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I finally figured out what is causing the GPS low velocity tracking problem but I don't know why. The problem is with the aGPS cache.
Use a GPS utility program and set it to NOT automatically download GPS data when the utility program starts. Exit and then restart it. Clear the aGPS cache and immediately exit the program. (I used GPS Test but there are many utility programs out there). Then run JogTracker, Endomondo or whatever program you use for tracking your walks, runs, hikes, etc.
This forces the tracking program's connection to the GPS service to do a 'cold' start when the tracking program begins instead of relying upon the cached aGPS data. It will take about thirty seconds or so, maybe longer, but it will eventually lock on to enough GPS satellites in order to track.
I have tested this several times with the cache containing data and with it being cleared, the results are the same. The tracking programs will record an erratic track if the aGPS cache contains data upon startup even if the cache data is only a day old. With the cache cleared the programs perform flawlessly.
I have not noticed this glitch when tracking a route in a fast moving vehicle. I have not ridden a bike doing this so I can't vouch for that. I can easily duplicate this error when recording a 'slow' velocity track and not having the aGPS cache cleared using any of the tracking programs. I have even started tracking without clearing the cache and letting it track until I see the glitches appear on the tracking map. I exit the program, clear the cache and restart the tracking program. Perfect tracks every time. Go figure.
Do you have to do this every time you use something like Edomondo or just the first time? I downloaded that and haven't tried it yet but plan to soon.
this is a very interesting find
Sent from my ADR6425LVW using XDA App
feralicious said:
Do you have to do this every time you use something like Edomondo or just the first time? I downloaded that and haven't tried it yet but plan to soon.
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I clear the cache each time I use the tracking programs. I have not cleared the cache, run a tracking program and then ran it again after exiting without clearing the cache. Good question and I will find out today.
I had Endomondo on my Droid 2 up to my upgrade to the Rezound in January. I never had this problem at anytime while on my Droid 2. I did not have the JogTracker program then but I would not expect it to have behaved any differently than Endomondo did on the Droid 2.
I am going to alert HTC and Verizon about this.
I cleared the cache, ran Endomondo and JogTracker. Exited both programs and then restarted both programs without clearing the cache again. The first tracks recorded by each program were excellent. However the second tracks showed more deterioration in the recorded data although the erratic behavior was not as pronounced as it is when you first record without clearing the cache to begin with. I have run these programs at the same time and also individually, it made no difference in the data quality.
Also, I noted this behavior before the OTA hit my phone on January 26. So the OTA didn't have anything to do with this.
Use GPS Status.
I could never find the setting to not automatically download agps data with gps test.
Sent from my ADR6425LVW using XDA
I haven't tried your fix yet, but thanks for the effort, I'll give it a try later. My question is, why is there this problem with the phone in airplane mode? Unless the problem is with the cache itself and how it's utilized? Perhaps the program defaults to the cache first instead of the GPS itself? But if the phone is in airplane mode it doesn't have access to any aGPS data other than what's cached.
I don't fully understand how aGPS works with caching...
Is it caching the expected trajectory/location of the gps satellites? I know that the GPS control centers have to keep the satellites updated constantly throughout the day. Within a couple of hours GPS data starts to have noticeable decline if the data isn't maintained... makes me wonder why there's a cache at all... since it becomes so unreliable within hours.
thatsricci said:
I don't fully understand how aGPS works with caching...
Is it caching the expected trajectory/location of the gps satellites? I know that the GPS control centers have to keep the satellites updated constantly throughout the day. Within a couple of hours GPS data starts to have noticeable decline if the data isn't maintained... makes me wonder why there's a cache at all... since it becomes so unreliable within hours.
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Yeah, that's basically what I'm wondering--does the aGPS cache just fill in data points it expects you to be at, and that's more or less fine if you're moving quickly, but not if you're going more slowly? Doesn't really explain why I've seen points though that totally veer off the road.
tekhna said:
Yeah, that's basically what I'm wondering--does the aGPS cache just fill in data points it expects you to be at, and that's more or less fine if you're moving quickly, but not if you're going more slowly? Doesn't really explain why I've seen points though that totally veer off the road.
