From the time of the frist T-Ford car of the world been stolen,stoling cars has become one of the most common criminal act,which has been a serious problem.With the increasing number of cars,Car anti-stolen has become a critical problem in people's lives.According with the rapid development of electronic technology,the car anti-theft technology is developing towards a high degree of intelligence and functional diversification.The car anti-theft equipment ,according to their structure and function ,can be divided into four main categories:mechanical,electronic,chip-type and network.Among these categoties,electronic is one of the most widely used car anti-theft equipment methods.In this paper, the design of GSM car anti-theft alarm system is a network of anti-theft system,which is also the most advanced and reliable security technology on the market currently.
The designation of this paper use the Siemens's TC35 module as a core module of communication.That is the alarm signal transport through the judgement of the control unit，then throngh the TC35 module and used a short message sent to the mobile phones which the car owners has designated.This could allow the car owner to monitor their own car at any place.In addition, it can realize communication only requires the car owner prepare a SIM card which can connect to the GSM net by themselves instead of joining a private network.It has the character of low-cost and high-performance.
This article focuses on the meaning of discussing the topic , the demonstration of the design methods as well as the process of designation and debug optimization.
Key words：car anti-stolen 315M transmit and receive AT command TC35 module
