Edge 540 Series - Recent Threads

RE: GPS time synchronization error

aweatherall — Fri, 24 Jul 2026 16:38:24 GMT

The APAC model is basically the same. There is an additional file on those units for a GPS location shift for China, but nothing I can think of that would account for a time offset. All times should be in UTC and then a time zone map offset is applied. The smallest time zone shifts are 15 minutes for regions line Nepal.

GPS time synchronization error

2985972 — Wed, 22 Jul 2026 17:30:04 GMT

Hello, friends! I need your help. I've encountered a subtle but very annoying problem with GPS time synchronization. When I use multi-band mode, the time is synced incorrectly, 1.5-2 minutes ahead. When I switch to any other mode, the time syncs correctly with other sources, such as my computer, smartphone, and so on. I think it wouldn't be difficult for you to test this on your devices and sync the time in different modes to see if this issue occurs on your devices.

This is really annoying. With this error, I can't see that I'm riding with friends on Strava. Strava Flybus also works incorrectly, showing me and my friends riding in different places, with a lag of those same 2 minutes.

RE: GPS time synchronization error

Luko79 — Fri, 24 Jul 2026 07:03:31 GMT

but the GNSS spoofing is not affecting the time, that is affecting the coordinates.

if you are brave, you can do a master reset (or just deleting the device.fit and garmindevices.xml at first).

if you make a new sport profile, that has also this bug? where do you change the gnss settings on the fly, in the main GNSS menu, or under the activity profile submenus?

aweatherall it is APAC model as i know, not international, maybe that is different?!

RE: GPS time synchronization error

2985972 — Fri, 24 Jul 2026 01:58:10 GMT

I'm located in the Ural region of Russia.

As far as I know, we don't receive the Japanese QZSS or the Indian NavIC (IRNSS) satellites here, so I don't think they are involved.

However, electronic warfare (GNSS jamming/spoofing) systems are sometimes — and in some areas possibly even continuously — active here. I'm starting to think that this could be one of the main reasons for the issue, or perhaps it's related to the specific combination of GNSS satellites visible in this region.

Since no one else seems able to reproduce the problem, it may be something that only occurs under these regional conditions.

RE: GPS time synchronization error

aweatherall — Thu, 23 Jul 2026 22:59:48 GMT

I'm not able to reproduce this issue on my 540.

What part of the world are you located in?

What GPS software version does the Edge show? Should be 16.01

RE: GPS time synchronization error

Luko79 — Thu, 23 Jul 2026 18:26:34 GMT

aviod the auto gnss, then use the stable MultiGNSS or GPS only then. (if only the MultiBand-MultiGNSS is the problematic)

i dont know how is the IRNSS or QZSS reception there, maybe the IRNSS L5 is the culprit (in Central EU or West EU where i live, these sat systems are not received but in Asia it has coverage)

RE: GPS time synchronization error

2985972 — Thu, 23 Jul 2026 17:51:11 GMT

I have already tested both.

A complete power-off and restart does not fix the issue. The time offset between GNSS modes is still there.

I also deleted the gmaptz.img file and synced the device again with Garmin Express, but unfortunately that didn't help either.

At the moment, the only workaround is to avoid using the Multi-band GNSS mode.

I have considered using the Auto GNSS mode instead, but I'm a bit concerned that if the device switches between GNSS modes during an activity, it might change the system time in the middle of the recording and corrupt the timestamps in the FIT file. I haven't tested this yet, so I'm not sure whether that can actually happen.

RE: GPS time synchronization error

Luko79 — Thu, 23 Jul 2026 17:24:05 GMT

but if you switch it off completely and on, do you still have this offset between the GNSS modes?

i assume you have the latest 31.33 (?) fw also and the latest time zone file (you can try to delete the gmaptz file from the Garmin folder and re-sync it again with Garmin Express or via wifi/BT, maybe it helps but i dont think)

i think it is an APAC version-related problem. aweatherall what do you think about it?

RE: GPS time synchronization error

2985972 — Thu, 23 Jul 2026 17:16:08 GMT

I usually put the device into sleep/suspend mode after each ride rather than powering it off completely.

Also, this issue is not limited to Strava Flyby. The Garmin itself changes the system time when I switch the GPS mode to Multi-band. The time shown on the device immediately jumps about 1.5–2 minutes ahead compared to my phone and computer. When I switch back to any other GPS mode, the time syncs correctly again.

So the problem is in the Garmin itself, not in Strava.

RE: GPS time synchronization error

Luko79 — Thu, 23 Jul 2026 16:38:04 GMT

and do you turn off the unit completely after every ride or just put in sleep/suspend mode and start from this state? and is it only on flyby or if you put a time of the day datafield on Garmin, is that also in 2.5min delay comparing to an accurate clock?

