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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Click to collapse
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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Click to collapse
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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Click to collapse
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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Click to collapse
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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Click to collapse
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.
Related
Is there a navigation app that will work while "not" connected to a mobile network?
The built in one will work for a little bit and then stop with "Data connection lost"
It's just because it is streaming the data constantly. If google could pre-cache the data then it might work. I ran into this issue on a long trip where I went through an "Emergency calls only" zone.
You just need a GPS app which uses offline maps.
Search for them on https://market.android.com
You should expect to pay something for them - basically, you are buying the map content.
I haven't used any of them, so I can't give a good recommendation; they are available, though.
Note that the Eris uses QualComm's "gpsOne" series of GPS chips, which uses A-GPS (Assisted GPS). The assistance data comes from the mobile network, and pre-seeds the GPS unit with an approximate location, which helps in finding a "first fix" rapidly.
What that means in use is that if you start up the phone from a cold start in a location which is outside of cell coverage - and also a fair distance from the last location where the GPS unit got a fix, it might take as much as 60-120 seconds to achieve a first fix. Thereafter, it should be able to update fixes rapidly.
I have used the Eris while driving distances of 40-50 miles in mountainous regions without cell service (using the "My Tracks" application), and it had no problems figuring out where it was (Lat/Lon) at all times, but of course it did not have any "map" data for me to view - I was operating the phone in Airplane Mode to preserve battery. I have also used it to "mark" locations of interest after camping overnight and fishing in areas that were completely void of cell service. In those cases, I was literally powering up the phone, gettting a GPS fix (might take 1-2 minutes), recording the Lat/Lot to a notepad app, and then shutting off the phone. Worked perfectly for that, but I was only getting Lat/Lon in that case.
Make sure you operate the phone in Airplane Mode - the battery will drain quite quickly if you don't do that, as the phone is constantly scanning (at full power) to try and connect to a voice (1x RTT) network.
What I have not done, though, is spent many consecutive days in the wild with no service... so I am not entirely sure what would happen if the A-GPS data got too "old" and expired. The QualComm docs suggest that the gpsOne chips should be able to operate fully autonomously, but whether that happens depends on the software. There were reports way back when the Eris was still on Cupcake (1.5) that folks that traveled outside the US could not get their GPS to work correctly.
cheers
droidnew said:
Is there a navigation app that will work while "not" connected to a mobile network?
Click to expand...
Click to collapse
bftb0 said:
You just need a GPS app which uses offline maps.
Search for them on https://market.android.com
You should expect to pay something for them - basically, you are buying the map content.
I haven't used any of them, so I can't give a good recommendation; they are available, though.
Note that the Eris uses QualComm's "gpsOne" series of GPS chips, which uses A-GPS (Assisted GPS). The assistance data comes from the mobile network, and pre-seeds the GPS unit with an approximate location, which helps in finding a "first fix" rapidly.
What that means in use is that if you start up the phone from a cold start in a location which is outside of cell coverage - and also a fair distance from the last location where the GPS unit got a fix, it might take as much as 60-120 seconds to achieve a first fix. Thereafter, it should be able to update fixes rapidly.
I have used the Eris while driving distances of 40-50 miles in mountainous regions without cell service (using the "My Tracks" application), and it had no problems figuring out where it was (Lat/Lon) at all times, but of course it did not have any "map" data for me to view - I was operating the phone in Airplane Mode to preserve battery. I have also used it to "mark" locations of interest after camping overnight and fishing in areas that were completely void of cell service. In those cases, I was literally powering up the phone, gettting a GPS fix (might take 1-2 minutes), recording the Lat/Lot to a notepad app, and then shutting off the phone. Worked perfectly for that, but I was only getting Lat/Lon in that case.
Make sure you operate the phone in Airplane Mode - the battery will drain quite quickly if you don't do that, as the phone is constantly scanning (at full power) to try and connect to a voice (1x RTT) network.
What I have not done, though, is spent many consecutive days in the wild with no service... so I am not entirely sure what would happen if the A-GPS data got too "old" and expired. The QualComm docs suggest that the gpsOne chips should be able to operate fully autonomously, but whether that happens depends on the software. There were reports way back when the Eris was still on Cupcake (1.5) that folks that traveled outside the US could not get their GPS to work correctly.
cheers
Click to expand...
Click to collapse
I have a lot of experience with trying a few of the commercial (pay) Android GPS apps. Firstly, due to research, I found that there was, at the time at least, only a very small handful of commercial GPS apps which supported MDPI (the Eris' screen resolution). Shame because otherwise some of the ones which I can't remember by name sounded very promising.