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I think it's the other way around.... the cache tells the device where it 'expects' a satellite to be at... but the satellite has moved from it's planned course due to a few unpredictable factors (reading up: ionosphere interference, solar winds, time dilation, atomic clock fluctuation) all things the gps control centers are constantly monitoring and updating the satellites with. Even a difference of a few centimeters (or nano seconds) can cause erratic gps locations. Thus starting with a clear cache and getting the most accurate location is best for short-term accuracy, but that cache fails over the long-term no doubt.
edit: i'm going to avoid commenting this thread anymore... I just got lost in a world of special relativity and general relativity articles and managed to give myself anxiety reading about 'the twins paradox'.... I'm gonna have to go lay down and try reading it again later... WOAH
relevant: http://www.reddit.com/r/askscience/comments/q1cvx/if_there_was_a_total_meltdown_of_society_how_long/
thatsricci said:
I think it's the other way around.... the cache tells the device where it 'expects' a satellite to be at... but the satellite has moved from it's planned course due to a few unpredictable factors (reading up: ionosphere interference, solar winds, time dilation, atomic clock fluctuation) all things the gps control centers are constantly monitoring and updating the satellites with. Even a difference of a few centimeters (or nano seconds) can cause erratic gps locations. Thus starting with a clear cache and getting the most accurate location is best for short-term accuracy, but that cache fails over the long-term no doubt.
edit: i'm going to avoid commenting this thread anymore... I just got lost in a world of special relativity and general relativity articles and managed to give myself anxiety reading about 'the twins paradox'.... I'm gonna have to go lay down and try reading it again later... WOAH
relevant: http://www.reddit.com/r/askscience/comments/q1cvx/if_there_was_a_total_meltdown_of_society_how_long/
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Ahh, ok, that actually makes a lot of sense. So the question then is, why is this happening at low speeds and not high speeds, or is it happening at high speeds and we just haven't noticed.
tekhna said:
Ahh, ok, that actually makes a lot of sense. So the question then is, why is this happening at low speeds and not high speeds, or is it happening at high speeds and we just haven't noticed.
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I'm wondering if at high speeds it knows to follow the 'nearest road' or something...
On these slower paths, is the gps systems on constantly? I know when I use navigatoin the little satellite is on the notificatoin bar with the green radio waves.
I'm wondering if the walking ones don't keep it on constantly, and instead switch between on and off very often in an attempt to save battery?
I haven't used any of these apps.. so i'm not sure.
Hello,
I have the following Problem, while in Idle the phone is consuming so much battery, any help ?
push
Which ROM release are you on?
I am on Stock Rom and have the latest ota 15.07
dafuq2111 said:
Hello,
I have the following Problem, while in Idle the phone is consuming so much battery, any help ?
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Click to collapse
There are quite a few threads on this already including what I wrote (pasted below).
<<<<
I had two types of standby battery drain - mobile data and wifi. I have fixed both of them through lots of trial and error. From my testing and looking on XDA at similar experiences of people on other phones, these are bugs in Android rather than anything Elephone can fix through updates (I'm on the latest 20160419 update).
I fixed the mobile data problem by creating Tasker profiles to keep the phone on 2G whilst it's connected to wifi. I can't post links yet but a search on XDA/Google will find you these profiles. Maintaining a 4G connection is unnecessary whilst on wifi, besides, some people have problems receiving calls on this phone whilst on 4G. If the phone is not connected to wifi (rare in London because it's everywhere even on public transport) 4G comes on. Best of both worlds.
The wifi drain solution sounds counterintuitive but it is simply to set it to 'always on'. With both of these measures, my standby drain has been 1% overnight for the last two nights and roughly 0.25%/hour during the day. Standby drain on 4G whilst moving around London with location on at least quadruples battery drain to around 1-2%/hour.
Some of my other settings will have an impact too. I find the auto-brightness calibration of the P9000 poor, so adjust brightness manually (which also saves battery life). NFC, bluetooth, etc. I only turn on when needed. I use Greenify and have all apps Greenified except Tasker, Textra, and Hangouts. I haven't Greenified any system apps except Google Maps. Location is always on but mostly device only (again counterintuitive, you'd expect it to be 'battery saving') unless I am moving around in which case I have a Tasker profile to automatically switch it to 'high accuracy'.
I tried to get Xposed working so that I could use Amplify too (see my other post) but that didn't work. Since I'm very happy with battery life now that's not that important anymore though it would be nice for the further tweaks it makes possible.
There are too many other variables to list and everybody's phone is set up differently. However, hopefully using some of the main big gains I've listed above you can fix your wifi drain specifically and improve standby drain generally.
Well, it's somewhat problably what keeps the phone awake, this occurs after factory reset, i already did the Tricks you've listed and on screen Features and so on are all off, there are no Apps who should keep the phone awake Cause it's happening Straight after factory reset so there are no other Apps..
Push
Finger print sensor or DT2W for sure. Disable them
On the latest ROMs it is the finger print sensor. Turn it off or go back to 20160810
Hello there,
I have a concern with my honor 7 (PLKL01B380) which his battery empties at high speed.
My system never comes in deep sleep. I lose almost 10% overnight. Since I disabled the update on the lock screen magazine, I've gained a little bit of autonomy.
