Car anti-theft alarming system based on GSM

A car anti-theft alarming system with the functions of sending SMS and dialing alarming numbers was introduced in this paper.In this system AT89C52 SCM is used as core control module to control the GSM module.Meanwhile the body infrared sensor performs to detect the alarming signals.Once the sensor receives alarming signals SCM will send AT instructions which controls GSM to send alarming signals or dialing alarming numbers as soon as possible.By this alarming system your car will be under monitoring all day from all aspects.As a result,the owner will get informed in time if something wrong happens.A great breakthrough on enlarging the monitoring range has been made by GSM technology.Also practice has proved the stability and reliability of this system.