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Amazfit GTR can't fix GPS

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ben_from_paris

Senior Member
Dec 29, 2012
147
25
And why can this be possible?, I mean, what's the difference if I have it on my wrist or not?

The GPS antenna is probably on the bottom face of the watch (the opposite side of the oled screen).
If the watch is tight on your wrist, the antenna is not well orientated to have a good signal over noise ratio, the GPS signal is weak. If there is "space", it can easily track the different satellites.
That's also the reason why even if the position GPS 1st fix is done, you can still lose position when you put the watch back and tight to your wrist.
But usually, the most difficult part with a GPS is the first position fix. You better wait at least >10seconds after it in order to correctly track the satellites, then it should be OK

Not very convenient, but better than to put your watch to the trash :)
 

marcinb24

Senior Member
Aug 10, 2009
132
13
Yesterday the GPS worked fine, yesterday there was an AGPS update and today literally ZERO fix for 30min, even a handheld does not help. I think agps played wrong ... Or GPS died in GTR.
firmware 1.3.5.37 - newet in EU.
 

VSparxx

Senior Member
Oct 23, 2011
154
38
Yesterday the GPS worked fine, yesterday there was an AGPS update and today literally ZERO fix for 30min, even a handheld does not help. I think agps played wrong ... Or GPS died in GTR.
firmware 1.3.5.37 - newet in EU.

What are you on about? According to huami this is exactly how GPS should work, in an email they sent me they stated that it passed all the in house GPS tests and performs on very high standards... So I'm sure we're all just dumb and actually the GPS is just the best on this device it's just we're holding our watches the wrong way.
/s
 

MikeViller

Senior Member
Jun 1, 2013
268
38
GPS in my house is not working good even when connected it get drop, but went for a walk outside took 20 second to lock and did not drop. will try in a long walk next time to see how it goes.
 

rafaclaa

Member
Jul 22, 2015
5
2
hey guys, I'm about to buy this watch (or the verge), but this GPS fix problem is a problem, the updates have fixed this problem? Can someone confirm? thanks
 

louiscypherbr

Senior Member
Oct 12, 2010
544
221
São Paulo
hey guys, I'm about to buy this watch (or the verge), but this GPS fix problem is a problem, the updates have fixed this problem? Can someone confirm? thanks
If you want a beautiful watch and don't care about GPS, buy a gtr, but if you want a real smartwatch, with GPS working, buy an stratos 3.
The gtr GPS is very inaccurate (even after last update my 9km walk is being measured with 5% inaccuracy, and maps shows bizarre movements. So gtr GPS is more a toy than a real useful resource.
 

PetraGuy

New member
Feb 2, 2020
1
0
If you want a beautiful watch and don't care about GPS, buy a gtr, but if you want a real smartwatch, with GPS working, buy an stratos 3.
The gtr GPS is very inaccurate (even after last update my 9km walk is being measured with 5% inaccuracy, and maps shows bizarre movements. So gtr GPS is more a toy than a real useful resource.

I have had my GTR for a month now......it's brilliant.
I have charged it two times.
Now it's 68% charged and one week ago since last charging time.

The GTR's gps is for me working enough fine, really astonishingly fine.
Mostly of my routes it's within "the road/path" I'm walking....sometimes it could be a bit outside but nothing big I could care of.
Anyway I don't see any problem within the cell phone screen....the errors only occurs when zooming in when I walk for an hour and not only test it outside door.
It's winter here in Sweden and I wear a big jacket and gloves.....I think the gps is working really fine from its conditions as pretty much fabrics/leathers often hides the signal.

My wife, daughter and father have GTR's also......men 47mm, women 42mm...we are all happy.
We love to use the watch rather than charge it every day.
 

marcinb24

Senior Member
Aug 10, 2009
132
13
does anyone know anything about any new update? Because there has been total silence since the January update, and so far frequent beta has been coming out ...
 
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JeeHaa

Senior Member
Aug 28, 2007
196
31
That was the conclusion a long time ago. They should have made a new hardware revision, not sure why they have not done so by now.
I also gave up hope and got a Huawei GT2. Great GPS/HR and with local MP3 storage, but lacking a few small useful software features that are present on all Amazfit devices. To me the most important: no display of distance based on steps on watch face.
 
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VSparxx

Senior Member
Oct 23, 2011
154
38
That was the conclusion a long time ago. They should have made a new hardware revision, not sure why they have not done so by now.
I also gave up hope and got a Huawei GT2. Great GPS/HR and with local MP3 storage, but lacking a few small useful software features that are present on all Amazfit devices. To me the most important: no display of distance based on steps on watch face.

No biggie about missing distance as it was botched anyway like any other feature they offer, it's never given an accurate(or even close to accurate) result, i have a particular distance which is about 5KM, and it's never given a result close to reality, i can't remember now the distance it was actually giving but it was way off, like 2Km off so all in all i don't think you're missing on a lot there and actually getting more from the Huawei device as it has the blood oxygen and the personal trainer feature, as well as obv the properly functioning features they advertise.
 

