Downgrading PX4 firmware procedures

#1

I found that after flashing to the suggested latest firmware (Feb 27, 2019) from PX4 stack, my RC is undetectable by QGC. I tried to reflash and change to MP no change.
Can someone help me how to downgrade back the older firmware bacause the file I downloaded from github is large and I don’t know which .px4 file to run. And is downgrading fw would be a solution to my problem?
Thanks, any help is appreciated.

#2

Good day,
what kind of fc you need downgrade?

#3

The fact that QGC is not detecting any RC Channels in reality has nothing to do with QGC. This is fully a vehicle side problem. RC channel information is sent to QGC over telemetry from the vehicle. If you are having problems settings up RC then I would ask the question on Firmware forums/channels.

#4

Thanks for the suggestion.
The reason that I asked using this category was that the fact that the problem, rc detection fails occured after a fw upgrade. Before was ok.
My Taranis was also tested using a servo, it was bound and worked well.
Any solution to this? Tx

#5

I have not attempted to downgrade a qgc fw before. I came from MP environment. The procedure to upgrade/downgrade fw is different to what I know. I tried ver 1.8.0 but I coudnt get the right file fom the folder.
Help is appreciated.

#6
  • Download and save this file to a folder of your choice. This is v1.8.0 stable.
  • Go to the saved file and change the extension to px4.
  • Open QGC and click on the Gear Icon on the top right corner the click the Firmware tab
  • Plug the USB to the FC.
  • Put a check mark on Advance settings
  • Click the pull down menu and choose Custom Firmware file.
  • Go to where you saved the below and and double-click it.
  • It should reboot itself when the loading is done.
  • Click the Summery tab to confirm the firmware version.

If you want v1.8.1 stable px4fmu-v2_default.px4, you can get it here.

Good luck.

px4fmu-v2_default.stl (861.1 KB)

#7

Thanks for the help. I managed to have it unstalled and solved the RC detection issue.