Embedded home surveillance system with pyroelectric infrared sensor using GSM

Surveillance is one of the most important security system in today's life as it protects home from theft, burglaries and murders, as become routine in big cities. This system is very useful as it is used in many places like offices, industrial, storehouse or bank locker room, ATM etc. This embedded based home security system designed by use of smart sensors like pyroelectric infrared sensor (PIR), ultrasonic sensor to detect an intruder in home. The ultrasonic sensor is used to detect movement of objects and PIR function is to detect changes in temperature of human in infrared radiation. These sensors are built around microcontroller. When the system detects is there any unauthorized person or intruder is present, System triggers a buzzer and sends SMS. After this MCU (microcontroller unit) sends sensor signal to embedded system, to capture an image by web camera.