Nowadays, have a processor and special hardware

automobile thefts and the  vehicle production
are increasing in yearly world. Thefting the vehicle is a common problem.

The owners of the
vehicle have take care of  thefting  the vehicle. The motivation of this paper is
to avoid the thefting of vehicle and deduction of vehicles. When the vehicles
are theft the GSM will send messages.The owner will receive the message of  their own vehicle.

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The owner is now
responsible for sending the message back in effect off   thefting the vehicle.

For this reason
when any person is stealing the vehicle the modem in the GSM will send a
message through the microcontroller which will interrupt the vehicle.

On seeing the
message the microcontroller will stop the vehicle.







Keywords: GSM modem, voltage regulation, micro controller.


everyone in this  world prefers to make
the things easy perfect to handle, this project sets an example to some extent.
In this paper we deal with the security of the vehicle. Whenever the GSM modem
receives the message from the particular mobile then the car engine gets
stopped. The message received from the mobile number send to the vehicles
owners mobile number.. Applications such as the air-conditioner, VCD player,
DVD player, printer, fax machine, mobile phone etc. are examples of embedded
systems. Each of these appliances will have a processor and special hardware to
meet the specific requirement of the application along with the embedded
software that is executed by the processor for meeting that specific
requirement. The embedded software is also called “firm ware”. The
desktop/laptop computer is a general purpose computer.

2.      Proposed Method

are  using  the 
manufacturer  security  alarm only. The thief had an experience
regarding this security alarm, which means their  work 
is getting  easier  to steal 
the car  because  they had 
well  known  about the alarm circuit. They know when  the time to cut off  the alarm and had well known about  the system. So, it is important to
double  protect the  security of the vehicle. Antitheft  security 
system  utilizes  an embedded system design  with 
Dual  Tone Multi  Frequency 
(DTMF)   and  a  GSM  to 
monitor  and  safeguard a vehicle. It secures the vehicle
against theft. Upon activation, it automatically demobilizes the vehicle by
disconnecting  the  ignition key supply . This  makes  impossible
for anybody  for starting  the vehicle in a moving time. In an   attempt of  
theft   through the vehicle  doors 
or  boot, the  system 
sends  text message to the  vehicle owner and at the same time starts up
an alarm. This design popped   out  due 
to   the  increasing 
rate  at  which 
packed   vehicles  are 
stolen especially in our country, but with this design this packed
vehicle is being monitor red irrespective of where it is packed,  provided 
there is GSM  network  coverage. Now GSM will not send message to
the vehicle and we only we can hear  the
alarm from the security . Then it is guaranteed that  the vehicle will  send 
text  message to his phone, and at
the same time, have people around alerted of what is happening.        

automobile thefts are increasing and also the production of vehicle.

The theft detection system of a vehicle  using GSM is as shown in the Fig.1 and 2.
















Figure.2   Block Diagram for Vehicle Theft Control System


systems    using    a digital technology will become
the universal method of  tele-communications.
Short message service is a technique of
delivery of small messages over the mobile networks. It is a store and forward
way of transmitting messages to and from mobiles. The message (text only) from
the sending mobile is stored in a central short message center (SMS) which then
forwards it to the destination mobile. This means that in the case that the
recipient is not available, the short message is stored and can be sent later.Since
signaling message system  used signaling  to desired channel as opposed to dedicated
channels, these messages can be sent/received simultaneously with the voice/data/fax  through GSM network. SMS supports national
and international roaming. This means that you can send short messages to any
other GSM mobile user around the world. With the PCS networks based on all the
three technologies, GSM, CDMA and TDMA supporting SMS, SMS is more or less a
universal mobile data service.

2.1 Working of
vehicle theft DETECTION BY GSM

The theft detection of the vehicle using GSM involve
 Vibration Sensor,Ignition Lock,Microcntroller,
LCD display,GSM Modem & Buzzer.

The  embedded
system  installed  in the engine of the vehicle along with the
GSM modem. By entering  a correct  password the instrument allows to activate the
12v relay and then ignition of the engine will  start. Hence starts the vehicle. If anyone
tries to  access  the  vehicles
password  or  theft  the  vehicle , then 
the MCU  will block  the  entry  of  further  password. Then  the buzzer will turned on to create a noise  to  panic  the  culprit,  followed  by sending a message “Alert: Car Is Under
Threat”   through  GSM   modem  to  the  owner’s  mobile  for  further  action  for prevention  of his vehicle. According to the prototype
model after entering correct password  the  Fan
 will move and at  the same time, according to the instruction it
will  run  forward for 10 sec and backward for10 sec like
an automobile. Password can be c hanged by the following proper procedure.  First 
enter  # , then  enter the old  password ,  then  new  password.  Now  test,  whether  the  new
 is working or not.  As per  algorithm given  below the new password will retain even after  power  failure.
So  it  will work  as usual. The source code  is  written  in the embedded C language. To develop the
source code the flow chart of the project is shown in the figure below 3.