What I do not understand is that the wifi reports that it is still active as I always cut the night. For information about the wifi, the relationship between the following two screen shots is strange. I do not know where to look for a solution. I did the update to the B380, I turn off wifi and sync during the night but still nothing. I have two sim cards, I know it consumes more but is that why consumption is continuous all night?
Thank you for your ideas.
I can't post images
You can found this here:
Code:
users.telenet.be/lenif/batterie1.png
users.telenet.be/lenif/batterie2.png
Lenif7780 said:
Hello there,
I have a concern with my honor 7 (PLKL01B380) which his battery empties at high speed.
My system never comes in deep sleep. I lose almost 10% overnight. Since I disabled the update on the lock screen magazine, I've gained a little bit of autonomy.
What I do not understand is that the wifi reports that it is still active as I always cut the night. For information about the wifi, the relationship between the following two screen shots is strange. I do not know where to look for a solution. I did the update to the B380, I turn off wifi and sync during the night but still nothing. I have two sim cards, I know it consumes more but is that why consumption is continuous all night?
Thank you for your ideas.
I can't post images
You can found this here:
Click to expand...
Click to collapse
Have u tried backup, factory reset and restore?
Hello,
Off course, i thinking about full reset but I don't like this idea because I don't want to lose time on reinstall my apps, organize in groups, reinstall all accounts and passwords .. etc.
I've searched in all parameters and I think i've found the two parameters causing trouble
1. As I say in first message, magazine unlock auto-update, set it to disabled
2. In localisation parameter / advanced parameters / Localisation Data / Extended menu (below) / Search parameters / Wifi Search, set it disabled -> this one make my wifi always on
Now, it looks better, phone going in standby, and wifi not always marked as activated in the graphical view of battery.
I'll see next night if it go to deep sleep :good:
Thanks
Well in my opinion it's better to waste a lot of time re-setting-up your phone than having a huge battery drain, but try a night more, it could be the solution you're on to:fingers-crossed:
I had battery drain problem too. I solved it just by switching off viber contact sync in viber general settings. It kept my phone awake with screen off, and my battery life was horrible. Let me know if it helps.
fanesp said:
I had battery drain problem too. I solved it just by switching off viber contact sync in viber general settings. It kept my phone awake with screen off, and my battery life was horrible. Let me know if it helps.
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I think that only applies if u use viber
Hi All.
I recently got an Amazfit Stratos and I am having a horrible time trying to gps track my outdoor cycle.
I have tried twice, and both times, the GPS just either:
*Intermittently records data
or
*stops recording gps data altogether.
Basic questions?
Urban areas and Woods... same issue
Urban areas are residential.. no high tall building
Weather was good on both occasions
Yes I am waiting for GPS lock
Heart rate and time measurement continue flawlessly (shows data for the entire ride). It's just GPS tracking that is totally weird.
P.S. It's not "drifting" or inaccurate.. it seems to only switch on the gps sporadically... recording "every now and then"...
No errors or issues reported during the activity.
Latest Firmware (Although last nights a new firmware popped up, haven't tried the activity with last night's firmware.)
Both previous activities was on latest firmware at the time. (Yesterday and the day before)
And the REAL issue for me really, is that my wife's Pace records perfectly on the exact same routes where my Stratos just can't get anything usable going...
I have logged "feedback" request with logs using the app, but have not had any response other than, thanks.. we may use your feedback in the future...
From my own conclusions, the gps works.. because when it tracks... the location where it tracks is accurate.. it just doesn't track constantly. See my attached screenshot of my last ride. (Where my wife and her Amazfit pace tracked perfectly)
Any Ideas?
Cant add the image due to post count... How do I add it to this post?
Have you tried factory reset of the watch? Procedure is to unpair it from the app, it will reset itself, start fresh clean and ask for a pairing.
After pairing it will load last 7 days of your work, while all other old data will remain in the app, on your Mi account cloud. What you will have to add separately are only the 3rd party watchfaces, if you have installed them before.
Strongly suggest you try this first, it takes 5 minutes of your time, and you will lose no data.
image
https://ibb.co/rcJXcyx
Thanks Nidza. I will surely try this. I have not yet as the watch is brand new. Upon receiving it It upgraded firmware 3 times from out of the box, and then I started using it.
I will give it a try, surely cant hurt.
Well what do you know. That factory reset seems to have done the trick!
Thanks!
Some points worth noting:
from the factory settings, a few watch settings did not pull through from the sync back to the app after factory reset.
Time format: My previous time format was 24h (Doubt that makes a difference)
Auto Sync: After factory reset, auto sync is off (I had it "on" before). Can't say if this actually causes any bugs to pop up? Maybe the watch tried to sync which interfered with gps functions? I used it yesterday with auto sync off and it worked well. I will investigate if auto sync on causes the GPS issue again.
Thanks again.
