You can confirm that the serial port works as it should by doing a loopback test as shown here:
Meanwhile with WSJT-X you should be able to transmit if you set rig to none and manually tune the radio.
You can confirm that the serial port works as it should by doing a loopback test as shown here:
Meanwhile with WSJT-X you should be able to transmit if you set rig to none and manually tune the radio.