Delphi 本身没有串口控件，这个是一款不错的串口控件。-Delphi does not have serial port control, this is a good serial port control.

解决Spcomm控件使用过程中，代码正确却不能接受信号的问题。是个小技巧-Solve Spcomm control use, but can not accept the correct code signal problems. Is a small skill