OpenMarine

I have openplotter V1.2.0 alpha
I try to connect MPU9255 as suggested as a best MPU on this forum

I have a very strange behaviour, when sensor sits flat - horizontal on the desk:

It shows Hill: 71, Roll: 82
When I am trying to start calibration and do "boat level".
it calibrates to [0.75,-061,-023]82.68

When I trying to move sensor in different planes it Boat on the image reacts but also strange:
1. tilts in both hill and hill directions.
2. Even if I rotate sensor 30 degrees in in hill (x) direction it turns and then comes back to vertical position. 
3. In both directions (x and Y) Looks like angle is 2 times less then expected.

imu.accel in scope shows only two from 3 values changing



Attempt to do Accel calibration shows almost flat disk far away from "globe" when I turn sensor slowly in 3 dimensions..

Could you help me confirm is this MPU issue or am I misconcepting something?
Is some manual calibration I need to perform? 



Viktor

I have ordered more than 50 of these sensors, and sometimes there are defective ones that do not have all the sensors working. It sounds like you only have 2 out of 3 accels. Could you try a different mpu?

(2019-01-22, 08:39 PM)seandepagnier Wrote: [ -> ]I have ordered more than 50 of these sensors, and sometimes there are defective ones that do not have all the sensors working.   It sounds like you only have 2 out of 3 accels.  Could you try a different mpu?

Thanks, it was broken sensor.
Another one works perfectly.