Figure-3: Flow chart for vehicle theft
control system by using GSM


 This  GSM  based  vehicle  theft control  system retrieves vehicle status is  whether 
it  is  in theft 
mode.  This  data  is
 fed  to  the  microcontroller, which  is interfaced  to  a  GSM modem. The  microcontroller generates  the 
vibrations and sends  an SMS to
the concerned authority over GSM modem  on
 periodical interv alls which is set by  the  user.
An  LCD display is connected to the
microcontroller for  crossing  the data received  before  being
sent over GSM. This project  will be very
 useful  to  people  to
keep  track of their vehicles. Further,
this project can be developed  by  making  an  arrangement
to stop the  ignition  of the vehicle by the owner  remotely by sending an SMS in theft

 The  kit
consists  of  an  ARM
Controller, Relay circuit, GSM Module and LCD 
Display  are  interfaced 
on  a single  board 
and  embedded  on single board which  is 
embedded  to  a 
vehicle  as a  control unit. The relay is connected to the
Vehicle  Engine Unit of  the Automobile When “OFF” message sent by the
owner of the  vehicle to the  mobile embedded  in the control unit, the controller displays
the  message  in  the
LCD  as shown in the Fig.4.and  invokes 
the  relay that is connected  to  engine of the vehicle   stop the
flow of  fuel  by making the engine to be locked.

Engine OFF Message


Similarly  when “ON”  the owner of the vehicle will send a message to  the 
mobile embedded  in  the 
control unit, the controller displays  
the message in the LCD is shown in the Fig.5 and  allows the fuel  flow 
by unlocking the vehicle engine.

Fig.5 Engine ON Message


In this paper we
have studied and implemented a complete working model using a Microcontroller.
Using this project, one can control his vehicle’s car engine by means of an
SMS. The main purpose of this paper  is
to prevent vehicle theft. This functionality is achieved by detecting vehicle
status in theft mode and by sending an sms which is generated automatically.
This sms is then sent to the owner of the vehicle .The owner can then sent back
the sms in order to disable the ignition of the vehicle.

Thus in this way
crimes can be reduced to a great extent as vehicles today are being stolen in
large number. Hence, vehicles today require high security which can be achieved
with the help of this application.


5  Future scope

enhancement can be done to this paper  by
 using  a  GPS
system that  helps  to  find
out the exact position of the vehicle with the help of its latitude and  longitude  which then can  be sent  to the owner  of the vehicle via SMS. This data  can  be  then  entered  by  the  owner  on  Google
map  to  find  out  the
exact location of  the vehicle. There are  many  Applications of GPS based Vehicle theft
detection  system  using  GSM  technology,  few 
of  them  are 
listed  below:GPS  Car theft  detection  can  be  used  in
 transportation vehicles of  Companies, schools, colleges and industries. This
 work can be used  in our  cars
and even in bikes.


1 B.G. Nagaraja, Ravi Rayappa, M.
Mahesh, Chandrasekhar M. Patil, Dr. T.C.                Manjunath, “Design & Development of a GSM Based
Vehicle Theft Control System ”  978-0-76953516-6/08©2008
IEEE, DOI 10.1109 /ICACC.2009.154, pp.148-152.

2 M. A. Mazidi, “The 8051 Microcontroller & Embedded    Systems”,  Pearson      Education Asia, India, 2nd edition, 2008.

Kenneth J. Ayala, “The 8051
micro-controller Architecture, programming &               applications”, Penram
International, India, 1996.

4 Raj Kamal, “Embedded System-
Architecture, Programming and Design”, Tata McGraw Hill Publisher, 2nd edition,

Myke PREDCO, “PROGRAMMING and customizing 8051 microcontroller”,  Tata McGraw Hill Publisher.

6 Toshiba’s 1993 “NAND Flash
Applications Design Guide”.

Mill man & Garble, “Combinatorial
Digital Circuits” and “Sequential
Digital Circuits” of, Microelectronics, 2nd edition.

National motor vehicle theft reduction conference 2000, Conference Papers  (Australia).

Stolen and Wrecked Vehicles Monitoring Program, CCMTA June 1994 (Canada).

 10 CCMTA Best Practice Models for Combating
Auto Theft, Version 6.1, Oct.     2006,  Anti Auto Theft Project Group.