For A device with two serial ports A, B, equipment can be through A cable to connect computers, can be installed on the computer side, in A send data regularly, and make the response data processing (greater than, less than, equal to, etc.), and then according to the result of processing data, specified in the send port B

If there is no such equipment, please recommend a single-chip microcomputer, and program control, thank you!

CodePudding user response:

You can be in taobao baud rate converter, are generally two serial ports, and then according to your logic, or write their own software