Serial Watcher
Serial Watcher is a small piece of program from PCRemote Control that can watch the data
flow through any of your serial ports live and save the flowing data.
It’s main use is during the testing of serial data receiver devices.
Download
https://www.info.kmtronic.com/software/SerialWatcher/SerialWatcher.zip
Change USB Virtual COM port number
https://www.info.kmtronic.com/change-usb-relay-comport-number.html