利用串口读写来操作手机，进行短消息的发送与读取-Read/Send SMS using COM port to access celluar phone

　本程序是一个通过串口收发端消息的范例。仅供学习和研究之用。多数手机和所有GSM模块本身具备MODEM功能-This program is an example of a message through the serial port transceiver side. For study and research purposes. Most phones and GSM module itself with MODEM