西门子模块at指令集，对西门子无线模块开发有所帮助-modules at Siemens instruction set, the Siemens Wireless Module Development help

基于ARM7TDMI和SIM100模块的无线传输程序，包括拨号，接听，挂机，发短信功能。-SIM100 module and wireless transmission procedures, including dial-up, manned hook, send text messages function.