Hi @jtsheedy -
Are you able to send at 10hz? The Autopilot may require it at that or faster in order to use…
This python script referenced here can be used to test functionality, as it demonstrates heading and position can be sent…
If you continue to have issues, please share a sample output of the messages being sent and a .BIN autopilot log from when the system was armed with the output streamig and serial2 configured to udpin 0.0.0.0 - thanks!