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Altimeter calibration bug - can I downgrade the firmware?

jpbrajal
over 3 years ago

Hi,

I'm currently on 8.20 and I suspect a bug on the altimeter autocalibration.

Is there a way to downgrade to 7.80 or any lower firmware ?

Is there a risk to do so ?

Thanks in advance.

Jean-Pierre

  • 0 over 3 years ago in reply to jeremy_foobar

    Why the jumps in the pressure graph, this has been since the last update, and with the elevation reading being very sensitive to sudden changes. Have the setting to nightly, and also does anyone a clarification of what that actually does. 

    Thanks 

  • Former Member
    0 Former Member over 3 years ago in reply to Cozza
    Cozza said:
    Why the jumps in the pressure graph, this has been since the last update

    That shouldn't be happening.  I'm on the latest FW and my graph doesn't have blocks. It shows either a gradual increase/decrease line. 

    Cozza said:
    Have the setting to nightly, and also does anyone a clarification of what that actually does. 

    It's exactly the same as the old calibrate "not during activity".  You have to have a set sleep window, a Bluetooth connection and the phone's location permission set properly.  The watch will do a one time calibration using the location the phone provides and calibrates the altitude based on that given location with DEM.  I've been using it since I bought my watch a week after the 945 was released and it works great for me.  The only downside is if you sleep a fair distance above ground level.  The phone doesn't give elevation, just ground location, so it you live on the 7th floor of an apartment building it will calibrate to ground level of the apartment location and not your true elevation. 

  • 0 over 3 years ago in reply to Former Member

    Thanks for the reply, have tried a soft reset to no avail.

    OK thanks that's kinda what I thought, but hadn't really noticed any difference, will check connection with phone and permissions, cheers. 

  • 0 over 3 years ago

    this is my experience with barometric altimeter; I had a forerunner of the very first generation (I've got it from a friend working in a sport center shop few days before it was officially released in Italy so it was definitely a first gen of watch); well, altimenter was really crap...I calibrated it using DEM or GPS and in few hours in every condition of weather, air pressure etc the result was terribly wrong. I live at 52 m on the level of sea and it showed -15 or +150...completely unreliable. I used this watch for a couple of years and this summer I've got a warranty replacement (few weeks before the end of warranty...) with a new or refurbished watch. Well, I assume it's a new gen watch because from the moment I've received this new watch when I'm staying at home the maximum range I've is 52 m +- 2, so sometimes it shows 50 other times it shows 54...so definitely much much better than my first watch.  My conclusion is that it's hardware change and not software related. this is my experience.