Mavlink and Telem2

Hallo,

need some help. Try to connect Mavlink Protokolle to Telme1 and Telem2.
Want to connect an Arduino Nano to the telemetry information in DJI Air Unit and get Information on Groundstation.

Attached Information of the Config
Board
https://docs.px4.io/master/en/flight_controller/pixhawk4.html


If I connect Groundstation to telem1 it is working, if I connect the Arduino to telem1 it is working.
Now I try to con Telem2 for Arduino in the the Marvlink Tab, but get not data.

Also tried to connected Groundstation to telem2 is also not working.

Someone has I solution?

Thanks
Stephan

I have this question too.