本系统主要由单片机和GSM短信模块组成，借助最可靠、最成熟的GSM移动网络，以最直观的中文短消息或电话形式，直接把报警地点的情况反映到您的手机屏幕上-This system is mainly composed message Singlechip and GSM modules, with the most reliable, the most sophisticated of the GSM mobile network in the most intuitive of the Chines