Using Telem 3/4 for MAVlink

[cls]

Hello,

on my pixhawk 3 pro running ardupilot flight stack i’m struggling to use telemetry port 3/4. I’ve set serial4/5 to baud to 57600 and protocol to mavlink, but no data is sent through the telemetry radio. The radios work without any issue if it is connected to Telemetry port 2 which has the same configuration.

Has anyone seen this/have a solution on how this can be done?

[Yes21]

I’ve never been able to use the telem 3/4 on my pixhawk 3 pro with ardupilot.
I’ve already reported it on this forum, but nobody from Drotek did answer or give me a solution …
Hope they will read your post.