Re: Strange problem with the compass

[Ken Evans]

280 is definitely way too high. Curious that it appears to be going through
zero during movement. I'm guessing the other 2 axes have much less output ?
If so the By, along phone, would seem to be faulty, although working with
too much sensitivity. It's behaving as though a piece of iron/steel is
attached to the phone !

I'm sure you've got this, but just in case, a calibration description is
the bottom of this webpage,
https://stonekick.com/blog/magnometers-accelerometers-and-calibrating-your-android-device.html
I'm sure this can be found elsewhere too.

On Mon, 27 Jun 2022, 15:32 lodrog...@gmail.com, 
wrote:

> what i would do if this was happening to me, from the first day of problem
> appaers
>
> easy way
> - hard reset and immediately on first boot, not even connected to
> internet, i will had to check the issue
>
>
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/osmand/4e608010-7f85-44e9-80f8-d415a230cac5n%40googlegroups.com
> 
> .
>

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Re: Strange problem with the compass

[Ken Evans]

Hello guys. I am quite familiar with magnetic measurements, compasses in
general. There is a glaring elephant in the room when it comes to using
these sensors on a phone.

If a phone case or pouch has a magnetic clasp, which many do, the magnets
used will nearly always put the sensors well out of calibration. This can
render them incapable of indicating North and get stuck in the wrong
direction.

They can easily be recalibrated, by moving the phone at arms length in a
wide figure of right pattern. However simply closing a case or replacing
into a pouch can loose cal again. Currently my phone, a Pixel 2 indicates
North in any direction !

For reference earth's magnetic field in the UK is about 45μT. It varies
around the world getting as high as 60 in certain places. Currently my
phone has a total field measurement of 168μT, hugely too high, caused
mainly by one sensor, the Bz. The earth's field is given by
H = square root(Bx^2+By^2+Bz^2)

Not sure what Maps does regarding calibration, although it's possible it
could handle the sensor data as is and make sense of it.

Bottom line remove suspect cases and recalibrate

Hope this is useful.

Ken

On Sat, 25 Jun 2022, 17:28 Peter B - pebogufi,  wrote:

> Two more tools to read hardware info:
>  + Droid Hardware Info / InkWired
>  + phyphox / RWTH Aachen University
>
> clemens...@gmail.com schrieb am Samstag, 25. Juni 2022 um 15:41:23 UTC+2:
>
>> Hi Greg, thank you! I installed SatStat on my old phone, and the Bx By Bz
>> values vary when I change the orientation of the phone, and they are
>> completely different to the values on my new one.
>>
>> I give up. Nevertheless many thanks!
>>
>> Greg Troxel schrieb am Samstag, 25. Juni 2022 um 15:10:12 UTC+2:
>>
>>>
>>> Clemens Jensen  writes:
>>>
>>> > I can't interpret the Bx By Bz values. SatStat shows this (pic 1 phone
>>> > directed to North, pic 2 to East, pic 3 to South, pic 4 to West):
>>>
>>> They are the three components of the magnetic field. That's what the
>>> phone actually measures and from that computes an orientation. I have
>>> no idea where you are, and don't even know the values around me. My
>>> point is that with two phones, I think you should be seeing similar
>>> values. By taking two of them outside away from metal, and orienting
>>> them the same, and seeing the values, and then repeating, you should be
>>> able to gain some insight into whether the problem is the raw
>>> measurements, or something later in the processing chain.
>>>
>>> In your case, with the suspect phone, it looks like all 4 positions have
>>> similar Bx/By/Bz values. Mine change as I rotate, but not in a way
>>> that's easy to understand.
>>>
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Re: Okay here is a question!

[Ken]

I occasionally use Osmand for hiking and was originally staggered by the 
battery drain even screen off. However I didn't use it to navigate, just to 
check my position now and then. I discovered that returning to the home screen 
before turning the screen off made a major reduction in power use. Returning to 
Osmand again later it would quickly satellite lock and show my new position. 

In this mode of course it will not announce turns because Osmand is dormant, 
but can show progress along a calculated route which has not yet been started.

Hope this is of some use.

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Re: Turning off screen automatically

[Ken]

Just received official 3.4.2 update today. Now have screen on/off option back 
again.

Best news in a long time !

Thanks dev guys !!

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Re: OsmAnd Energy (Battery) options -using a screen on/off timer

[Ken]

I too noticed "turn screen on" option has been removed. This is unfortunate and 
needs to be restored as soon as possible.

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Re: Turning off screen automatically

[Ken]

On Wednesday, 13 March 2019 01:39:47 UTC, OA  wrote:
> In the latest OsmAnd version 3.3.3 I can't find option "Turn screen on", 
> which I always set to 10 sec. I found it very useful and helpful in saving 
> battery. It looks like this useful functionality was removed from the latest 
> builds :( 
> 
> Anyone see the same?
> If it's still there, how to find it now?

Just noticed this exact issue with 3.3.6, using Android 9. "Turn screen on" was 
one of the best *stand out* features of OSMAND navigation. It both saves 
battery and unnecessary distraction while driving. I always showed of this 
capability to my friends.

I really hope it is reintroduced very soon.

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Re: Route planning problem

[Ken Bennetts]

Thanks Bart,
I think I have solved the problem
I set the from position and then the destination.  If I leave the screen
untouched then the trip will calculate and then draw on the screen and I
can then edit etc.
If I touch "GO" it will calculate from my home position giving a trip of
some 16,000km.

Thanks for your input.

On 11 Dec. 2017 3:22 am, "Bart Eisenberg" <barteisenb...@gmail.com> wrote:

> Typically, you long press your first location to get an orange marker,
> then menu/Directions from, and go there.
>
> On Saturday, December 9, 2017 at 11:43:35 PM UTC-8, Ken Bennetts wrote:
>>
>> I am sitting in Australia and trying to plan a route between two places I
>> have as favorites in England. I have been successful previously but now
>> find my home site in Australia is entering into the route.
>> Is there a configuration I have missed.
>
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Route planning problem

[Ken Bennetts]

I am sitting in Australia and trying to plan a route between two places I have 
as favorites in England. I have been successful previously but now find my home 
site in Australia is entering into the route.
Is there a configuration I have missed. 

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