Hi, I have been flying fixed wing aircraft with the following config:
- Dropix v2.1 autopilot (fmuV2) running Arduplane 3.9.9
- RFD868x modules for telemetry
- MissionPlanner 1.3.68
Everything worked fine until I upgraded to AP4.0.6 and MP1.3.74 few days ago … since then I am unable to download the parameters from the plane (the Getting params window just sits there forever):
Upload of the mission etc. won’t work as well:
The details window is here:
Strangely enough, all flight data are received by the MissionPlanner as expected. Here is the MAVlink Inspector output:
I have tried:
- AP->AC->AP cycle to reset all params to default
- downgrading both the firmware and MP to the originally working versions
- upgrading and downgrading the RFD868 firmware
- enabling/disabling hardware flow control both at the autopilot and RFD868 side
- changing Airspeed, Enabling/Disabling ECC, number of channels etc…
- changing SR*_* parameters to both low and high values
- changing serial protocol to Mavlink 2 and back to Mavlink 1
…with no effect. However, if I connect to the autopilot via USB, everything works flawlessly. What is more puzzling to me, the same is true when I use my old 3DR 433Mhz telemetry kit connected to the very same port as the problematic RFD868x.
In a nutshell, I believe that the upgrade to 4.0.6 must have made some persistent changes that prevent the 868x to communicate correctly, even if I revert to the previously working config.
If anyone has an idea what might be the problem here, I would really grateful, this has been driving me crazy for several days now.
Thank you very much,
Petr.