实现串口调试功能，有发送，接收，清空-Implement serial debugging function, send, receive, clear, etc.

C++ 实现的串口监视小助手，提供SDK二次开发接口DEMO, DLL文件位置：SDK二次开发接口\bin\PMonitorComm.d-C++ Realize the serial port monitoring assistant to provide SDK secondary development interface DEMO, DLL file location: SDK secondary development inte