SIM300的封装，对于要用GSM搞硬件开发的人很-SIM300 package, for use GSM person engaged in the hardware development is

GPRS-GPS车载机控制源码，使用SIM300模块，有短消息发送、接收，TCP、UDP连接控制源代码。-GPRS-GPS Vehicle Control source, use SIM300 module, there is a short message to send, receive, TCP, UDP connections to control the source code.