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peterleinchen is offline peterleinchen
2016-06-18 , 06:07
Posts: 4,118 | Thanked: 8,901 times | Joined on Aug 2010 @ Ruhrgebiet, Germany
#1811
Originally Posted by zagrim View Post
Has anyone had issues with the phone compass when using TOHKBD? Static magnetic field shouldn't affect the calibration but in my experience it does.
Yes! (10 chars)
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zagrim is offline zagrim
2016-06-19 , 04:44
Posts: 51 | Thanked: 41 times | Joined on Feb 2015 @ Mansester, FI
#1812
Originally Posted by rolh View Post
It could be that the magnets in TOHKBD are too strong for the Jolla's magnetometer and cause it to saturate. In that case, calibration doesn't help.
D'oh!
I would be great to somehow verify this (not that it would change the fact but it's good to know for certain), but I guess there's no way to access the magnetometer readings outside of kernel... or is there?
 

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rolh is offline rolh
2016-06-19 , 06:01
Posts: 7 | Thanked: 24 times | Joined on Mar 2016 @ Sweden
#1813
Originally Posted by zagrim View Post
D'oh!
I would be great to somehow verify this (not that it would change the fact but it's good to know for certain), but I guess there's no way to access the magnetometer readings outside of kernel... or is there?
The sensors should be available in userspace. Have a look at, for example, Messwerk [1], it should allow you to visualize (and log) the sensor data.

[1] https://openrepos.net/content/cfr34k/messwerk
 

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zagrim is offline zagrim
2016-06-20 , 03:49
Posts: 51 | Thanked: 41 times | Joined on Feb 2015 @ Mansester, FI
#1814
Thanks @rolh for the tip.

Ok, case confirmed with Messwerk. The readings immediately go to the bottom of the scale (which seems to be around -2 mT) when TOHKBD is attached, and don't move from there regardless of the device position.



Well, I can live with that now that I know what it is about...
 

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