There were definitely two which did work on the Eris. Like anything else, each one had it's own advantages and disadvantages. I thoroughly tested CoPilot Live for Android v8. It wasn't bad, and I see now on their main page advertising $5 for U.S. and $19.99 for all of North America (U.S. and Canada), which seems almost too good to be true, but I verified it on the Android Market. I don't remember having any particular problems with CoPilot, I just preferred iGo My Way 2009, but their website no longer even mentions the Android except for here and I don't see it on the Market.
That's too bad but I guess that helps you to make a decision on buying one if you do so.
Maybe it has something to do with how much iGo got pirated, as alluded to in this thread.
I did buy and am currently using iGo My Way, except when it's just a shorter trip, since especially on the Eris, there is a definite slow initial load time for the app (under a minute but slow in our impatient world). Once the app's loaded, however, it's lightning fast. Definitely recognizes wrong turns a lot quicker than Google Maps.
Another vote for iGo MyWay. Starts up in about 45 seconds, but it works perfect in landscape and portrait. Once its loaded its the fastest turn by turn I've ever used. (I've only used older model "JUST" gps devices though. FWIW)
apparently there is a modified version of google maps that allows cache of data. I have nothing to do with this program and have not personally used it. i am just reposting here:
*edit: removed old link see other forum link*
apparently you can load it in addition to regular google maps and have both of them on your phone.
"You can enable map caching (Menu -> More -> Brut Mod -> Read map from cache, Save map to cache). This will force GMaps to save map tiles to the SD card and read from the SD card first, before attempting to download from the net. You can connect via WiFi (or any other net source) and preload the tiles before you start your trip, thus making the maps available for offline use.
The preloading can be done by simply browsing the the route you will be travelling - just make sure you do it at the zoom level(s) you desire. I believe you can even use programs like GMapMaker to download the map tiles from a regular computer, but I haven't tested this method."
edit: found the post on xda http://forum.xda-developers.com/showthread.php?t=630887
edit 2: also enables use of google maps in other countries
starting p235, there is a discussion of some ownhere version that uses gmaps5.1. i believe it still allows downloading of maps to cache.
Hello,
Like some of the other users, I had GPS problems after installing these two ROMs: connecting to the satellites took a very long time, if at all. Below I describe my fix, gathered from searching on the web, including here on XDA, and by using trial-and-error testing. Hope it helps others.
Install GPS Test by Chartcross. This helps monitor the GPS activities. There are other similar apps out there, but I like this one for the purpose of monitoring the GPS.
Install FasterGPS, by Dominik Schürmann. This is to edit the file /system/etc/gps.conf. You could edit it manually, but I like the GUI of this app.
Check if your /system/etc/suplcert/cacert.txt is "MIIDazCC......neEj8Nq/", then under the advanced settings, make sure SUPL_HOST is "supl.sonyericsson.com", SUPL_PORT=7275. Each cacert corresponds to a particular SUPL server. The above cacert is for the Sony server. If the host doesn't correspond to the cert, then you will not benefit from a quick retrieval of GPS info via the internet. Instead your GPS will download the info from the satellites themselves at a very slow rate (50 b/s according to Wikipedia). Your GPS would still work, but it won't acquire a fix quickly. Sorry I don't know what the cert for Google is.
Set NTP server to something close to you. Some people suggest to enter several servers (more can't hurt), some people suggest not to do that (more does hurt, if the previous ones fail.) I imagine that, at the higher level, the ntp pool servers don't usually fail. Thus I choose a single server that is close to me. In addition, I stay at the "country" level instead of going down to the numerical prefix level. (I.e. I don't bother with 0.uk.pool.ntp.org.) I figure going down to the numerical prefix level would more likely expose me to server failures.
Set INTERMEDIATE_POS=1 (enabled), then set ACCURACY_THRES=0 (passing all positions). With this value GPS Test usually reports satellites "in view" very quickly [<= 1 sec]. [Note: "in view" not "fix".] When I set the threshold to something non-zero (even a large value like 5000), it takes several seconds to see them.
Set ENABLE_WIPER=1, which supposedly turns on wifi positioning. Not sure what that does, but sounds like it can help . I assume the GPS system reads info from the wifi to get a rough estimate position. GPS Test probably isn't affected by this, although something like Maps might.
Set REPORT_POSITION_USE_SUPL_...=1. Again this sounds like a useful thing. My trial-and-error testing didn't discover anything conclusive about this. If anyone know more, please let me know.
