Accel Calibration

[usbalbin]

Hi!

@Tjohoansson and I are now trying to calibrate the accelerometer, however it seems no matter what AHRS_ORIENTATION, one orientation is always reversed. We have the obal bord oriented with silkscreen up, pwm connectors in the rear, MPU-9250 to the left. The MPU-9250 has some arrows on it: X is to the left, Y is to the rear.

Reading the doc it sounds like we should use Yaw180. That does, after Accel calibration, give correct readings for pitch, however roll is inverted.

Are we doing something wrong?

[usbalbin]

Also, perhaps unrelated, we get warnings something about "main loop slow, 182/400Hz". Is there anything to do about that? cpu usage seems to be low for all cores.

[HefnySco]

Hi!

@Tjohoansson and I are now trying to calibrate the accelerometer, however it seems no matter what AHRS_ORIENTATION, one orientation is always reversed. We have the obal bord oriented with silkscreen up, pwm connectors in the rear, MPU-9250 to the left. The MPU-9250 has some arrows on it: X is to the left, Y is to the rear.

Reading the doc it sounds like we should use Yaw180. That does, after Accel calibration, give correct readings for pitch, however roll is inverted.

Are we doing something wrong?

try to make

Hi!

@Tjohoansson and I are now trying to calibrate the accelerometer, however it seems no matter what AHRS_ORIENTATION, one orientation is always reversed. We have the obal bord oriented with silkscreen up, pwm connectors in the rear, MPU-9250 to the left. The MPU-9250 has some arrows on it: X is to the left, Y is to the rear.

Reading the doc it sounds like we should use Yaw180. That does, after Accel calibration, give correct readings for pitch, however roll is inverted.

Are we doing something wrong?

I believe you can use QGC and select auto orientation and it will give you the propoer orientation of the board.