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Every year about 700,000 vehicles get stolen in US. In fact, a car is stolen every 45 seconds.

We all love our cars and whether it is a roaring Lamborghini or a purring Prius, we are attached to it and wish that it never gets stolen.

I am very attached to my family car and take lots of precaution that I do not park my car in secluded places or double check that I always lock my car when I park it anywhere and always carry my car keys with me. However, I am still worried whether my car is safe. In order to get rid of these genuine worries, I decided to design my own low cost car tracking system.

In this instructable, I have explained the process of building one's very own Global Car Tracking System -'Athena' - for a cost of just 100$. The steps for building this device is very simple and explained in a lucid manner. The skills required for you to build this is minimum (Basic knowledge about electronics and the Arduino IDE).

I have christened this device by the name 'Athena' because Athena is the Greek Goddess of navigation. 

So what are we waiting for.....let's get started.......

    
 
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Step 1: Parts Needed:

Picture of Parts Needed:
The following is a list of parts needed to build 'Athena' :-

Supplies :
  1. Arduino Uno
  2. Arduino GSM Shield (I have used a SIM900 GSM/GPRS Shield Module)
  3. GPS Module
  4. Adapter Plug for powering the Arduino
  5. 4pcs of LM7805 IC
  6. PCB
  7. Wires
  8. Male Header Pins
  9. Female Header Pins
  10. Project Enclosure
Tools :
  1. Soldering Iron
  2. Solder
  3. Soldering Wax
  4. Drill
  5. Hacksaw



 

Step 2: The Circuit: Voltage Regulator Circuit

The Arduino and GSM shield operate at voltages between 5 volts and 12 volts. Although the car has a 12 volt battery and electrical system, the voltage can sometimes spike up and damage the Arduino if connected directly. Hence to be on the safer side, I have decided to use an LM7805 Voltage regulator to regulate the 12 volts input voltage to 5 volts. The LM7805 IC generates an output of 5 volts 0.5 amps. Since the GSM module can sometimes draw upto 2 Amperes of current, I have used 4 pcs of LM7805 IC to meet the requirement.

The Circuit :
  1. Cut the PCB using a hacksaw into a piece large enough to fit the 4pcs of LM7805 IC (Refer to Pic. 1).
  2. Arrange the LM7805 in a parallel connection on the PCB (Refer to Pic. 1) and bend the leads of the IC to connect them in parallel(Refer to Pic. 3)
  3. Solder Wires to the 12v Input of LM7805, Ground Input, 5v Output of LM7805 and Ground Output.
  4. Connect the Adapter plug to the 5v Output and Ground Output Wires. The final product should look like Pic. 5 

Step 3: Preparing the Project Enclosure: Drilling Holes

Picture of Preparing the Project Enclosure: Drilling Holes
3D 100_0780.jpg
In this step you will drill the holes to mount the Arduino and the GSM Antenna to the project enclosure.
  1. Drill four holes at the bottom of the project enclosure to secure the Arduino Uno in it.
  2. Drill a hole on the left wall of the enclosure big enough for the USB cable to connect to the Arduino. 
  3. Drill a hole on the right wall for the GSM Module Antenna.
  4. Drill two holes on the right wall for the Power Input wires.

Step 4: Wiring the GPS Module

The GPS module must be connected in a detachable manner to the Arduino Uno. If wires are soldered to the module, then the module cannot be reused for some other application or project. Hence I have used header pins to create a detachable connection between the GPS module and the Arduino. The following are the steps to create a detachable connection:-
  1. Cut four pieces of wire and solder the male header pins to one end of the wire. Wrap the soldered ends of the wire in insulation tape(Refer to Pic. 3).
  2. If female header pins are available, then solder the other ends of the wire to the female header pins. (Top tip: If female header pins are not available, then briefly heat the ends of the wire over a candle to partially melt and loosen up the insulation on the wire. Then force each of the wires into the Vcc, Gnd , Tx and Rx pins of the GPS Module. Refer to the Pic. 4)
  3. After connecting the wires to the Vcc, Gnd , Tx and Rx pins, the GPS module should look like Pic. 6  

Step 5: Final Assembly

Now you can assemble all the parts of the Global Tracking System.
  1. Place the Arduino Uno in the project enclosure and fasten it with screws or zip tie(Refer to Pic. 1).
  2. Insert the Adapter plug into the Arduino and place the Voltage Regulator Circuit into the enclosure. Insert the Input Voltage wires through the two holes drilled in the enclosure(Refer to Pic. 3).
  3. Screw the GSM antenna in place(Refer to Pic. 5). Insert SIM card into the GSM module and place the module over the the Arduino Uno( Refer to Pic. 7).
  4. Place the GPS module in the project enclosure and connect it to the GSM shield in the following manner. Connect the Vcc pin from the GPS module to 5v on the GSM Shield. Connect the Gnd pin from the GPS module to Gnd pin on the GSM Shield. Connect the RXD pin from the GPS module to Pin 5 on the GSM Shield. Connect the TXD pin from the GPS module to Pin 4 on the GSM Shield. 

