Flowcode Support Board

Posted: **Mon Oct 02, 2023 1:22 pm**

Hi Ben

Can you have a look if at the component BMM150 if is a problem reading Z axis?
It could be that at the Z axis MSB and LSB are swapped or not correct.
Somehow for this component, the register for z axis are not built same way as for x axis and y axis
If I read the registers directly I get reasonable values.

regards

Stefan

read register

: Snag_42be6d.png (149.46 KiB) Viewed 1288 times

register are not the same:

: Snag_49ac0b.png (134.2 KiB) Viewed 1288 times

for z

: Snag_431557.png (360.29 KiB) Viewed 1288 times

Posted: **Tue Oct 03, 2023 8:24 am**

Hi Ben

I am not sure, the X and Y axis are also not in correct.
When I read the registers directly I get different values. I have tested these new values
I used a magnet to test the XYZ axes and the readings seem to be ok.

regards

Stefan

small magnet

: Snag_45c4830.png (255.8 KiB) Viewed 1273 times

Magnet has two pol in this direction

: Snag_45ca5c1.png (12.03 KiB) Viewed 1273 times

I put the magnet on all the six side in the same way and read the values

: Snag_45e104d.png (171.03 KiB) Viewed 1273 times

Flowcode Support Board

BMM150 Bosch geomagnetic sensor Z axis problem

BMM150 Bosch geomagnetic sensor Z axis problem

Re: BMM150 Bosch geomagnetic sensor Z axis problem