Set DEFAULT_AGPS_ENABLE=TRUE, DEFAULT_USER_PLANE=TRUE. These are probably already true by default, but I figure it doesn't hurt to be explicit.
Reboot your phone if you had to change the SUPL setting. I had to do this to see the change. Would love to hear your experience on this.
With the above settings, GPS Test usually reports about 10 satellites in view in about 1 sec; satellites signals popping up above 10 db in about 5 sec, and the GPS acquiring a fix with about 4 satellites in less than 30 sec. All this _inside_ my house, which is a timber frame house with tile roof. I get this even with airplane mode on, i.e. no network connection!
If I use GPS Test to download AGPS data first, then the fix could be even faster, at less than 15 sec. And once the GPS has acquired a fix then, within a short time span, it will do so again very quickly (< 5 sec). Thus I have no problem as I switch from app to app and the GPS sensor turns on and off.
If my AGPS data is several days old, I still can get a fix in about 1 min.
Still, sometimes no matter what I do, the GPS would take more than 1 min to acquire a fix. Not sure why this happens, but it usually occurs after I haven't used the GPS in a while. In those cases I might have to wait up to 5 min for a fix.
Notes:
I assume you have root (since you managed to install ROMs )
According to the official ntp pool website,
As pool.ntp.org will assign you timeservers from all over the world, time quality will not be ideal. You get a bit better result if you use the continental zones (For example europe, north-america, oceania or asia.pool.ntp.org), and even better time if you use the country zone (like ch.pool.ntp.org in Switzerland)
Click to expand...
Click to collapse
More about my choice of accuracy threshold: if a threshold is active, it seems like the GPS would wait for the signal of a satellite to be of a certain strength before reporting it as in view. I figure it is better to just grab all the satellites possible, even if there is no signal yet.
The app GPS Status & Toolbox, by MobiWIA - EclipSim is also a very useful monitoring tool. I like the feature that reports how "stale" the AGPS data is. Wish GPS Test had this as well.
Toggling on the GPS from the settings menu simply allows apps to turn on the GPS. This doesn't use any battery. Only when an app starts using the sensor does it take energy. I recommend having this on. Having said that, do make sure you don't have any rogue app keeping your GPS engaged.
Install NTPSync, by Dominik Schürmann again. This helps set your clock. Not sure if this is necessary, but it gives me a good feeling that my clock is accurate
gps
its still not working
zivalarasa said:
its still not working
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Click to collapse
After running GPS Test out in the open for, say, 1 min, does it report any "in view" satellite at all? Any satellite have signal > 10db?
GPS Test
HHest said:
After running GPS Test out in the open for, say, 1 min, does it report any "in view" satellite at all? Any satellite have signal > 10db?
Click to expand...
Click to collapse
GPS test runs and doesnt find any sattellite. It ran for around 10 minz
zivalarasa said:
GPS test runs and doesnt find any sattellite. It ran for around 10 minz
Click to expand...
Click to collapse
I assume you had GPS working at some point prior to installing the ROM? If you've done all the steps (particularly steps 3, 5, and very importantly 9), then I'm afraid I'm out of suggestions.
spelling?
On the off chance... perhaps you have a spelling error?
I find it quite easy to spell "sonyericsson" wrong, especially the ericsson part. Now I have a way to memorize it: "Eric" (that's easy), "Eric's" (as in something belonging to Eric), ericsson = "Eric's son"
Guys,
Lot of talk regarding battery life/ standalone/ accuracy of gear S apps for running.
Used both Nike and S Health- to me both were standalone.
Few bullets
1) some stated that even with GPS on and locked that s health still uses pedometer for distance? (is this true?)
2) I'm still confused if I need gear network AND/OR mobile network on/off - does this affect battery life- if I leave OFF all networks...will my run sync once I turn mobile network or Bt with phone on?
3) any way to get splits read to you (cannot believe this is missing)
4) I don't think this device will get through a marathon unfortunately
Yikes! Just did the car test (run shealth with hand out car) and I can confirm that it doesn't use gps for anything other than map. Feel duped
Relies on pedometer I think
Sorry for my blast posts. It is possible that it only records speeds in running range? I shook hands and didn't increase speed. Also noticed a bike option. Perhaps wrong about duped. Lol
Hello Jeffruby,
I've been in contact with Samsung about S-Health on Gear S and they confirmed that they are not measure the distance with the GPS, just the map (Totally insane!)