Step 6: Programming the Arduino:

Picture of Programming the Arduino:
Before you can program the Arduino Uno, you must first install the Tiny GPS library for the GPS Module.
These are the steps to install the library :-
  1. Download the Tiny GPS library for the Arduino. (link)
  2. Extract the zip file to the folder: " Libraries/Documents/Arduino/libraries "
  3. Now you would see the library under   " Sketch --> Import Library "  in the Arduino IDE.
  4. You can proceed with the Arduino Uno programming.

The following is the source code for the Arduino. Copy the code below and load it on the Arduino :-

//Program written for Global Car Tracking System by Jayvis Gonsalves
#include <SoftwareSerial.h>
#include <string.h> 
#include <TinyGPS.h>
SoftwareSerial Sim900Serial(2, 3);
byte buffer[64];                             // buffer array for data recieve over serial port
int count=0;                                 // counter for buffer array
SoftwareSerial GPS(4, 5);
TinyGPS gps;
unsigned long fix_age;
long lat, lon;
float LAT, LON;
void gpsdump(TinyGPS &gps);
bool feedgps();
void getGPS();
void setup()
{
  Sim900Serial.begin(19200);     // the SIM900 baud rate
  GPS.begin(9600);                   // GPS module baud rate  
  Serial.begin(9600);                  // the Serial port of Arduino baud rate.
  delay(500);
  Sim900_Inti();
}
 
void loop()
{
  Sim900Serial.listen();
  if (Sim900Serial.available())                     // If date is comming from from GSM shield)
  {
    while(Sim900Serial.available())              // reading data into char array 
    {
      buffer[count ]=Sim900Serial.read();  // writing data into array
      if(count == 64)break;
     }
    Serial.write(buffer,count);                     // if no data transmission ends, write buffer to hardware serial port
    Cmd_Read_Act();                               //Read the 'COMMAND' sent to SIM900 through SMS
    clearBufferArray();                               // call clearBufferArray function to clear the storaged data from the array
    count = 0;                                          // set counter of while loop to zero
 
 
  }
  if (Serial.available())                       // if data is available on hardwareserial port ==> data is comming from PC or notebook
    Sim900Serial.println(Serial.read());       // write it to the GPRS shield
}
void clearBufferArray()                             // function to clear buffer array
{
  for (int i=0; i<count;i )
    { buffer[i]=NULL;}                                // clear all index of array with command NULL
}
void Sim900_Inti(void)
{
  Sim900Serial.println("AT CMGF=1");    // Set GSM shield to sms mode
  Serial.println("AT CMGF=1");
  delay(500);
  Sim900Serial.println("AT CNMI=2,2");
  Serial.println("AT CMGF=1");
  delay(500);
}
void Cmd_Read_Act(void)                       //Function reads the SMS sent to SIM900 shield.

  char buffer2[64];
  for (int i=0; i<count;i )
  { buffer2[i]=char(buffer[i]);}  
    
  if (strstr(buffer2,"INSTRUCTABLES"))    //Comparing password entered with password stored in program  
  {
      Serial.println("Password Authenticated.");
      Serial.println("Sending reply SMS. ");
      SendTextMessage();            
  }
  
}
void SendTextMessage()
{
  
  
Sim900Serial.print("AT CMGF=1\r");    //Sending the SMS in text mode
delay(100);
Sim900Serial.println("AT CMGS = \"**********\"");//The predefined phone number
delay(100);
Sim900Serial.println("Please wait while Module calculates position");//the content of the message
delay(100);
Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26
delay(100);
Sim900Serial.println();
int counter=0;
GPS.listen();


for (;;)
{
   long lat, lon;
   unsigned long fix_age, time, date, speed, course;
   unsigned long chars;
   unsigned short sentences, failed_checksum;
   long Latitude, Longitude;
    
