CAR TRACKER USING SIM900 AND GPS NEO-6M

This project will talk about car tracking device. The device will be installed in hidden place, somewhere inside car. It will be equipped with SIM card. The owner of the car will give a call to the number installed on this device. Once call received, the device will send its location thru SMS. The message is linked to google map to find accurate location.

BILL OF MATERIAL

• Arduino UNO x 1
• SIM900 GSM/GPRS Shield x 1
• Ublox-NEO-6M-GPS-Module x 1
• SIM Card x 1
• Power Supply Module x 1

Assemble the circuit as wiring diagram

#include <TinyGPS++.h>
#include <SoftwareSerial.h>
#include <TimeLib.h>
#define time_offset 10800 // Local time is UTC+3, so 10800 is 3hrs in sec, change based on your location

SoftwareSerial SIM900(7, 8);
char incoming_char = 0;
String gMap = "http://www.google.com/maps/place/";
double Latitude, Longitude, Altitude, speed;
boolean GPSstatus = false;
static const uint32_t GPSBaud = 9600;
TinyGPSPlus gps; // The TinyGPS++ object

char Time[]  = "00:00:00";
char Date[]  = "00-00-2000";
String nameofday;
int Year;
byte last_second , Month, Day, Hour, Minute, Second;
String DateString = "";

void SIM900power()
{
  pinMode(9, OUTPUT); 
  digitalWrite(9,LOW);
  delay(1000);
  digitalWrite(9,HIGH);
  delay(2000);
  digitalWrite(9,LOW);
  delay(3000);
}

void setup() {
  SIM900power();
  SIM900.begin(9600); // for GSM shield
  Serial.begin(9600); // For serial monitor<br>  delay(20000);  // Give time to log on to network.<br>  SIM900.print("AT+CLIP=1\r"); // turn on caller ID notification
  delay(100);
}

void loop() {

  while (Serial.available() > 0)
    if (gps.encode(Serial.read()))
      getGPSdata();

  // Display any text that the GSM shield sends out on the serial monitor
  if (SIM900.available() > 0) {
    // Get the character from the cellular serial port
    // With an incomming call, a "RING" message is sent out
    incoming_char = SIM900.read();
    //  Check if the shield is sending a "RING" message
    if (incoming_char == 'R') {
      delay(10);
      Serial.print(incoming_char);
      incoming_char = SIM900.read();
      if (incoming_char == 'I') {
        delay(10);
        Serial.print(incoming_char);
        incoming_char = SIM900.read();
        if (incoming_char == 'N') {
          delay(10);
          Serial.print(incoming_char);
          incoming_char = SIM900.read();
          if (incoming_char == 'G') {
            delay(10);
            Serial.print(incoming_char);
            // If the message received from the shield is RING
            // Wait till call is confirmed received
            delay(1000);
            SIM900.println("ATH"); // hang up
            if (Latitude + Longitude == 0) {
              No_GPS_Message();
            }
            else {
              Valid_GPS_Message();
            }
          }
        }
      }
    }
  }
}
void Valid_GPS_Message()
{
  dateString(); //include time stamp
  SIM900.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000);  
  SIM900.println("AT+CMGS=\"+xxxxxxxxxxx\"\r"); // Replace x with mobile number+Country Code
  delay(1000);
  SIM900.println(dateString()); 
  delay(100);
  SIM900.print(gMap); 
  delay(100);
  SIM900.print(Latitude, 6);// 6 digit has to be defined, otherwaise only 2 digit is displayed
  delay(100);
  SIM900.print(",");
  delay(100);
  SIM900.println(Longitude, 6);// 6 digit has to be defined, otherwaise only 2 digit is displayed
  delay(100);
  SIM900.println((char)26);// ASCII code of CTRL+Z
  delay(1000);
}

void No_GPS_Message()
{
  SIM900.println("AT+CMGF=1");    //Sets the GSM Module in Text Mode
  delay(1000); 
  SIM900.println("AT+CMGS=\"+xxxxxxxxxxx\"\r"); // Replace x with mobile number
  delay(1000);
  SIM900.println("GPS DATA NOT AVAILABLE");
  delay(100);
  SIM900.println("PLEASE TRY LATER");
  delay(100);
  SIM900.println((char)26);// ASCII code of CTRL+Z
  delay(1000);
}
void getGPSdata() {
  if (gps.location.isValid()) {
    Latitude = gps.location.lat(), 6; // Latitude in degrees (double)
    Longitude = gps.location.lng(), 6; // Longitude in degrees (double)
    GPSstatus =  true;
  }
  else
    GPSstatus =  false;
  if (gps.date.isValid()) {
    Year = gps.date.year(); // Year (2000+) (u16)
    Month = gps.date.month(); // Month (1-12) (u8)
    Day = gps.date.day(); // Day (1-31) (u8)
  }
  else
    GPSstatus =  false;

  if (gps.time.isValid()) {
    Hour = gps.time.hour(); // Hour (0-23) (u8)
    Minute = gps.time.minute(); // Minute (0-59) (u8)
    Second = gps.time.second(); // Second (0-59) (u8)
  }
  else
    GPSstatus =  false;

  if (last_second != gps.time.second()) {
    last_second = gps.time.second();
    // set current UTC time
    setTime(Hour, Minute, Second, Day, Month, Year);
    // add the offset to get local time
    adjustTime(time_offset);
    // update time array
    Time[6] = second() / 10 + '0';
    Time[7] = second() % 10 + '0';
    Time[3]  = minute() / 10 + '0';
    Time[4] = minute() % 10 + '0';
    Time[0]  = hour()   / 10 + '0';
    Time[1]  = hour()   % 10 + '0';
    // update date array
    Date[8] = (year()  / 10) % 10 + '0';
    Date[9] =  year()  % 10 + '0';
    Date[3]  =  month() / 10 + '0';
    Date[4] =  month() % 10 + '0';
    Date[0]  =  day()   / 10 + '0';
    Date[1]  =  day()   % 10 + '0';
  }
  switch (weekday())  {
    case 1:  nameofday = "SUNDAY, ";   break;
    case 2:  nameofday = "MONDAY, ";   break;
    case 3:  nameofday = "TUESDAY, ";   break;
    case 4:  nameofday = "WEDNESDAY, ";   break;
    case 5:  nameofday = "THURSDAY, ";   break;
    case 6:  nameofday = "FRIDAY, ";   break;
    default: nameofday = "SATURDAY, ";
  }
  if (gps.speed.isValid()) {
    speed = gps.speed.mps(); // Speed in meters per second (double)
  }
  else
    GPSstatus =  false;

  if (gps.altitude.isValid()) {
    Altitude = gps.altitude.meters(); // Altitude in meters (double)
  }
  else
    GPSstatus =  false;

  delay(1000);
}

String dateString() {
  DateString = "";
  DateString += nameofday;
  DateString += " ";
  DateString += Date;
  DateString += " ";
  DateString += Time;
  return DateString;
}