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Here we go again: altimeter is wrong on fast ascent

Here we go again! Today while i'm coming at home from the sea, i tried for the first time navigation and voilà: altimeter was totally wrong! When i was near my home that is about 110m asl, altimeter reported 75m! I tried to calibrate it but when i set correct altitude, it started to count slowly to calibrated altitude like my Fenix 5X did; altimeter was set on continous calibration. More info here: https://forums.garmin.com/forum/on-t...on-fast-decent ! I can't believe it! Luckily this time i bought it on Amazon, so if things don't change quickly, i'll return it and i'll stay with my Spartan Ultra that never had this bug!
  • Former Member
    0 Former Member over 7 years ago

    Not exaclty.
    In my case it is really frozen although the altitude on my car navigation system has increased to 10..20 meters in the meantime.
  • Former Member
    0 Former Member over 7 years ago
    Maybe someone can confirm that when looking at the altitude immediately after powering the watch on, the reading is significantly higher than when checking the altitude reading 1..5 minutes later.
  • Today i received a new Fenix 5 Plus (i have returned previous for this issue and i had to try if it is only my watch related), out of the box, altimeter worked flawlessly (firmware on the wach was 3.20)! As soon i connect to garmin express and i installed sensor hub update, altimeter stars to exhibit this issue! Is there any way to revert back sensor hub firmware? I have just tried to roll back to 3.10 software, bt sensor hub firmware remain the same!
  • In your opinion the mentioned altimeter issue is caused by the sensor hub update? This should normally be easy to test and fix for Garmin...
  • In your opinion the mentioned altimeter issue is caused by the sensor hub update? This should normally be easy to test and fix for Garmin...


    I think this is not my opinion, i have tested it and i'm sure it is so! I just write to beta team like usually about this but i have never had a single reply from them since months! If only they roll back previous sensor hub firmware the problem would be solved! But i doubt they hear me, like usually...
  • Former Member
    0 Former Member over 7 years ago
    Although the system software(firmware) changed from 2.20 to 3.53, the Sensor Hub firmware is probably still the 2.10.

    Lets check it:
    Settings > About > sw version 3.53
    > DOWN button 4x > see the screen data below:
    ---
    GPS: 2.20
    WiFi 2.50
    CIQ: 3.0.0
    WHR: 20.03.32
    ANT/BLE/BT: 2.80
    Sensor Hub: 2.10
    ---
    Of course the firmware of Sensor Hub could be different having just old version stamp, but in the beta firmware packages 3.21 and 3.53 the Sensor Hub has still same file date/time <2018-05-31 13:07:40> and is binary same for 3.21 and 3.53.
    ---
    Official version using GarminExpress is <fenix 5 Plus software version 3.10> with a date 2018-06-16 and it is just for software and no update of SensorHub firmware.

    I think it is safe to say: Sensor Hub is really still 2.10 (version stamp AND ALSO its code).
  • As I said, when I received a new watch it came with 3.2 firmware and altimeter works correctly but I haven't checked sensor hub fw version ( I think it would been 2.00, I don't know). As soon as I synced with Garmin express and I unplugged the watch, it found a new software update, I selected install now and after that I saw on the watch screen "updating sensor hub software", than "updating ant + SW and Bluetooth SW" after this update, the watch doesn't reboot but after a test altimeter became buggy! So it's the sensor hub firmware that it's buggy, I think it obvious!
  • Former Member
    0 Former Member over 7 years ago
    Altimeter works better for me when I use the appropriate mode for Barometer:
    ---
    Changing from default:
    > Settings > Sensors & Accessories > Barometer > Watch Mode > Auto
    to

    > Settings > Sensors & Accessories > Barometer > Watch Mode > Altimeter
    ---
    Maybe also changing the recording period could help:
    > Settings > System > Data Recording > Smart
    to
    > Settings > System > Data Recording > Every Second
  • Former Member
    0 Former Member over 7 years ago
    Mines constantly wrong.... and I'm doing nothing. Re-calibrating by GPS every other day here at work.
    The norm should be 138 feet so anything between 128 and 148 I'd be happy with - but 65 is taking the mick. Just doesn't seem to hold... and I've not been anywhere that low around here.