OpenPlotter RPI 4 and hat

[ssth@yahoo.com]

I have been working on installing rf controls through my Rpi4 and Sean's hat recently to provide autopilot controls at the helm station instead of just in the cabin navigation station.  The RPI works fine with OpenPlotter, Pypilot, and the autopilot, but I have been unable to get the RF transmitters to communicate with the hat.  The blue LED flashes on a command from the transmitter and the backlight works on the hat, but there is no other data on the LCD screen and no transfer of data from the transmitter to the autopilot.
Any ideas of what needs to be fixed would be helpful.