   // retrieves /- lat/long in 100000ths of a degree
   gps.get_position(&lat, &lon, &fix_age);
   getGPS();
   Serial.print("Latitude : ");
   Serial.print(LAT/1000000,7);
   Serial.print(" :: Longitude : ");
   Serial.println(LON/1000000,7);
   if (LAT == 0 && LON == 0)
  {
    continue;    
  } 
  counter ;
  if (counter<30)
  {
    continue;    
  }
  
  Sim900Serial.print("AT CMGF=1\r");    //Sending the SMS in text mode
  delay(100);
  Sim900Serial.println("AT CMGS = \"**********\"");//The predefined phone number
  delay(100);
  Sim900Serial.print("Latitude : ");
  Sim900Serial.print(LAT/1000000,7);
  Sim900Serial.print(" :: Longitude : ");
  Sim900Serial.println(LON/1000000,7);//the content of the message
  delay(100);
  Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26
  delay(100);
  Sim900Serial.println();
  counter=0;
  break;
 }      
}

void getGPS()
{
   bool newdata = false;
   unsigned long start = millis();
   while (millis() - start < 1000)
   {
      if (feedgps ())
      {
         newdata = true;
       }
     }
     if (newdata)
   {
      gpsdump(gps);
    }
}
bool feedgps()
{
   while (GPS.available())
 {
      if (gps.encode(GPS.read()))
        return true;
      }return 0;
}
void gpsdump(TinyGPS &gps)
{
   gps.get_position(&lat, &lon);
   LAT = lat;
   LON = lon;
   {
      feedgps(); 
    }
  }









 

Step 7: Testing

Picture of Testing
3D 100_0820.jpg
Now that you have built the 'Athena', it is time to install it in your vehicle. The device can be installed anywhere in the car: the hood, cabin or trunk. Remember that the device must be hidden from view and difficult to locate by a car thief. The device must directly be connected to the 12v Car battery as it must run even when the car is switched off.

Steps to track down your vehicle using 'Athena' :-
  1. When your car is stolen and you wish to track your car, simply send a text message containing the password to your car.
  2. Athena then verifies the password you entered with the password stored in its program. If the password matches, then Athena sends an acknowledgment SMS to the predefined phone/cell number stored in it.
  3. Athena then begins to calculate its GPS position and once a GPS lock is acheived, it sends the coordinates of its location to the number stored in its program.
  4. After you receive the Coordinates in your message, copy them to the search bar in google maps to reveal the position of your stolen car.   

And there you go...congratulations!!! You have built your very own Global Car Tracking System.

If you have any difficulties building this instructable, do feel free to ask.

GREAT!!!!! NOW GO AHEAD AND CONSTRUCT ONE YOURSELF!!!!! : )
 
1-40 of 165Next »

Hi Jayvis,

I really need your input. I am having trouble reading the program I have all the parts, I put them together and I am ready to test it. i have a problem though i don't know what number i am sending my password to. I tried reading the program over and over and still can't figure it out please help. My email is happy_2_work@yahoo.com.Please send me anything you think that will help me on this project.thanks so much.

Juanita Jones

you need to put the sim card from the gsm module into a phone, text yourself, then replace it into the module. The number you text is the one that it is sent from.

ninjaz5736

i'm using new Arduino GSM Shield integrated antenna (telefonica/bluevia) to built this tracking device and encountered some problem. my tracking device is able to receive sms and get the coordinates. but it cannot reply the sms to the predefined number. the image is my current output.

and this is my coding program. Can someone help me figure out what seem to be the problem and how to solve it. Thanks

#include <SoftwareSerial.h>

#include <string.h>

#include <TinyGPS.h>

SoftwareSerial Sim900Serial(2,3);

byte buffer[128]; // buffer array for data recieve over serial port

int count=0; // counter for buffer array

SoftwareSerial GPS(4,5);

TinyGPS gps;

unsigned long fix_age;

long lat, lon;

float LAT, LON;

void gpsdump(TinyGPS &gps);

bool feedgps();

void getGPS();

void SIM900power() // software equivalent of pressing the GSM shield "power" button

{

digitalWrite(9, HIGH);

delay(1000);

Sim900_Inti();

}

void setup()

{

Sim900Serial.begin(19200); // the SIM900 baud rate

GPS.begin(9600); // GPS module baud rate

Serial.begin(19200); // the Serial port of Arduino baud rate.

