmsGPS("Location");
  } else if (msg == "anti theft on") {
    anti_theft = true;
    if (reply_status == true) {
      sendSms("Someone Trying to start your bike");
      sendSms("Bike Has OFF");
    }
  } else if (msg == "anti theft off") {
    anti_theft = false;
    if (reply_status == true) {
      sendSms("Anti-Theft has OFF");
    }

    else if (msg == "reply on") {
      reply_status = true;
      sendSms("Reply has ON");
    }

    else if (msg == "reply off") {
      reply_status = false;
    }
  } else if (msg == "tracking on") {
    tracking_status = true;
    if (reply_status == true) {
      sendSms("Live Tracking has ON");
    }
  }
  //yet to be implemented
  else if (msg == "tracking off") {
    tracking_status = false;
    if (reply_status == true) {
      sendSms("Live Tracking has OFF");
    }
  } else if (msg == "tracking status") {
    if (tracking_status == false) {
      sendSms("Live Tracking has OFF");
    } else {
      sendSms("Live Tracking has ON");
    }
  }
  sms_status = "";
  sender_number = "";
  received_date = "";
  msg = "";
}

void doAction() {

if (msg == "bike on") {

digitalWrite(ignition_switch, HIGH);

Serial.println("Bike has ON");

if (reply_status == true) {

sendSms("Bike has ON");

}

} else if (msg == "bike off") {

digitalWrite(ignition_switch, LOW);

Serial.println("Bike has OFF");

if (reply_status == true) {

sendSms("Bike has OFF");

}

} else if (msg == "get location") {

sendSmsGPS("Location");

} else if (msg == "anti theft on") {

anti_theft = true;

if (reply_status == true) {

sendSms("Someone Trying to start your bike");

sendSms("Bike Has OFF");

}

} else if (msg == "anti theft off") {

anti_theft = false;

if (reply_status == true) {

sendSms("Anti-Theft has OFF");

}

else if (msg == "reply on") {

reply_status = true;

sendSms("Reply has ON");

}

else if (msg == "reply off") {

reply_status = false;

}

} else if (msg == "tracking on") {

tracking_status = true;

if (reply_status == true) {

sendSms("Live Tracking has ON");

}

//yet to be implemented

else if (msg == "tracking off") {

tracking_status = false;

if (reply_status == true) {

sendSms("Live Tracking has OFF");

}

} else if (msg == "tracking status") {

if (tracking_status == false) {

sendSms("Live Tracking has OFF");

} else {

sendSms("Live Tracking has ON");

}

sms_status = "";

sender_number = "";

received_date = "";

msg = "";

}

Other Helper Functions

- deleteSms(): Deletes all SMS messages.

void deleteSms() {
  sendATcommand("AT+CMGD=1,4", "OK", 2000);
  Serial.println("All SMS are deleted.");
}

void deleteSms() {

sendATcommand("AT+CMGD=1,4", "OK", 2000);

Serial.println("All SMS are deleted.");

}

- sendSmsGPS(): Sends an SMS message containing the GPS location.

void sendSmsGPS(String text) {
  // Can take up to 60 seconds
  boolean newData = false;
  for (unsigned long start = millis(); millis() - start < 2000;) {
    while (neogps.available()) {
      if (gps.encode(neogps.read())) {
        newData = true;
      }
    }
  }
  if (newData) 
  {
    float flat, flon;
    unsigned long age;
    Serial.print("Latitude= ");
    Serial.print(gps.location.lat(), 6);
    Serial.print(" Longitude= ");
    Serial.println(gps.location.lng(), 6);
    newData = false;
    delay(300);
    ///*
    sim800.print("AT+CMGF=1\r");
    delay(1000);
    sim800.print("AT+CMGS=\"" + PHONE + "\"\r");
    delay(1000);
    sim800.print("http://maps.google.com/maps?q=loc:");
    sim800.print(gps.location.lat(), 6);
    sim800.print(",");
    sim800.print(gps.location.lng(), 6);
    delay(100);
    sim800.write(0x1A);  
    delay(1000);
   
  }
}

void sendSmsGPS(String text) {

// Can take up to 60 seconds

boolean newData = false;

for (unsigned long start = millis(); millis() - start < 2000;) {

while (neogps.available()) {

if (gps.encode(neogps.read())) {

newData = true;

}

if (newData)

{

float flat, flon;

unsigned long age;

Serial.print("Latitude= ");

Serial.print(gps.location.lat(), 6);

Serial.print(" Longitude= ");

