This document describes an AT89S52-based home security system that uses an IR sensor and GSM module. It detects intrusions and sends SMS messages to notify users. The system uses an AT89S52 microcontroller for processing, a GSM module for communication, an IR sensor for detection, and an LCD for display. When the IR sensor detects an obstacle, it sends a command to the microcontroller, which then sends an SMS alert via the GSM module. The system offers advantages like easy installation, worldwide access, and low cost, with potential disadvantages related to range and safety.

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JITENDRA KUMAR
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dhaka.jiten@gmail.com

2. CONTENTS
 Introduction
 Software & Hardware Requirements
 Working
 Applications
 Advantage & Disadvantage
 Conclusion
 References
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3. INTRODUCTION
 Safety is the most important requirement of home for
people.
 AT89S52 based home security system, consisting an IR
sensor and GSM Module.
 A System that detect intrusion into a building or area ,It
will send a message on your phone.
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4. SOFTWARE REQUIREMENTS
 KEIL SOFTWARE
 AT COMMANDS
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5. HARDWARE REQUIREMENTS
 AT89S52 MC
 GSM MODULE.
 LCD
 IR SENSOR
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6. Simple Architecture of GSM home security system
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7. AT89S52 MC
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8K bytes of Flash Memory
256 bytes of RAM
32 I/O lines
Two 16-bit timer/counters
A full duplex serial port
On-chip oscillator
4 to 5.5V Operating Range

8. GSM MODULE
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9. About GSM Module
 Global System for Mobile Communication
Works on frequencies 850 MHz, 900 MHz, 1800 MHz and
1900 MHz
 It is suitable for SMS as well as DATA transfer application in
M2M interface.
 Input Voltage : 5V to 12V D
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10. LCD
 Liquid Crystal Display
 LCD is a thin, flat electronic
visual display
 LCDs are more energy
efficient
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11. IR SENSOR
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 0.75μm to 1000 μm is the
infrared region
 IR waves are invisible to
human eyes.

12. WORKING
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• Detecting Obstacle
with IR Sensor
• It sends command
to mc

13. Working of GSM Module
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• The GSM modem acts like a cellular phone & transmits
text and voice data.
• It communicates with the GSM network via the SIM
card.
command Command SMS Are chor aa gye h

14. APPLICATIONS
 Industrial security system
 Bank security system
 Home security system
 Locker security system
 Power Failure Reporting
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15. ADVANTAGES
 Easy installation
 Worldwide roaming
 Low cost
 Portability
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16. DISADVANTAGES
 Range
 Safety Issues
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17. SETUP OF ALL COMPONENTS
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18. CONCLUSION
• Low cost
• Secure
• Ubiquitously accessible
• Auto-configurable
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19. REFERENCES
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Mazidi, “The 8051 mc and Embedded Systems.
http://www.gsm-modem.de/gsm-module.html
http://www.gsm-modem.de/gsm-module.com
http://www.atmel.com/devices/at89s52.aspx

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