电子通信资料，SIM300C为一款常用的GPRS通信芯片，通信格式为AT指令，可以方便的使用C语言实现，应用单片机，ARM等实现数据无线传输-Electronic communications data, SIM300C commonly used as a GPRS communication chips, communications format for the AT command, you can use C language to facilitate the realization

官方版本禁止了拷贝内容和登记书签权限。 这个版本是可以拷贝内容，登记书签的，非常有利于开发查询做点笔记什么的-The official version is banned copying content and bookmark rights. This version OPENED all rights! You can copy the contents, and mark your bookmark,even edit any content ^_^ It is very co