the value of the north is not good.

[plexus]

Hi,
Now i see that I get an error in the value of the direction of the north. For 360° I read 19°!!!

Is the calibration ?
Alain

[skew]

You may want to check your Magnetic declination it changes several times a year goto the web site and see if it has changed since you did your parms file. If so try the new one in your qgc and see if that helps.

[plexus]

Thanks for the reply but that is not that.

Alain

[plexus]

I come back with that problem.
My hexa is in "plus", and the IMU ROT is -45°.
If the red arm is to the North I get +43° and not 0°.00.

Alain

download/file.php?id=2676&t=1

Northe.JPG (63.35 KiB) Viewed 7295 times

[bn999]

Rotate the board by 90 deg or change the sign on your IMU_ROT param.

[plexus]

Ok, I am going to try, but, I am going to see one thing:
on the ground, no in flight, motors stopped, the red arm is put in the 360,, I read 34°.
and in flight the value is going to 360° ( keeping the red arm in the north). The value is correct in flight.
After landing, stopping the motors, the heading is going slowly to 34°.
Why that drift ????
Can you explain ?

Alain