Develop Bugs

[Q] Barometer

Is there any app (besides the GPS) that uses the built-in barometer in the Gnexus?
Is there even a reason to have an app use the barometer?
Just curious.

JJHunterx said:
Is there any app (besides the GPS) that uses the built-in barometer in the Gnexus?
Is there even a reason to have an app use the barometer?
Just curious.
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I would assume any app that uses it will be GPS based, as it's used for locking on to GPS co-ords quicker. PressureNET is the only app, besides Google Maps, like you say, that I know that uses it.

An altimeter for instance could use the barometer. And of course a local weather forecast. I suppose that developers will use the readings to code some new apps in the future.
edit : this app use the GN barometer
https://market.android.com/details?...yLDEsImNvbS5ndWlsZHNvZnR3YXJlLmJhcm9tZXRlciJd

I believe that the strava app (for logging bikerides) uses the barometer.
https://market.android.com/details?..._result#?t=W251bGwsMSwyLDEsImNvbS5zdHJhdmEiXQ
The altitude information is much better than in the iPhone app.
Using the built-in barometer doesn't necessarily give you increased precision in a single position measurement, but it can radically reduce the noise in the z-component of multiple readings.

I use this one: https://market.android.com/details?id=org.ssandon.altimeter
But i noticed that the barometer and GPS elevation varied by about 400 feet. Has anyone noticed this? or is it just me?
I realize that i can calibrate the app, but will that effect my gps locking abilities?
Thanks

extremx said:
I use this one: https://market.android.com/details?id=org.ssandon.altimeter
But i noticed that the barometer and GPS elevation varied by about 400 feet. Has anyone noticed this? or is it just me?
I realize that i can calibrate the app, but will that effect my gps locking abilities?
Thanks
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I'm not familiar with that barometer, but knowing the basics of how GPS and altimeters work I can say that you have to calibrate the app for the readings to be of any use.
A barometer is very good at detecting changes in altitude but sucks at absolute numbers. A GPS on the other hand is awful when it comes to quick changes, but the long-term average is normally pretty good. What you should do is to calibrate the barometer app to a known altitude (if you're trecking in the Alps it's recommended to do this at least once a day). Either use a map, or let the GPS sit and average for a while.

WeatherMappr
https://play.google.com/store/apps/details?id=com.staircase3.openweather
Crowdsourcing pressure maps. Quite fascinating, actually.

[Q] Does the compass calibrate itself?

The Galaxy S4, S5 and Note 3 all have a rather cumbersome magnetometer (=compass) system installed. Out of the box the compass is not calibrated, it does not point to north. You have to calibrate it yourself using a lengthy process of turning the device about several axes repeatedly. And everytime you turn off the device, the compass looses calibration. Even if you dont turn it off it tends to get less precise over time, so you need to recalibrate every 2 months or so. Makes using apps like Google Sky Map almost impossible.
How is the magnetometer chip in the Tab S? Will it automatically calibrate itself (like most other phones), or does it need calibration?

klausa2 said:
The Galaxy S4, S5 and Note 3 all have a rather cumbersome magnetometer (=compass) system installed. Out of the box the compass is not calibrated, it does not point to north. You have to calibrate it yourself using a lengthy process of turning the device about several axes repeatedly. And everytime you turn off the device, the compass looses calibration. Even if you dont turn it off it tends to get less precise over time, so you need to recalibrate every 2 months or so. Makes using apps like Google Sky Map almost impossible.
How is the magnetometer chip in the Tab S? Will it automatically calibrate itself (like most other phones), or does it need calibration?
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Sorry cant help here. I got the 16gb version yesterday (sent back for Bestbuy 32gb). All I did was with wifi on open maps let it load my zone. Quit it then turn off wifi and open map and it found me and as I turned with the tablet the map turned so it new which way I was facing. I have no clue if this helps. So the GPS was working.