delay(500);

Sim900_Inti();

}

void loop()

{

Sim900Serial.listen();

if (Sim900Serial.available()) // If date is comming from from GSM shield)

{

while(Sim900Serial.available()) // reading data into char array

{

buffer[count++]=Sim900Serial.read(); // writing data into array

if(count == 64)break;

}

Serial.write(buffer,count); // if no data transmission ends, write buffer to hardware serial port

Cmd_Read_Act(); //Read the 'COMMAND' sent to SIM900 through SMS

clearBufferArray(); // call clearBufferArray function to clear the storaged data from the array

count = 0; // set counter of while loop to zero

}

if (Serial.available()) // if data is available on hardwareserial port ==> data is comming from PC or notebook

Sim900Serial.println(Serial.read()); // write it to the GPRS shield

}

void clearBufferArray() // function to clear buffer array

{

for (int i=0; i<count;i++)

{ buffer[i]=NULL;} // clear all index of array with command NULL

}

void Sim900_Inti(void)

{

Sim900Serial.println("AT+CMGF=1"); // Set GSM shield to sms mode

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

delay(500);

Sim900Serial.println("AT+CNMI=2,2");

Serial.println("AT CMGF=1");

delay(500);

}

void Cmd_Read_Act(void) //Function reads the SMS sent to SIM900 shield.

{

char buffer2[64];

for (int i=0; i<count;i++)

{ buffer2[i]=char(buffer[i]);}

if (strstr(buffer2,"TRACK")) //Comparing password entered with password stored in program

{

Serial.println("Password Authenticated.");

Serial.println("Sending reply SMS. ");

SendTextMessage();

}

}

void SendTextMessage()

{

Sim900Serial.print("AT+CMGF=1\r"); //Sending the SMS in text mode

delay(100);

Sim900Serial.println("AT + CMGS = \"+60103843894\"");//The predefined phone number

//Sim900Serial.print("AT+CMGS=");

//Sim900Serial.println("+60174432599");

delay(100);

Sim900Serial.println("Please wait while Module calculates position");//the content of the message

delay(100);

Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26

delay(100);

Sim900Serial.println();

delay(5000);

int counter=0;

GPS.listen();

for (;;)

{

long lat, lon;

unsigned long fix_age, time, date, speed, course;

unsigned long chars;

unsigned short sentences, failed_checksum;

long Latitude, Longitude;

// retrieves /- lat/long in 100000ths of a degree

gps.get_position(&lat, &lon, &fix_age);

getGPS();

Serial.print("Latitude : ");

Serial.print(LAT/1000000,7);

Serial.print(" :: Longitude : ");

Serial.println(LON/1000000,7);

/*if (LAT == 0 && LON == 0)

{

continue;

}

counter ;

if (counter<30)

{

continue;

}

*/

Sim900Serial.print("AT+CMGF=1\r"); //Sending the SMS in text mode

delay(100);

Sim900Serial.println("AT + CMGS = \"+60103843894\"");//The predefined phone number

delay(100);

Sim900Serial.print("Latitude : ");

Sim900Serial.print(LAT/1000000,7);

Sim900Serial.print(" :: Longitude : ");

Sim900Serial.println(LON/1000000,7);//the content of the message

delay(100);

Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26

delay(5000);

Sim900Serial.println();

counter=0;

break;

}

}

void getGPS()

{

bool newdata = false;

unsigned long start = millis();

while (millis() - start < 1000)

{

if (feedgps ())

{

newdata = true;

}

}

if (newdata)

{

gpsdump(gps);

}

}

bool feedgps()

{

while (GPS.available())

{

if (gps.encode(GPS.read()))

return true;

}return 0;

}

void gpsdump(TinyGPS &gps)

{

gps.get_position(&lat, &lon);

LAT = lat;

LON = lon;

{

feedgps();

}

}

2nd result.jpg

Hi I was wondering if you ever got this to work. for some reason I am having the same exact issue as you.

i found the solution. if you want my sketch coding, just provide your email.

@ MUHAMMAD ABDUH I would love your sketch coding because I am working on building this now and I looking over this coding and I don't understand some of it. I would like to know that once I am done putting the code and phone number in and am finally ready to test the GPS, where am I sending my password to? Is there a certain code I put in my phone to actually text my car if so what is it? My email address is happy_2_work@yahoo.com. Any suggestions you have to help me would be greatly appreciated.