Serial.println(gps.location.lng(), 6);

newData = false;

delay(300);

///*

sim800.print("AT+CMGF=1\r");

delay(1000);

sim800.print("AT+CMGS=\"" + PHONE + "\"\r");

delay(1000);

sim800.print("http://maps.google.com/maps?q=loc:");

sim800.print(gps.location.lat(), 6);

sim800.print(",");

sim800.print(gps.location.lng(), 6);

delay(100);

sim800.write(0x1A);

delay(1000);

}

- sendSms(): Sends a general SMS message.

void sendSms(String text) {
  sim800.print("AT+CMGF=1\r");
  delay(1000);
  sim800.print("AT+CMGS=\"" + PHONE + "\"\r");
  delay(1000);
  sim800.print(text);
  delay(100);
  sim800.write(0x1A); 
  delay(1000);
  Serial.println("SMS Sent Successfully.");
}
int8_t sendATcommand(char* ATcommand, char* expected_answer, unsigned int timeout) {

  uint8_t x = 0, answer = 0;
  char response[100];
  unsigned long previous;

  memset(response, '\0', 100);

  delay(100);

  while (sim800.available() > 0) sim800.read();

  if (ATcommand[0] != '\0') {
    sim800.println(ATcommand);
  }


  x = 0;
  previous = millis();
  do {
    if (sim800.available() != 0) {
      response[x] = sim800.read();
      x++;
      if (strstr(response, expected_answer) != NULL) {
        answer = 1;
      }
    }
  } while ((answer == 0) && ((millis() - previous) < timeout));

  return answer;
}

boolean getIgnitionStatus() {
  float val = 0;
  for (int i = 1; i <= 10; i++) { val = val + analogRead(ignition_sensor); }
  val = val / 10;
  //Serial.println(val);
  if (val > 90) {
    return true;
  } else if (val < 50) {
    return false;
  }
}

void sendSms(String text) {

sim800.print("AT+CMGF=1\r");

delay(1000);

sim800.print("AT+CMGS=\"" + PHONE + "\"\r");

delay(1000);

sim800.print(text);

delay(100);

sim800.write(0x1A);

delay(1000);

Serial.println("SMS Sent Successfully.");

}

int8_t sendATcommand(char* ATcommand, char* expected_answer, unsigned int timeout) {

uint8_t x = 0, answer = 0;

char response[100];

unsigned long previous;

memset(response, '\0', 100);

delay(100);

while (sim800.available() > 0) sim800.read();

if (ATcommand[0] != '\0') {

sim800.println(ATcommand);

}

x = 0;

previous = millis();

do {

if (sim800.available() != 0) {

response[x] = sim800.read();

x++;

if (strstr(response, expected_answer) != NULL) {

answer = 1;

}

} while ((answer == 0) && ((millis() - previous) < timeout));

return answer;

}

boolean getIgnitionStatus() {

float val = 0;

for (int i = 1; i <= 10; i++) { val = val + analogRead(ignition_sensor); }

val = val / 10;

//Serial.println(val);

if (val > 90) {

return true;

} else if (val < 50) {

return false;

}

- setIgnition(): Sets the ignition status based on the ignition sensor reading.

void setIgnition() {
  ignition_status = getIgnitionStatus;
  if (ignition_status == false) {
    sim800.print("AT");
    sendATcommand("AT+CSCLK=0", "OK", 1000);
  } else if (ignition_status == true) {
    sendATcommand("AT+CSCLK=2", "OK", 1000);
  }
}

void setIgnition() {

ignition_status = getIgnitionStatus;

if (ignition_status == false) {

sim800.print("AT");

sendATcommand("AT+CSCLK=0", "OK", 1000);

} else if (ignition_status == true) {

sendATcommand("AT+CSCLK=2", "OK", 1000);

}

After Uploading the code just open the Serial Monitor

Video

Conclusion

Here we make the real-time location information tracker, and also we sensor notifications to vehicle owners if anything happens. This is used in various fields but in this article, we only show the Vehicle Location Tracking System.

More Arduino Tutorial

Introduction

Circuit Components

Arduino Board

GSM Module (SIM800l)

GPS Module (NEO-6M)

Ignition Switch

Ignition Sensor

12V Power Supply

Circuit Diagram

Code

Libraries Required

Pin Definitions

Global Variables

setup() function

loop() function

parseData() function

extractSms() function

Other Helper Functions

Video

Conclusion

Prateek

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`setup()` function

`loop()` function

`parseData()` function

`extractSms()` function