RE: GPS time synchronization error

2985972 — Thu, 23 Jul 2026 13:26:50 GMT

Yes, there is definitely an offset. When I switch the mode from multi-band to standard GNSS, the time jumps back by two minutes and then aligns with the actual time. The GPS version is 16.01, and the Garmin unit itself is the Asian version. My wife rides with an iGPSPORT BSC200, and the time on hers is correct. A possible reason is that electronic warfare systems are activated—either intermittently or perhaps constantly—in the area where I live.

Strava: strava.app.link/CswmeFAC04b

RE: gradient issues again after 31.31

Luko79 — Thu, 23 Jul 2026 07:51:55 GMT

you cant pedal 2 similar strokes, buddy 😂😂😂😂

gradient issues again after 31.31

4fbea11d46c74713ac579f27bdc62645 — Sat, 27 Jun 2026 15:45:55 GMT

I'm having issues again with latest update with gradient readings !!! Spikes of -8% and +8% everywhere !!! Absolute crazy. Have they F...k.... this again?

RE: GPS time synchronization error

Luko79 — Thu, 23 Jul 2026 05:56:29 GMT

are you sure that your unit has time offset? what kind of devices did your friends use (wahoo maybe?), can you share a strava link where this flyby offset exists?

i use 840 with multi-multi and i have (or had) no such a flyby offset

do you have international version or apac or any spec one?

gps firmware 16.01?

RE: gradient issues again after 31.31

1311649 — Wed, 22 Jul 2026 08:41:42 GMT

You re useless buddy, that is exactly what GARMIN says to do by the way. It solved my issues with the altimeter. You should at least inform yourself before commenting Radom dumb ***!

RE: gradient issues again after 31.31

Luko79 — Wed, 22 Jul 2026 08:39:32 GMT

a totally useless advice, nothing will change after that ...

RE: gradient issues again after 31.31

1311649 — Tue, 21 Jul 2026 22:01:53 GMT

Go on the Garmin 540, menu, history, totals

RE: gradient issues again after 31.31

achn2b — Tue, 21 Jul 2026 21:58:49 GMT

Erase the totals for what?

RE: gradient issues again after 31.31

1311649 — Tue, 21 Jul 2026 18:50:36 GMT

I had the same issue, you have to erase the totals, doesn’t affect any of your stats or previous rides, just erase the totals then do like the on/off button restart ( hold it for like 10 seconds) it will turn off and turn back on and all will be all ok

Looking for Edge 540 firmware file to roll back from 31.33

6491509 — Tue, 21 Jul 2026 06:23:26 GMT

the 31.33 doesn't work, and actually from 31 on i started to have issuse. 31.33 was the worst as the elevation calculation is completely wrong. I need to go back to 30.28 or somethijng else.

RE: gradient issues again after 31.31

6905872 — Mon, 20 Jul 2026 13:23:28 GMT

In fact I did, I even recommended advance grade(1) here to one of the user..its just that its only 80-85 correct and the delay is like 3-5 seconds.

This should have been fixed a long time ago by garmin..but i guess they just dont care anymore.

RE: gradient issues again after 31.31

4892873 — Mon, 20 Jul 2026 11:55:02 GMT

Why dont you just install IQ app like grade or sensibile grade? They work just fine.

RE: gradient issues again after 31.31

6905872 — Mon, 20 Jul 2026 06:42:20 GMT

I am already losing hope..gradient still not working..I am now planning to sell my garmin edge 540 and just switch to wahoo.
This is already so frustrating..Garmin can't fix it anymore.
Sorry guys, I can't recommend Garmin anymore.

Battery drain in sleep mode

blas — Sun, 19 Jul 2026 07:47:54 GMT

I've observed a big battery drain when device is in sleep mode. After lesss than 6 days battery level went from 39% to 10%. Not sure about the drain rate because I'm assuming the device turned itself off at 10% automatically. Before someone tries to be smart arguing against sleep mode please stop. This is clearly an issue as the device is supposed to last weeks in sleep mode and that was my previous experience. Not sure when this started happening, but at least 3 weeks ago.

edge 1040 solar no live strava segments after 31.30 update

j jungsten — Sun, 19 Jul 2026 01:56:29 GMT

Ive read through all of the previous threads...i think...i have tried all of the hacks and still have no live segments on the edge 1040. spent hours connecting and disconnecting all. none of the hacks worked for me. other than completely resetting the garmin unit ive tried it all. I dont want to have live segments bad enough to completely reset the device but surely Garmin you have come up with a patch by now?

IOS device, strava premium, garmin connect...garmin 1040 solar all updated to the most recent software. Garmin, any help here?