Altitude holder problems

I tried to move my flight mode to Altitude holder when I was flying but when I around 2 meters from the ground the drone tries to land.
When I give some more power to adjust the altitude, the drone jumps like there is a bad reading of the sonar but I checked the logs and it seems to be good.

Do I have too much noise on the accelerometer ? Do I need to tune the altitude PID ?

Flying in stable mode is good

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –


  • Hi Chris
    Installed exactly following the Sonar instructions, including shielded cable etc. Sonar is mounted on a large Y6 on a carbon arm away from prop wash. Also isolated against accustical noise from the motors with some side-mounted foam (as on Marco Robustini's Octo as seen in the 3.0.1 announcing video, leaving of course downwards view free, just in case you would ask :-).

    Baro is factory made covered in the APM 2.5 case and in addition is below a top plane on which a GPS antenna with a quite large cooper ground plane is mounted which gives, as a side effect, also full shade to the baro (as recommended by Microcopter Germany).
    Log's show no strange readings.
    This is why I do not know where to search any more. 

  • Too many unknowns about your setup. Is your barometer correctly covered so that its shielded form light and wind/prop wash? You say you have a sonar. Is it setup correctly?

    Go through all these:

  • I have exactly the same and could not yet find a solution.

  • Any idea? nobody?

This reply was deleted.


Chris Anderson liked Zara Mae Pickering's profile
May 21
Azjeg liked Azjeg's profile
Apr 27
Benewake LiDAR liked Benewake LiDAR's profile
Apr 12
Gremsy liked Gremsy's profile
Mar 12