Summary of GSM Based Intruder Alerting System
This article outlines a DIY intruder alerting system that sends SMS notifications when motion is detected, ideal for homes without 24/7 monitoring. The project uses a PIR sensor to detect movement and a GSM module to transmit alerts via text message, controlled by an ATMega16 board with LCD feedback.
Parts used in the Intruder Alerting System:
- PIR Sensor
- ATMega16 Development board
- LCD board
- SIM 300/900 GSM Module
- 12V/2A Power Supply
- SIM card with balance
- PC or Laptop (Optional)
Did you know that most of the thefts at home happen when it is empty? But not everyone is rich enough to hire a security for their house and at the same time they themselves cannot be at home 24×7. Now what if there is a system which alerts you about an intruder through a text message? The following tutorial discusses how to make you own intruder alerting system.
Components Required
1. PIR Sensor
2. ATMega16 Development board
3. LCD board
4. SIM 300/900 GSM Module
5. 12V/2A Power Supply
6. SIM card with balance (or at least message offer maybe)
7. A PC or a Laptop (Optional. Needed in case of debugging)
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Initial Setup and Testing of GSM modem
If you are already familiar with a GSM Modem then you may skip this step. This part of the tutorial is for the beginners.
Once you have connected the modem and PC, you can open your default serial communication software on your PC and start sending AT commands to the modem and observing its replies.
As you can see from the above screen shot, when I sent “AT”, the modem sends back “OK”. Similarly after every correct command the modem would reply with necessary parameters and an “OK”. If you enter any wrong or inappropriate command then the modem says “ERROR”
For more detail: GSM Based Intruder Alerting System
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Why build this specific intruder alerting system?
Most home thefts occur when the house is empty, and not everyone can afford security guards or be home 24x7. -
How does the system alert the user about an intruder?
The system alerts the user by sending a text message notification. -
What components are required for the initial setup?
You need a PIR sensor, ATMega16 board, LCD board, GSM module, power supply, SIM card, and optionally a PC. -
How do you test the GSM modem during setup?
Connect the modem to a PC, open serial communication software, and send AT commands like AT to observe replies. -
What reply does the modem give for a correct command?
The modem replies with necessary parameters and an OK message after every correct command. -
What happens if an incorrect command is entered?
If you enter any wrong or inappropriate command, the modem says ERROR. -
Is a PC necessary to operate the final system?
A PC or laptop is optional and only needed in case of debugging.
