此为串口通信底层代码，实现串口基本通信，可以通过GSM模块和GPRS网络实现对手机短信的读取和发送（需要手机SMS卡和一定的硬件条件），此程序为其他大型系统程序的基础，比如：我现在正在做的 SMS宾馆客房预定系统（还没完成）-This is the underlying code serial communication, the realization of the basic serial communications, through GSM and GPRS network module for mobile phones to read and send text messages (SMS phone cards and the need for certain hardware conditions), this procedure to other procedures for large-scale system the basis of, for example: I now do SMS hotel room reservation system (not completed) ...