串口发送软件,自己写的.已经测试过,可以正常通信,Serial port to send the software that he wrote. Has been tested to the normal communication

是一简易的QQ系统，c#结合SQL数据库，QQ用户通信通过设置定时器-QQ is a simple system, c# combined with SQL database, QQ users to communicate by setting the timer