Wrong time and date after GPS sync!

Former Member
Former Member

So this one is a weird issue that few people seem to have. Got a new Instinct Solar Surf edition. Right off the bat, when syncing time with GPS, got the wrong time, date and sunset/sunrise, moorise/moonrise data. Time is set to auto, am in an area with excellent GPS connectivity. When I go outside, start an activity or simply set time  to sync with GPS, I get a weird time for a time zone that is UTC+12.45 and a date that is 48 days in the future (the watch thinks it's Oct. 17 2020!).

Did quite a bit of troubleshooting but no luck: 1. verified am getting a good GPS lock. 2. checked that the GPS coordinates provided by the satellite are OK (my exact location according to other GPS readings + Google Earth). Tried many times - day, night, changing location and even during a 2 h surf session (watch had wrong time and date after more than 2 h of soaking GPS signal with 5 GPS bars showing!). Of course, am running the latest version of the software...etc. through Garmin Connect + also tried multiple resets.

I even tought the watch was a faulty one, so got a new replacement one from the vendor. Still the exact same issue!

So basically, the watch only shows the correct time and date when synced with the phone (am 100% sure of that because I played with the time setting on my phone and the watch displays the phone's changed time when it syncs...). Quite frustrating as I bought the watch to get tide, sunrise, sunset data and moon phase data for surfing but all I have now is a watch that needs to be connected to a phone to show the exact time! For $450, quite a bummer...

Anyways, just trying to see whether someone can help:

1. Is it normal that the watch syncs the time with the phone? Am wondering whether this is not creating confusion within the software. Garmin support on the phone told me the watch syncs time with GPS only not the phone but I have ascertained with 100% certainty it reads the time from the phone (cf. above).

2. What could possibly explain a wrong display of time/date after a successful GPS sync and GPS indicating the correct position? It can't be an issue with the GPS signal - I checked 10 times and I have about 21 satellites overhead (GPS + Glonass), most of them with excellent signal (used a separate phone app to validate that), and am in suburban area with very few obstructions.

3. I saw on the forum that another user had the exact same issue, and surprise surprise, in Morocco as well!

Am not sure how the GPS sync. is implemented in the Instinct Solar. But if I had to guess, the GPS module is probably decoding the GPS signal properly (hard to see how it could not). So could this be an issue with the GPS module getting the proper GPS UTC time from the satellites but then failing to identify the right timezone and by default showing some totally improbable time and date as a result? Where does the Instinct watch look up the proper timezone it should pick up - is this done in  the watch itself based on position (in which case, there could be some coding error) or is this done through the phone where the Instinct Solar attempts to read from the phone what the right time zone is (and possibly try to fetch the date from an incomplete database or failing to read properly from the phone)?

At this stage, am guessing that probably the watch reads the UTC time from the GPS, then attempts to find the right timezone am at (UTC + 1) either in the internals of the watch or through the phone, does not find it and then simply displays a random time and date by default?

Any enlightened views on this? Would immensely help as am not sure when I can leave Morocco (plus, surfing season starting so might as well stay a bit more).

Thanks! Nico.

  • As far as I know, Garmin calculates the displayed time by adding an offset to the GPS-time, with the offset derived from the GPS-position. The offset is about 69825 minutes wrong in this case. This seems like a faulty or incomplete lookup table.

    I had always thought it would be nice if I could additionally set a GPS time offset myself, but no such luck so far.

    Considering that I wanted to buy an Instinct Solar, the amount of reported bugs in the firmware, including show stoppers like crashes during navigation, not recorded tracks, potential charging problems, is rather disappointing.

    I seriously hope neither Garmin's source code nor their in-house compilers were altered in the hack some weeks back.

    While I appreciate the version history always being published, I do think this needs more thorough beta testing. Or at the very least a faster reaction time to reported bugs on this forum.

    I have been using Garmin products for 20 years, and I have always loved them. But it's always been the same: When a device is end of life, its software is best.

    DC Rainmaker was right, it seems: Garmin's worst competitor is its own software quality. No idea if this comment will be accepted.

  • What version GPS firmware does the watch have? (Should be 4.50) also, is the gps almanac current? Go to watch settings, about, CPE : current

    Most gps I have used can pick up the time but still need to be told the time zone you are in, confusingly.. but either way the time the watch picks up from gps should be the correct time and date within 24 hours to cover all time zones, and when you go to world clock they should all be +/- an hour through the zones accordingly.

    If the CPE is not current this can take a while to update.

    Long shot - is it possible GPS is being spoofed or interfered with in you area? 

  • Former Member
    0 Former Member over 4 years ago in reply to 4241327

    Thanks! I did not make the connection with the recent hack indeed...What you're saying makes sense indeed - suspecting some issue with matching position with the right offset. To be honest, the watch itself seems good - no issue so far and build quality is a bit above what I was expecting. But not having the right time is a big no no (when I took it surfing, had no clue what time it was until I got back to my car...pretty useless as I need often to be out of the water by a certain time). And where I am the solar function is really useful.