THANKS

can you please send me your coding "phalozeka@gmail.com"

salam, bro can you share your sketch coding with me, zaf_unknown_11@yahoo.com

Could you email your sketch to me? alvin.jin2000@gmail.com

Hello Muhammad ,

What's the solution? alpharoboticsteam@gmail.com

Best regards , Nelu

Hey Nice job......could you please share the code with me....my mailid is sumitsw123@gmail.com

Best Regards

hey can u please send me the correct code as its not working for me as well.

My id is: madhavaggarwal55@gmail.com

good day, you could pass me the correct code too, because I'm having the same problem with the coordinates, I get only 00000000, thanks. my email is henriqro@gmail.com

Hey guy i have much Problems pls can u send me your sketch too.

settari.d@sbg.at

Dark_eye Seaha3 months ago

didi you het the sketch to send it to me, i can get his working to

Seaha Dark_eye3 months ago

Hey guy thanks alot here is my sketch.

My Problem is that i get an SMS but the Coordinates are ever 0.00000 0.00000

i dont receive the wright coordinates.

I use the Adafruit gps Breakoutboard

maybe i have a problem with the tiny gps library

#include <SoftwareSerial.h>

#include <string.h>

#include <TinyGPS.h>

SoftwareSerial Sim900Serial(2,3);

byte buffer[128]; // buffer array for data recieve over serial port

int count=0; // counter for buffer array

SoftwareSerial GPS(4,5);

TinyGPS gps;

unsigned long fix_age;

long lat, lon;

float LAT, LON;

void gpsdump(TinyGPS &gps);

bool feedgps();

void getGPS();

void SIM900power() // software equivalent of pressing the GSM shield "power" button

{

digitalWrite(9, HIGH);

delay(1000);

Sim900_Inti();

}

void setup()

{

Sim900Serial.begin(19200); // the SIM900 baud rate

GPS.begin(9600); // GPS module baud rate

Serial.begin(19200); // the Serial port of Arduino baud rate.

delay(500);

Sim900_Inti();

}

void loop()

{

Sim900Serial.listen();

if (Sim900Serial.available()) // If date is comming from from GSM shield)

{

while(Sim900Serial.available()) // reading data into char array

{

buffer[count++]=Sim900Serial.read(); // writing data into array

if(count == 64)break;

}

Serial.write(buffer,count); // if no data transmission ends, write buffer to hardware serial port

Cmd_Read_Act(); //Read the 'COMMAND' sent to SIM900 through SMS

clearBufferArray(); // call clearBufferArray function to clear the storaged data from the array

count = 0; // set counter of while loop to zero

}

if (Serial.available()) // if data is available on hardwareserial port ==> data is comming from PC or notebook

Sim900Serial.println(Serial.read()); // write it to the GPRS shield

}

void clearBufferArray() // function to clear buffer array

{

for (int i=0; i<count;i++)

{ buffer[i]=NULL;} // clear all index of array with command NULL

}

void Sim900_Inti(void)

{

Sim900Serial.println("AT+CMGF=1"); // Set GSM shield to sms mode

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

delay(500);

Sim900Serial.println("AT+CNMI=2,2");

Serial.println("AT CMGF=1");

delay(500);

}

void Cmd_Read_Act(void) //Function reads the SMS sent to SIM900 shield.

{

char buffer2[64];

for (int i=0; i<count;i++)

{ buffer2[i]=char(buffer[i]);}

if (strstr(buffer2,"Seda")) //Comparing password entered with password stored in program

{

Serial.println("Password Authenticated.");

Serial.println("Sending reply SMS. ");

SendTextMessage();

}

}

void SendTextMessage()

{

Sim900Serial.print("AT+CMGF=1\r"); //Sending the SMS in text mode

delay(100);

Sim900Serial.println("AT + CMGS = \"06601524106\"");//The predefined phone number

//Sim900Serial.print("AT+CMGS=");

//Sim900Serial.println("+60174432599");

delay(100);

Sim900Serial.println("Bitte warten Sie bis das Modul die Position ihres Fahrzeugs berechnet hat");//the content of the message

delay(100);

Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26

delay(100);

Sim900Serial.println();

delay(5000);

int counter=0;

GPS.listen();

for (;;)

{

long lat, lon;

unsigned long fix_age, time, date, speed, course;

unsigned long chars;

unsigned short sentences, failed_checksum;

long Latitude, Longitude;

