(Not sure if this is the right place so a mod might move it if necessary.)
I see a Python module to run as many terminals as you need to watch inside just one so you can send a message to your transmitter ands watch what the receiver gets . Good for debugging receiver /transmitter stuff and other things .
You need to have python 2 or 3 and I noticed my python 2 did not have the argparse module so I had to get it to make it run.
Each serial input is in its own colour and you can change them by swaping the colour list in the script
See more about it here http://jdonnal.scripts.mit.edu/home/?p=135