The document proposes a system to remotely access the power windows of a car. It uses a GSM modem in the car that receives commands from a mobile phone. A second level of security coding protects the car from unauthorized access. The GSM modem is connected to a LIN slave microcontroller via serial communication registers. The LIN slave controller is connected to a LIN master controller via a LIN network. The LIN master operates the power window motor through a relay circuit when commanded by an authorized mobile phone. The system aims to solve the problem of accessing a locked car when keys are left inside.

1. SECURED ACCESSING OF POWER WINDOW
BY REMOTE
Project Guidance:
Revathi.T
TIFAC Core
PRESENTED BY:
SAI BHARATHI.G(11MEA0023)
NAGA PRADEEP.V(11MEA0039)
TIFAC CORE VIT UNIVERSITY

2. INTRODUCTION
• Today, many cars with power window locks have a radio
frequency remote keyless system, which allows a person to
press a button on a remote control key fob.
• The problem occurs when the driver comes out the car
without realizing the key inside it is very difficult to take out
the keys as the all the doors and windows will be locked
automatically. So in order to overcome this situation a
solution is proposed here.
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3. OBJECTIVE
• To design and develop a system which allows to access the
power window of car remotely.
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4. METHODOLOGY
• A command will be sent from the mobile, and it will be
received using GSM modem present in the vehicle.
• In order to protect the vehicle from malfunctioning of other
people instead of authorized person, second level of security
coding is used.
• Depending upon the command received from authorised
person, the accessing of power window can be done which
will be connected by a LIN network.
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5. BLOCK DIAGRAM
SCI
GSM
MOBILE LIN SLAVE
MODEM
LIN
MASTER
POWER WINDOW RELAY CIRCUIT
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6. Hard wares Used
DEMO9S12XDT512
The HCS 12 contains two SCI module. SCI is operated by two control
registers: SCI0CR1 (SCI1CR1) and SCI0CR2 (SCI1CR2).
GSM modem communicates to HCS 12 by using serial communication
registers.
GSM MODEM
visiontek 81GC is a highly flexible GSM modem for easy integration. It is
perfect solution for to use with GSM gateway.
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7. TIFAC CORE VIT UNIVERSITY

8. GSM MODEM
COMMAND USED:-
AT
The communication always starts with AT
command. AT refers to ATtention
AT+CMGF=“1”
In this we are having two formats, text mode
and PDU mode. By enabling the text mode can
be selected.
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9. Phase 1:
Communicating with GSM
Phase2:
Master and Slave communication
Phase3:
Operating motor with relay circuit
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10. THANK YOU
TIFAC CORE VIT UNIVERSITY