一个MODEM的短信软件，支持多串口，轮寻发送，自动接收以及PDU和TEST的交互方式，特别是对串口的操作有借鉴意义！-a MODEM messaging software, support multiple serial ports, find this round, automatically receive TEST and PDU and interactive, especially for serial operation, he said.

这是一个完整的无线通讯工程，利用无线MODEM与外界交互。-This is a complete wireless communications engineering, the use of wireless MODEM interaction with the outside world.