[SailfishDevel] QMagnetometer info from Jolla

Lorn Potter lorn.potter at jolla.com
Mon Apr 7 06:36:29 UTC 2014


Hi Robin,

I just tested the mag sensor on 1.0.4.20 using a show_magneticflux 
example app, which uses QMagnetometer and it seems to be working.

There were some eariler version of sailfish that did not have a working 
compass/mag, but these were fixed. Odd that compass works but mag does not.
What version of sensorfw is installed?

Perhaps you could email me the journal logs as well?

Thanks-
Lorn

On 07/04/14 01:32, Robin Watson wrote:
> Hi,
> Sorry I got the anticipated magnitude wrong there - the observed 
> values (the order of tens of uT) seem OK actually, but they never 
> change, so I still have some sort of problem with QMagnetometer.
> Regards,
> Robin.
>
> 2014-04-06 17:15 GMT+02:00 Robin Watson <robin.james.watson at gmail.com 
> <mailto:robin.james.watson at gmail.com>>:
>
>     Hi,
>     I am having trouble getting any sensible magnetometer information
>     from my Jolla. I create a QMagnetometer instance, and start it,
>     and it triggers readingChanged() regularly. But when I examine the
>     QMagnetometerReading values, they never change, and are not
>     sensible magnetic field values. (I get around 10^-5 for each of x,
>     y and z, whereas I would expect the order of 40-50 nT for the
>     magnitude).
>
>     Using QCompass and QCompassReading, I can get sensible compass
>     azimuth data - so the device magnetometer is presumably
>     functioning OK. I can also get accelerometer data OK.
>
>     My Jolla runs Sailfish 1.0.4.20, and I'm using Qt 5.1 for Mer.
>
>     Is the QMagnetometer sensor something that is just not working
>     yet? If not, when can we expect this feature?
>
>     Thanks and regards,
>     Robin.
>
>
>
>
>
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