// retrieves /- lat/long in 100000ths of a degree

gps.get_position(&lat, &lon, &fix_age);

getGPS();

Serial.print("Breitengrad : ");

Serial.print(LAT/1000000,7);

Serial.print(" :: Längengrad : ");

Serial.println(LON/1000000,7);

/*if (LAT == 0 && LON == 0)

{

continue;

}

counter ;

if (counter<30)

{

continue;

}

*/

Sim900Serial.print("AT+CMGF=1\r"); //Sending the SMS in text mode

delay(100);

Sim900Serial.println("AT + CMGS = \"06601524106\"");//The predefined phone number

delay(100);

Sim900Serial.print("Breitengrad : ");

Sim900Serial.print(LAT/1000000,7);

Sim900Serial.print(" :: Längengrad : ");

Sim900Serial.println(LON/1000000,7);//the content of the message

delay(100);

Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26

delay(5000);

Sim900Serial.println();

counter=0;

break;

}

}

void getGPS()

{

bool newdata = false;

unsigned long start = millis();

while (millis() - start < 1000)

{

if (feedgps ())

{

newdata = true;

}

}

if (newdata)

{

gpsdump(gps);

}

}

bool feedgps()

{

while (GPS.available())

{

if (gps.encode(GPS.read()))

return true;

}return 0;

}

void gpsdump(TinyGPS &gps)

{

gps.get_position(&lat, &lon);

LAT = lat;

LON = lon;

{

feedgps();

}

}

hi, can you send me your solutions to this problem, i am having the same problem, thank ou very much. my email is: ivancalusic@gmail.com

If you don't mind, could you also send me the sketch? dlutz058@gmail.com. Thanks!

hgaston8893@gmail.com thank you so much and btw what power supply did you end up using?

Hey ! I would really appreciate if you could email me your solution aswell , thank you very much ! My email is : iraklis.stratigis@gmail.com

Hi, Could you email your sketch coding.. Here's my email: jonellbalanay@gmail.com Thanks btw :)

Hi, could I also have the code?

Email is jeremyishi@gmail.com

thanks

MatthewM21 month ago

Also, is there a way to create a log with this that stores on the sd card so I can see my routes, distance, speed, heading etc.. The links below show logs on sd and phone tracking when stolen...

http://www.cooking-hacks.com/projects/arduino-realtime-gps-gprs-vehicle-tracking

http://arduinodev.com/mtk3329-10hz-gps-module-with-arduino/

MatthewM21 month ago

Could you email me the coding please, m.mensch07@gmail.com. I already have all the parts. Thanks

JeremyI1 month ago

Hello can you please provide the sketch coding? I want to make and I ale=ready have all the parts. Email is jeremyishi@gmail.com. Thanks

Tenumex1 month ago

Hello, where can I buy the GPS and GSM ??
Thanks

DanB21 month ago

This is brilliant, well done you. Is it possible to convert the SMS message to Google maps format, so you simply click the link sent in the message to open Google maps automatically, this would be awesome.

Dans

LunaEros2 months ago

This is a great idea for those of us with not much money and the less popular cars.

But for people that have the more desirable popular cars, if there care is stolen by a professional car ring, it might not help because with those thieves it is not long before your car will be in a shipping container destined for a south american country like Peru and although it is a great project there is no gps tracker that can transmit or receive through the steel walls of a steel shipping container.

Luckily, I have a less desirable older Lincoln and this great project is going on my list of projects to make.

Thanks!

A-R-T2 months ago

Hey all ,

I am very disappointed. Nobody could help me. Someone asked me $ 15, I am not able to pay. I liked the project and wanted to test it. Maybe someone worked. To me it did not work. I used: Arduino Duemilanove (Mega) , Arduino shield GSM and GPS receiver 600L Cirocomm. All is ok because work well in other applications. The main problem is that not receive SMS with a password. In other tests can send and receive sms. The GPS receiver works very well in other applications. I think I'll give up this application. All the best to everyone.

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A-R-T2 months ago

Hello mr ,

Please help me because the sketch no working. Please send mail at yo9bxe@gmail.com

Best regards , Nelu

A-R-T2 months ago

Hello dr friend Jayvis ,

I have a big problems. My sketch (your original setch) bloking at comand line...

AT CMGF=1
AT CMGF=1

I send password to project , my cell phone answered project received password.