The Nike+ app is tracking the distance correctly with GPS though. If you have everything turned on (GPS, GSM, Bluetooth), then you would get probably about 4-5h of battery time. My goal is to use it on the next marathon and be able to listen on music for the last 60min of the race but i guess I need to run on 3:30 or something to make this possible
BUT, unfortunally the Nike+ app are missing the most important thing and that's the avg pace for the total run. It just show current pace and I don't really like that since it's changs so often so it's hard to see what speed you are runnig at.
So, yeah, I really hope for an update on either of these running apps ASAP!
HTC, thanks.! What a shame re s health app. How do you think it does distance for biking though if uses pedometer for distance?
The Nike app is close to being good..... I can't see the red on black, while your running you can't read scrolling info and of course the avg pace of run is the gold
Also in Nike app you have to turn on GPS manually, not from the app, if you want to track distance accurately. If you don't it uses accelerometer. With GPS on in general battery life is not good. My longest run was 30K in 2:45 had 18% battery left. Also there is one more strange thing about S health - calorie count maxes out at 1000
OK , so I did another test today - used shealth on bike mode. Stuck arm out car window with GPS on. Kept arm still. It tracked distance completely accurately. This tells me that the s health must indeed use GPS accurately. I think the jog portion only measures speeds in running or walking rates as it did not pass my car test.
The Nike app is a bummer as you can't verify GPS lock before it starts. Also the reasons mentioned prior.
The s health app is easier to read but doesn't show you 1 mile splits on the phone app. This is unacceptable.
Completely agree with the issues mentioned with nike+ Visual gps status before starting, the ability to display the info you want while running, and a always on mode during use would also be handy. Now I have to flick my wrist and wait untill the display goes on. It takes too much time and you're not seeing what's happening before you. A quick glance should be all. Currently i use a gear store app called screen awake for this.
Yeah, i have been logging miles with the Nike ap too. Its not perfect, but it works for me.
I have 79 miles all logged on my Gear S nike ap this year.
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app
Not to mention Nike app wastes battery with hr but doesn't record it.
The S Health app records continuous HR during your run. I'm not sure how the Nike+ app works to record HR data. Is it continuously tracking/recording HR data? Or does it do it intermittently when you activate the display and wait for the information to scroll (on the bottom of the screen) to HR?
glenner05 said:
Completely agree with the issues mentioned with nike+ Visual gps status before starting, the ability to display the info you want while running, and a always on mode during use would also be handy. Now I have to flick my wrist and wait untill the display goes on. It takes too much time and you're not seeing what's happening before you. A quick glance should be all. Currently i use a gear store app called screen awake for this.
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Click to collapse
In the Nike+ app there's a small round indicator in the upper righthand corner that turns green as soon as there is a GPS lock. Always on mode is great, but it increases battery drain, so I just do the wrist flick.
Jerome, I think he is referring to indicator if Nike gps locked in before you hit start run. No runner wants the first 0.1 mile not to be recorded.
htcdiamondswe said:
Hello Jeffruby,
I've been in contact with Samsung about S-Health on Gear S and they confirmed that they are not measure the distance with the GPS, just the map (Totally insane!)
Click to expand...
Click to collapse
Could it be that the person you talked to had no idea what they were talking about (my usual experience with samsung, sadly)?
I am asking because Gear S tracks distance even with data off. After the run, if i don't see a map, only a track of my steps(*), I think data was off, but I still get the same results. I took mine to Europe with me and still got the distance tracked on my runs, even though the SIM card in it wasn't working. Wouldn't that be a sure indicator that what Sammy told you is incorrect?
(*) when data is on, my tracks are superimposed over a map.
xendula said:
Could it be that the person you talked to had no idea what they were talking about (my usual experience with samsung, sadly)?
I am asking because Gear S tracks distance even with data off. After the run, if i don't see a map, only a track of my steps(*), I think data was off, but I still get the same results. I took mine to Europe with me and still got the distance tracked on my runs, even though the SIM card in it wasn't working. Wouldn't that be a sure indicator that what Sammy told you is incorrect?
(*) when data is on, my tracks are superimposed over a map.
Click to expand...
Click to collapse
Hello,
I guess I have to answer both Yes and No on that question
I've tried to reinstall, run without data, without simcard, yeah, tons of different test and it's always way off (map is accurate but the distance it shows is totally off). Another poster in this topic also had the same issue but then he told me to test and choose 'cycle' as training mode instead of running, and, when I did that, then S-Health tracks the distance accurate. So, with other words the application have support for tracking distance in that training mode but of some reason it seem to choose to track the distance by counting steps if I choose running/walking as training mode. So, i'm not sure, maybe your device of some reason have this working on all traning modes. I hope so, and, that someone can explain for me hoooooooooooooooooooow to change this
My gear s tracks distance very accurately when I run gps on. However with GPS off using pedometer it overestimated my distance by approx 0.1 per mile. So gps must work. I did discover as mentioned above, that at high speeds need cycle on.
