Erratic BMM150

Grove is a modulated, ready-to-use tool set.
Much like Lego, it takes a building block approach to assembling electronics.

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rs
Pre-kindergarten
Pre-kindergarten
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Joined: Fri Apr 12, 2019 5:45 pm

Erratic BMM150

Post by rs » Fri Apr 12, 2019 11:54 pm

Hi,

I recently picked up a Grove compass, the Bosch BMM150 based one, V2

The output is very erratic.

I can do a very similar repeated calibration routines of 10s, but get very different offsets each time, despite me trying to keep the motion of the fig-8 the same each time.

And then on every run, a completely still device out in the garden returns readings that swing wildly plus or minus 10degrees.

Pretty unusable for me really.

Does anyone have better results? Could I have a faulty unit?

Any help would be appreciated.

Thanks

Rob

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bestlux
Kindergarten
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Joined: Wed Jan 30, 2019 11:51 am

Re: Erratic BMM150

Post by bestlux » Mon Apr 15, 2019 1:43 pm

Hello,
Shocks within 10 are acceptable. If you need a stable result. have you tried calibration by averaging?

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