Hi guys, is it normal, that my Stratos's Gps show me the speed to much delayed. I checked it with my car, and the gps gets to the same speed as my phone's one, but maybe 10 seconds later. By skiing it can mean worse maximum speed measurement. It is like that with all the Amazefit Startos watches or I have a wrong one? Thanks for the answers!
It's not the same sampling frequency for a car as it is for a walking man. Watch gps do not need to detect non-human speeds, so there is a lower sampling. (Slower).
Same issue again FW version 4.2.8.0:
stops recording gps data altogether after a few minutes.
I've reset and unpaired the clock twice but the issue remains.
Any advice?
Hi Guys
I have an Amazfit GTS 3 and use it with the Zepp App on a Galaxy S10. I have the problem that the Zepp App suddenly drains my Battery in the Background while I don't use any specific feature on the Watch. I use the watch for showing me Notifications but I have set it to just let some Notifications through that I want. I have reinstalled the Zepp App but nothing changed. Does anyone know this problem and how to solve it.
Thanks
I had this issue with my GTS 3 and Samsung Galaxy S8. Just unpair my watch and waited for 1 month. Latest FW fix this issue. I recommend you to update Zepp app and watch firmware to latest version.
I will do that. Thanks a lot.
Same problem here with the latest Zepp app v7.2.9 on a Google Pixel 6a phone, watch firmware is up to date. It's the app that uses the most battery and does not let the phone go to sleep, there's a wakelock from the Zepp app that keeps the phone awake for hours.
I contacted Amazfit support but they are not helpful at all. Disappointing because the watches are decent, the watch battery life is really good, but the software on the watch and phone is full of bugs, some I can live with, but things like battery drain I will not tolerate.
Intrestingly, my problem resolved itself after some days. Maybe it is because I put the app into the Standby for not frequently used Apps in the Samsung Battery settings. I still get all the push notifications to my watch. I don't know if the Google Pixel Phones have such a Feature or if my problem got resolved in another mysterious way, but maybe it could solve your problem aswell, if you put the app into Standby.
I have the Zepp app battery usage set to Restricted and it still doesn't help. But you are correct notifications still come. Anyway, we should not have to set it to Restricted, this is clearly a bug in the Zepp app.
Having the same exact issue starting just a couple of days ago. Tried uninstalling the Zepp app, removing Bluetooth connection on phone, put the Zepp on Sleep or even hard stop, but nothing seems to work.
What I just did was to remove the watch from Zepp app and leave the app alone on the phone and see if somehow the connection between Zepp and watch is causing the battery drain on the phone.
BTW: I just upgraded the latest firmware on the watch and the Zepp app was just installed from PlayStore.
Hope someone knows how to fix this annoying issue. I like the watch a lot, but leaving the app draining the battery is not an option for me.
I fixed it by returning the watch. Nice hardware but garbage software and I don't tolerate battery drain. I reported it to them in Oct, nothing changed in 3 months, clear sign to move on rather than hope for a fix.
Ninja914 said:
Having the same exact issue starting just a couple of days ago. Tried uninstalling the Zepp app, removing Bluetooth connection on phone, put the Zepp on Sleep or even hard stop, but nothing seems to work.
What I just did was to remove the watch from Zepp app and leave the app alone on the phone and see if somehow the connection between Zepp and watch is causing the battery drain on the phone.
BTW: I just upgraded the latest firmware on the watch and the Zepp app was just installed from PlayStore.
Hope someone knows how to fix this annoying issue. I like the watch a lot, but leaving the app draining the battery is not an option for me.
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Hello, I have the same problem with the GTS 4 mini.
Has removing the watch from the Zepp app had any effect?
Have you found out anything?
Have you tried installing an older version of the app?
Thank you.
As I already wrote above my problem seemed to misteriuosly resolve itself. I don't really know why and how. I just put the app into the list of standby apps and I still receive all the notifications. However the Bluetooth Connection to the watch draws quite a bit of power. It's quite weird. Some days my phone has good deep-sleep percentages and the other day it drains the battery quite a bit while just beeing in my pocket. I think the WIFI and cellular Connection at where I study has an impact on it. I could write a full thread about my battery life in the everyday life vs at the weekend but thats not the main Topic here. All in all my problem with the Zepp app seemed to have resolved itself but my battery life is still inconsistent. When I look at the wakelocks from the Zepp App a lot of them are caused by updating the weather, so maybe you can try disabling the weather functionality of your watch if you dont regularly use it. And I also recommend to put Zepp into Standby. If that resolves your problem i'm happy and if it doesn't, you can always put the settings back that I recommended.
I hope that I could help you and that your problem got solved.
Have a great day
Fast_Lessy
Thank you.
I have found that if I disable the Alexa connection the issue is completely resolved. This is of course very annoying, because then I can no longer use Alexa.