Not sure if this has anything to do with anything, but my Gear S is the US ATT variety.
In my case, I am fairly certain that no maps are used for measuring distance. Maybe I lucked out.
And when I said my distance gets tracked earlier, I meant the tracks you see at the very bottom of the log in S Health, that correctly display where I took turns, looped back, etc. Without data on, there is no actual map behind them, with data on, there usually is (I had a few flukes before.) The pedometer would not know about turns taken, though.
BTW, I had issues getting a GPS lock for a while until I realized that my phone is messed up. Once I started using the Gear S in stand-alone mode, all was good.
Does anyone else have issues with their unit (I have the T-Mobile version) mistakenly showing their location as someplace they were HOURS earlier? My maps shows the location where I currently am, but then will occasionally report my location incorrectly as where I was earlier that day, which affects my weather and traffic reporting. Any thoughts?
Do you have high accuracy enabled?
I do have high accuracy enabled. Which the phone doesn't seem to understand the definition of.
If it is showing properly when you open maps but not in other apps, then it isn't the GPS that's the issue. Those apps aren't updating properly.
Mine is off by about 20 ft or so ... no biggie.
One thought though ... do you have background data blocked for the map app?
Background data enabled. I'll use the phone to navigate from work to school. The map shows me at school. Weather and traffic based around campus. Then, maybe an hour later, I look at my phone and it gives me the weather for my office, not school. I open google maps, it looks like I'm back at work, but I'm not.
I have had this happen several times. I open a gps Waze and Google maps, for a little while at work then minmize. A few hours later I will use the gps again at a different location and the gps will flip back an forth from the previous location, this will occur 30 min away or in another state.
I have tried to just shutdown the app and restart but still occurs. My only way to clear this has been to reboot the phone. This happen on both Waze and Google maps.
I found turning location off and back on works for me, but this shouldn't happen
Joe Smithereens said:
Does anyone else have issues with their unit (I have the T-Mobile version) mistakenly showing their location as someplace they were HOURS earlier? My maps shows the location where I currently am, but then will occasionally report my location incorrectly as where I was earlier that day, which affects my weather and traffic reporting. Any thoughts?
Click to expand...
Click to collapse
I've had this issue several times. With my G6 and V30. It happens when I'm using a GPS heavy app and then go inside where a good GPS signal cannot be found or where I'm on WiFi. Oddly. I feel like it happens more if that iZat crap is active. Happens a lot with PoGo.
Also get heavy GPS drifting when in High Accuracy Mode. GPS on LG devices seems to work best in Device Only Mode.
Sent from my LG-H872 using XDA Labs
This is driving me mad. I had to switch phone due to this issue on Galaxy S7 and now it happens on V30.
Took a factory reset for mine to work again. Was fine for the entire time I've had the phone, then out of the blue, just stopped working.
Sent from my LG-H932 using Tapatalk
zsunsun said:
This is driving me mad. I had to switch phone due to this issue on Galaxy S7 and now it happens on V30.
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Chiming in with "other phones have wonky GPS too": My Moto X Pure has had a couple instances where position appeared to be randomly jumping around, up to several hundred feet away with varying azimuth. Made for " fun" navigation in heavy traffic in unfamiliar cities.
But don't worry, autonomous vehicles will work without a problem. (Yeahhhhh....right....)
...
Autonomous vehicles are using a wide array of sensors to work, combine with deep learning, big data, etc. The GPS used in phones is not the same chip as the one used in a dedicated GPS device, even something as a sports watch as a much more precise GPS, optimised antenna, dedicated processor and optimised OS. I’ve been trying to use phones to track my runs for years and it always jumped around a bit. In a car, depending on the placement (direct view of the sky, for instance vs. blocked by the ceiling), on the weather, on the insulation of the car even, you can have issue with jumping signal. You can try to place the phone in a spot where the antenna has a view of the sky and it might be less of a problem.
I have noticed that the issue is with both Pokemon Go and Google maps. It is really frustrating, and sometimes nothing seems to help. On another site, they recommended installing GPs Status and Toolbox from Google play store. I will try that. If that does not help, the site said that the issue is with the GPS antenna.
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?