3DR radio telemetry

Hi all,

I'm trying too add Telemetry to my BBBMINI. 

Radios are both connected. 

From Planner, I can see both, Local and Remote (FW ver. SIK 1.9 on HM-TRP) but then, no communication with Arducopter. (Of course i added -C /dev/ttyO4).

Any clue? Should i

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