介绍常用的AT指令，包括gpsr初始化，发短信等-Commonly used in the AT commands, including the gpsr initialization, send text messages, etc.

AT指令，用于GSM通信模块，可以发短信，打电话，接电话，上网等，我们的手机差不多也是用这个。-AT commands for GSM communication module, you can send text messages, phone calls, phone, Internet, etc., we also used the phone about this.

GPRS开发、AT指令控制GPRS模块打电话、发短信、上网-GPRS development, AT commands to control GPRS module calls, send text messages, Internet