What is the problem? Thanks sir ! Nelu -- alpharoboticsteam@gmail.com

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brenryan5 months ago

Really nice work. I am in the process of building one of these for my Uncle (landscaping business, Jeep was stolen before = loss of income) Commercial examples are $2/300 + and some require subscription. All this for around €50 and a prepay SIM with some credit, too good!! Thank you for bringing this to my attention.

I've been trying to make a few slight modifications to your code, one is. Seen as most phones these days are smartphones, I want to include a google maps link so you can click direct from the text to your vehicles location.

The google maps URL system is pretty straightforward, just

https://maps.google.com/maps?q=46.352524+N+7.22842...

So I was hoping including this to the text message would generate a URL to point to the vehicles location. My code is like this;

[code]

Sim900Serial.println("AT CMGS = \"**********\"");//The predefined phone number

delay(100);

Sim900Serial.print("LAT: ");

Sim900Serial.println(LAT/1000000,7" N");

Sim900Serial.print("LON : ");

Sim900Serial.println(LON/1000000,7" W");//the content of the message

Sim900Serial.println("");

Sim900Serial.println"Google maps URL: https://maps.google.com/q="LAT/1000000,7"+N+"LON/1000000,7"+W");

delay(100);

Sim900Serial.println((char)26);//the ASCII code of the ctrl z is 26

[/code]

I was wondering if anybody could forsee any problems, I mean the google URL system is just http:/maps.google.com/q=LAT+N+LON+W, don't think too much could go wrong there, but you never know.

Also I would REALLY appreciate some help if somebody could tell me how to add the speed and heading into the text.

AND FINALLY, I would like to have 2 separate passwords/triggers, like sending "locate" would behave as the example in the 'ible and text the vehicles LAT, LONG, SPEED, HEADING and the URL once.

But texting "STOLEN" or "CONTINUOUS" would send the info every 5 mins (or other variable), until "STOP" is received, which would put the system back into standby state.

I know I have asked a lot of questions and it's a big ask, but these things come naturally to some! I would be REALLY grateful if someone could help me out, but I think some of these suggestions could be of use to others also and help make this amazing instructable even better!!

Dark_eye brenryan3 months ago

hi, did you manage to include google maps location to the message?

brenryan Dark_eye3 months ago
Hi, haven't got around to building it yet....

But from the tests I've done, if you output the lat&long in that format

(https://maps.google.com/q="LAT/1000000,7"+N+"LON/1000000,7"+W)

it will create a valid URL with a nice little arrow right on your location.

I changed the URL generation segment to;

[CODE]

SIM900.print("AT+CMGF=1\r"); // AT command to send SMS message
delay(100);
SIM900.println("AT + CMGS = \"+12345678\"") //The predefined phone number
delay(100);
Sim900Serial.println("SAT fix received;"); // The content of the message.
Sim900Serial.print("LAT: ");
Sim900Serial.print(LAT/1000000,7);
Sim900Serial.println("° N");
Sim900Serial.print("LON : ");
Sim900Serial.print(LON/1000000,7);
Sim900Serial.println("° W");
Sim900Serial.println("");
Sim900Serial.println("Google Maps URL:");
Sim900Serial.print("https://maps.google.com/q=");
Sim900Serial.print(LAT/1000000,7);
Sim900Serial.print("+N+");
Sim900Serial.print(LON/1000000,7);
Sim900Serial.println("+W");
delay(100);
Sim900Serial.println((char)26); //the ASCII code of the ctrl z is 26

[CODE]

Seems to work better.

Let me know how you get on or if you have any suggestions/tips, as I said it's been bumped down my list a bit, but will be building it at some point...

Good Luck!
Seaha brenryan3 months ago

hey guy can u send me your full sketch pls

brenryan Seaha3 months ago

Send you a PM so we're not spamming the page, good luck!

Jayvis Vineet Gonsalves (author)  brenryan3 months ago

The problem is that every time I upload the code to this webpage a few + operators are automatically removed out from the code, hence you'll might be experiencing an error when trying to use it in your project.

My computer in which I have saved the program is currently down, but I could pm you'll the code once my PC is up and running.

Thanks man that would be great if you can remember, thanks!

Dark_eye brenryan3 months ago

okay, nice. is the original code working for you, mine can get the reply sms?

brenryan Dark_eye3 months ago

Nope, can't get nothing working, not sure if there's a problem with my shield.

Can't get it to connect to the network without hitting the power button : /

I can't even get it to send SMS in the SMS test sketch.

Struggling with AT commands.

Did you just use the commands in the Instructable?

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