LINUX下纯C写的基于于串口发送AT命令到GSM手机模块进行短信的发送和接收短信的源程序，对短信收发研究者很有帮助-Write pure C under LINUX based on the serial port to send AT commands to the GSM mobile phone module to send and receive SMS text messages of the source code, useful for researchers to send a

串口通过AT指令控制GSM模块发送短信,打电话以及获得信号强度小区ID等等（主程序部分）-Serial port through AT commands to control the GSM module to send SMS, phone and Get signal strength area ID and so on