说明：  短信二次开发控件SMSComm，它可以极大的加速你的开发进程 1. 短信收发共有一个串口，实现一个串口和一个Modem完成短信的收发，这样可以降低开发成本 2. 定时清理任务可以避免在某些情况下由于SIM卡空间不足导致接收短信的阻塞现象 3. 如果接收到一条短信后就立马删除它，会导致SIM卡中的某些存储单元会被平凡使用，而另一些单元始终空闲，这样会使SIM卡的寿命缩短。该控件预定义40个存储单元（与实际使用的SIM短信存储空间有关），这些单元将会被平均使用，大大延长了SIM的寿命 4. 控件内部维护了一个线程，该线程同时维护1）发送消息任务；2）读取消息任务；3）定时清理任务；4）监听到达短信任务；5）删除短信任务
(SMS Control SMSComm secondary development, It can greatly accelerate your development of a process. SMS were a serial port transceiver, achieve a serial modem and a complete messages TX, This can reduce development costs 2. regular cleaning tasks can be avoided in some cases due to lack of space SIM cards to receiving messages obstruction phenomenon 3. If you receive a message to delete it after flew, SIM cards will lead to some of the storage unit will be ordinary use, and some other modules always idle, This will enable SIM card shorten the life span. Control of the 40 predefined memory modules (SIM actual use of the SMS storage space), These modules will be average, greatly extended the life expectancy of four SIM. internal controls to safeguard a thread, The thread while preserving a) )