手机信息开发:单片机和GSM引擎之间采用AT指令实现互相之间的通信，因此有必要了解一下AT指令的格式和几条常用的指令。更详细的资料可以参考GSM07.05和GSM07.07规范

串口复用协议GSM07.07相关源码，在软件上实现两个串口而实际只有一个物理串口；-Serial multiplexing GSM07.07 agreement related source in the software and the actual realization of the two serial ports that there is only one physical serial port

介绍用MCS-51系列单片机控制手机收发短信息的原理、硬件电路、PDU数据格式和符合GSM07.05协议要求的短信息发送/接收程序，同时给出了一个应用实例-Introduced the use of MCS-51 Microcontroller phones send and receive short messages principle, the hardware circuit, PDU data format and meet the requirements of the short

51单片机控制tc35西门子TC35i AT指令集的详细说明文档。包括Standard V.25ter AT Commands、传真指令、GSM07.07指令集、以及西门子增强AT指令集说明。-51 SCM tc35 Siemens TC35i AT commands set the detailed documentation. Including the Standard V.25ter AT Commands, fax orders, GSM07.07 instruction set, a