自动检测串口上是否有通信设备，然后开启发送短信功能，vc下调试通过-Automatically detects whether there is serial communications equipment on, and then open the send message function, vc debugging through

基于GSM的手机短信监控系统 实现的功能有：发短信控制3台远程终端设备(门窗、空调、冰箱等)的开关；监测终端环境的温度；监测远程终端设备的电压；两个红外防盗报警器随时监控等，煤气泄露检测，还可以增加其它环境监测功能与安全检测功能. 。-GSM-based mobile phone messaging system to achieve the functions of monitoring are as follows: send text messages to control 3 remot