[Q] Sensors draining all the battery even in sleep mode

Hi guys, even though my Battery Life is certified as good, the "Screen time" use of the phone is only about 2 hours of light use. I found it curious, so i've took a closer look after i rooted my 4.2.2 stock version rom, just to find out that my Panasonic 3 axis sensor (gyro) is allways on and the light sensor is on just as well but for about the quarter of the duration. I specify that i do not use the automatic brightness or other apps that might use one of these 2 features in standby. Any advice is well recieved, thanks

Always on display problem

This is an issue with my note 3 running a note 7 rom (Yes, I know it's not a real note 7). The always on display used to work but recently when I turn off the screen, the clock shows for a few second before flickering and turning off. Is it because I updated the app or i accidentally changed a setting. I tried disabling keep screen turned off but it did not work.
Please help!!!

Are you certain that the Note 3's hardware supports AoD? Just because it is an AMOLED display doesn't mean you should assume it works
If you're certain, you can try re-flashing the ROM...

I'm running the note7 rom on my note 3 as well and opted to ditch the AoD screen. It might be just my phone being near death but it stays on in my pocket too. It's also a battery hog because it's completely different type of panel i believe. The fact my phone's knackered might be the reason i don't have your problem as maybe it's not trying to detect darkness and maybe ypurs is, albeit incorrectly due to incompatible hardware. Just a thought anyways.

Karnax_ said:
I'm running the note7 rom on my note 3 as well and opted to ditch the AoD screen. It might be just my phone being near death but it stays on in my pocket too. It's also a battery hog because it's completely different type of panel i believe. The fact my phone's knackered might be the reason i don't have your problem as maybe it's not trying to detect darkness and maybe ypurs is, albeit incorrectly due to incompatible hardware. Just a thought anyways.
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The strange thing is that it works when i'm charging.

I found out what was wrong with the aod. Everytime i turn the screen off, the device will be put into deepsleep mode. So I acquired a wakelock and the cpu was kept running so the aod was shown. But I thought it might drain my battery so I set the maximum number of cores to be awake while screen off to 1.

Can anyone of you recommend a good sleep-tracker wristband + Android app?

Hi everyone,
I recently heard about these fitness/health/sleep-tracking wristbands that are apparently able to grep your heart frequency, log it and also wake you up while you're not in deep sleep state to make you less tired in the morning.
Before accepting that being tired constantly and dependent on caffeine injections to the heart is my life now, I'd like to try that out and see where it leads.
Has anyone of you tried one of the billion devices for this purpose and can recommend something? My main issue is that it A) needs to work properly, but also B) needs an app that is halfway decent at least. I'm grateful for any hints.
Kind regards!

NovusDeus said:
Hi everyone,
I recently heard about these fitness/health/sleep-tracking wristbands that are apparently able to grep your heart frequency, log it and also wake you up while you're not in deep sleep state to make you less tired in the morning.
Before accepting that being tired constantly and dependent on caffeine injections to the heart is my life now, I'd like to try that out and see where it leads.
Has anyone of you tried one of the billion devices for this purpose and can recommend something? My main issue is that it A) needs to work properly, but also B) needs an app that is halfway decent at least. I'm grateful for any hints.
Kind regards!
Click to expand...
Click to collapse
Sleep as Android is a great app I've been using for over a year now. It has great integration with Android Wear watches, Xiaomi Mi Bands (Requires external paid app but it's worth it.) and some more trackers (Full list here, https://sleep.urbandroid.org/documentation/integration/wearable/). I personally use the Xiaomi Mi Band 2.
The app detects if you're in a deep sleep or light sleep and wakes you up when it thinks you're light sleeping. It also has compatibility with Philips Hue Lights to simulate a sunrise. It gives you advice on how to improve your sleep, prevents jet lag and oversleeping and much more. I highly recommend this app.
Sleep As Android:
https://play.google.com/store/apps/details?id=com.urbandroid.sleep&hl=nl

MI band 2

I know Fit Bit watches can track your heart rate but I am not sure if it can wake you up..... But if you are interested in running or jogging or walking or basically just being active, you can get Fitbit to track your heart rate and daily steps.