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mpu 9255 not working correctly?
#1
I apologize, if this has been discussed before.

I just received my second mpu9255 sensor, since the one before was faulty.

So I connected it to the rpi according to the manuals and it shows and I can calibrate (sort of) it using pypilot...

When I look at it in signal K instrumentpanel it only gives out pitch and roll... the yaw is blank... I fear that's not how it is supposed to do?
Also... the magnetic heading is not acting like I'd expect... the heading doesn't change according to how I am...

I must be doing something wrong, what might it be?
I'm a total beginner and appreciate feedback and help Smile

Cheers
Roy
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#2
The yaw is the heading, that is the expected behavior.
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#3
Ah... that was obvious, thanks!

What do you think about the heading not changing according to how the sensor is turned/moved? Or is that just becaus I’m testing it indoors and there’s not enough movement?

Example.
When I walk towards north it shows correct direction, but when I turn and head in the opposite direction the heading changes about 20-30 degrees, not the expected 180.

I guess I’ll take the testbed outside and give it a try there also.
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#4
Usually that means that your imu is not calibrated yet: https://openplotter.readthedocs.io/en/la...ation.html
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#5
Great! Thank you for the reply! I’m obviously too impatient.
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#6
Today I was finally able to install a correctly working MPU9255. This is the fourth try, the other three were all broken one way or another. It appears there're quite a few inferior MPUs being sold.

Run the calibration. If you can complete that successful, you are probably good. Otherwise you may also have an inferior sensor.
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