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[SOLVED] Compass doesn't work properly
Posted: Sun Nov 11, 2018 1:34 pm
by Tomator
I've just received 2 BV9500Pro and both have the same problem with compass. The "North" is suck to the phone's orientation. Compass calibration does not help at all. Yellow one sown N on 11 and black one - on 5. When the phone is being rotated the N shows some inertia, (because the compass application apparently uses gyroscope to movement detection) but always gets back to the initial position. I've launched the "Sensors" application and noticed that readings from geomagnetic sensor are stable and sensitive to the phone's orientation but much biased. The Y axis in yellow phone reads for 38µT to 81µT during 360deg rotation, in the black phone Y reads -60µT to -20µT. So one has bias of 60µT while the other -40µT. X and Z axes are also biased but not as much as Y.
This might mean the geomagnetic sensor readings are not calibrated so the compass cannot work. How can it be fixed?
Re: Compass doesn't work properly
Posted: Mon Nov 12, 2018 2:30 am
by Ellorion
I also noticed that the compass direction is not correct. I try to calibrate it, but it does not help. Once I move it f.e. 180 deg. it adjusts in a wrong direction for some reason.
Re: Compass doesn't work properly
Posted: Mon Nov 12, 2018 11:36 am
by PaulG2B
Same problem for me, incorrect location.
Re: [TRACKED] Compass doesn't work properly
Posted: Mon Nov 12, 2018 10:44 pm
by blackview_admin
Issue is now tracked, it should be fixed with a firmware update.
Re: [TRACKED] Compass doesn't work properly
Posted: Fri Nov 23, 2018 4:46 pm
by Syncorrax
I encounter the same compass problem with my bv9500pro (serial no 735). Bad news for an outdoor smartphone used by a sailor. Although I am absolutely satisfied with all the other functions of this phone (after fixing the PTT button problem).
Hoping for a timely solution from Blackview.
Re: [TRACKED] Compass doesn't work properly
Posted: Thu Dec 06, 2018 11:33 am
by phoenixkk
+1 Same to me, Hope this will fix after firmware update. But Again my phone doesn't do OTA update so just curious if anyone have the same problem as mine.
Re: [TRACKED] Compass doesn't work properly
Posted: Thu Dec 06, 2018 1:08 pm
by tiboponpon
Same problem.
When is the update for bv9500 pro planned?
Thank you.
Re: [TRACKED] Compass doesn't work properly
Posted: Sat Dec 08, 2018 10:32 pm
by blackview_admin
tiboponpon wrote:Same problem.
When is the update for bv9500 pro planned?
Thank you.
No infos about release dates, sorry
Re: [TRACKED] Compass doesn't work properly
Posted: Wed Jan 16, 2019 8:48 am
by Martino
Hi, I recommend running this movement several times to calibrate the compass.
Re: [TRACKED] Compass doesn't work properly
Posted: Fri Jan 18, 2019 1:29 pm
by Tomator
Martino wrote:Hi, I recommend running this movement several times to calibrate the compass.
I wrote in the first post "
Compass calibration does not help at all" because I tried and this didn't help. Magnetometer readings have biases and they aren't compensated even when calibration pattern is applied. Nad there is still OTA firmware update that could do this compensation.