JeeHaa

Senior Member
Aug 28, 2007
196
31
No biggie about missing distance as it was botched anyway like any other feature they offer, it's never given an accurate(or even close to accurate) result, i have a particular distance which is about 5KM, and it's never given a result close to reality, i can't remember now the distance it was actually giving but it was way off, like 2Km off so all in all i don't think you're missing on a lot there and actually getting more from the Huawei device as it has the blood oxygen and the personal trainer feature, as well as obv the properly functioning features they advertise.

I's pretty important to me. We have a bunch of Mi Band 2/3/4 + Azamfit Bip in the family, and distance based on steps on these devices is actually pretty decent for walking (<10% off compared with GPS devices)!
Really missing this in the GT2. :)
 
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  • 4
    In other discussion, isn't the CXD5603 Sony chip also used in Pace and Stratos?
    Is it just the antenna that's badly designed or missing altogether?

    According to https://www.sunnic.com/english/05_news/02_detail.php?NID=213 , shouldn't it support Galileo & BeiDou also?
    [/url]

    The Sony CXD5603GF is used in all their products, from Pace to Stratos 3. This makes sense, as Sony manufactures the only GPS chip with 6mW. They integrate it with external RAM and "antenna".
    All the models with their own OS share the same GPS firmware "18344,eb2f43f,126_gps.bin", that has not changed since months (May I think). So the software part, that directly controls the GPS hardware has not changed for months (although amazfit claims otherwise), just the interpretation of the GPS module output changed with the watch firmware update (e.g. outlier removal, averaging...)

    GPS uses L1, L2 and L5 frequency. However, only one frequency is used in not so recent hardware. This is L1=1575.42 MHz
    1*s544FU9v2X_JOH-0Cr63CQ.jpeg


    Now the usage of multiconstellation is limited to several factors
    Is the chip supporting besides GPS also Glonass, Beidou, Galileo? Yes, definitely
    Is the firmware supporting it? Do they pay Sony for the alogorithm? Probably not
    Is there an antenna design, with a wide enough bandwidth and amplifiers for the full range, to get signal above the noise level for the different bands? No.
    As I and other already demonstrated in this thread, Amazfit decided to not include a dedicated external GPS antenna for the watches with metalic bezel, but to use the bezel and housing itself as a kind of antenna. And this turned out to be a very bad decision. Amazfit "fixed" it by more A-GPS updates, so basically the chip has a better assumption of satelite ephemeric data. The chip can get this information itself from the GPS signal, as it is encoded within. However, this assumes the device has a good enough antenna to decode the data without error.
    3
    After a successful all-day test of catching fixes on the GTR (on average 20-40sec each time - but in a steady position when determining) I did a test today on GTR and old Bip at the same time on the same hand :eek:

    View attachment 4893211

    As you can see, the GTR catches the fix more slowly than the Bip, and has a worse signal quality that does not improve with time ... As for the battery, I had about 90%, what is worse, on the way back I wanted to turn on the registration and GTR will not get through these 6 min fixa already on the way, bip caught fix after 20 seconds of walking.
    In the GTR either the battery below 90% or the temperature -2'C caused that he stopped catching the fix ...
    3
    hey guys, I'm about to buy this watch (or the verge), but this GPS fix problem is a problem, the updates have fixed this problem? Can someone confirm? thanks
    If you want a beautiful watch and don't care about GPS, buy a gtr, but if you want a real smartwatch, with GPS working, buy an stratos 3.
    The gtr GPS is very inaccurate (even after last update my 9km walk is being measured with 5% inaccuracy, and maps shows bizarre movements. So gtr GPS is more a toy than a real useful resource.
    2
    Does anyone know something of what happened with Amazfit app??? I search in web but no success, does anyone knows if in IOS the app is still available? I sent a email to amazfit support, but they stopped answering me a long time ago
    Today the app has been update and now the compatibility turned ok

    New App dated 19/09/2019
    In the new version they have removed the "button" for check update in the watch

    Like the feedback in the next posts, with the new APP, HUAMI have reenabled the compatibility between APP and most smartphone.
    But the app crashes when trying to open one of the recorded workouts

    Please note that somebody told me in a italian amazit related facebook group!
    I would never take a look at the worouts in amazfit app, because most of all I share them into Strava, and check them in the Strava web portal!

    The only times i opened them were when I have to check how many times my GTR looses the GPS signal during workouts
    Because in Amazfit app this bug show some blanks between the tracked routes (bad thing... but correct), instead Strava connect the 2 stop-start point with a STRAIGHT LINE (mmmh, not so useful)


    Andrea
    2
    Every GTR model made before October 2019 seems to have a defective GPS.
    Some users write on FB that they bought the GTR in October and that their GPS fixes within 10 seconds and the accuracy is perfect
    TD0hjNl.png