The er9x transmitter now will display MavLink data on the LCD.
Gerard Valade a DIYdrones member wrote the software and myself who was the principal debugger.
Works at 19200 and 38400 baud. Still have a problem with 57600 baud. Some kind of timing issue yet.
Here is a pic of the arduplane 2.30 MavLink display on the er9x.
There is an Xbee inside the er9x to receive the MaveLink data from the APN2.0 purple board.
We will post the er9x firmware soon.