  • Former Member
    0 Former Member over 4 years ago in reply to LeslieSnipes

    Thanks!! Yes, GPS version is 4.5 and the CPE file is current - deleted it, sync. it again, and checked the watch had an easy GPS lock (check mark + vibration + right location data). Good point re. which time zone: it's true that there is no setting to input the actual timezone, so guessing the watch either picks it from the phone or has a table stored that matches positions with timezones that may be updated regularly to keep track of summer/winter changes. That also could possibly corrupt but that would not explain the date so far off in the future. On the world clock widget, it gets interesting: even when I have the wrong date/time showing in the main watch face, the alternative time zones show correctly! I got excited thinking that the watch somehow stores somewhere the right time from the GPS. But discovered that it only picks up my phone's time: if I change the time on the phone (say I manually advance it by 5 min.), the other time zones times change (it still picks us the right hours to add/deduct, so my home EST is okay). The funny thing also is that am now certain the main watch face also picks up the time from the phone...whenever I sync, the time from my phone displays on the watch face. Which opens an interesting question: did Garmin really plan for the watch time to sync every time with the phone? That would be really odd as then, what's the point of allowing the watch time to be synced with the GPS also, that's creating a lot of confusion...

    As to GPS signal spoofing, will look more into it, but doubt it. If it was spoofed it would not show the exact location (lat and long) - am guessing if someone went into the trouble of tampering with the signal, they would tamper with the location data not with the time and date .And I checked on a separate app on my phone that am seeing lots of satellited and getting the right time from them.

    Cheers!

  • Former Member
    0 Former Member over 4 years ago in reply to Former Member

    Former Member

    hi,

    The funny thing also is that am now certain the main watch face also picks up the time from the phone...whenever I sync, the time from my phone displays on the watch face. Which opens an interesting question: did Garmin really plan for the watch time to sync every time with the phone? That would be really odd as then, what's the point of allowing the watch time to be synced with the GPS also, that's creating a lot of confusion...
    • it does sync with the phone
    • so, check the settings from your phone

    happy & safe sporting

  • Former Member
    0 Former Member over 4 years ago in reply to Former Member

    Hi OnlyTwo! Thanks. Yup - does pick up the time from the phone. And that works - phone settings are correct and when syncing with the phone it picks up the right time/date. But if I try to sync with GPS I get the wrong date and time...Meaning that when surfing, when I start the activity, the watch locks on the GPS signal and then changes the time and date to the wrong ones...Not great for an outdoor watch (if it always needs a phone to display proper time and date...). But the other useful functions (moon and sunrise/sunset) are all completely wrong...

    Any ideas what could be causing the issue?

  • Former Member
    0 Former Member over 4 years ago in reply to Former Member

    Former Member

    hi,

    thank you for the feedback

    forgot to mention

    first check the settings on Garmin Connect Web if they are correct and do a sync by saving settings

    • sync your watch via Garmin Express
    • and check again

    now the GPS, guess time zone playes a part in this

    • should be cleared with the Garmin Express sync
    • when not, time zone file could have a fault in it for your location
    • notify this via Garmin Support by calling them

    tried GPS sync at another location ?

    • result ?
    But if I try to sync with GPS I get the wrong date and time...Meaning that when surfing, when I start the activity, the watch locks on the GPS signal and then changes the time and date to the wrong ones...

    am a little confused with the description here

    • do you an actual GPS sync in the watch before starting an activity ?
    • or do you just start an activity and the time goes wrong ?

    did Morocco not change the daylight saving ? checked in 2018 Slight smile

    happy & safe sporting

  • Former Member
    0 Former Member over 4 years ago in reply to Former Member

    Former Member

    hi,

    read through the postings again Slight smile

    being it a new watch

    no harm done going for a reset to default

    check Garmin FAQ for this

    happy & safe sporting

  • Former Member
    0 Former Member over 4 years ago in reply to Former Member

    Former Member

    hi,

    check the time zone version on your watch please

    look for text "tz" in the garmindevice.xml file on your watch

    should be version 24.00

    when correct, you and the other user should contact Garmin Support

    happy & safe sporting

  • Former Member
    0 Former Member over 4 years ago in reply to Former Member

    Thanks again OnlyTwo! Really appreciate that. Tried all of your recommendations but no luck. Took also the watch for a drive and a bit of luck to try a different location but still no luck...Double checked the xml file and yes seems I have the version 24.00 also.

    Contacted Garmin support - they opened a file apparently and I also dropped an email to the developers team directly. The worrying things is that the other user apparently also sent them an email about this but clearly it has not been sorted out. Fingers crossed as I seem to have really run out of options (and of course, reset the watch to default settings many times).

    Cheers. Nico.