Elevation gain totally wrong

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113 comments

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    Sven Erichsen

    Right now I am ashamed of uploading my rides with those numbers to Strava as most of my followers know the area and they know that the numbers are hilarious! I always try to correct elevation gain as fast as I can so noone sees the bullshit numbers.

    I always tell people to throw away their Garmin devices and get a Karoo, but I am making a fool of myself like that.

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    Anna Ronkainen

    Yup, still an issue for me as well (but only in Germany, not in Finland). I don’t care enough about the elevation numbers to always remember turning mobile data off for the ride, and when I do, I just forget to turn it back on at the end instead...

    One recent example, the second half was following a river so pretty much completely flat:

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    Sven Erichsen

    @Anna so you are telling me that turning off mobile data does the trick?
    Is every spike in my elevation graph when the Karoo calibrates itself?

    If that helps, I'd be very happy. I'll try that.

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    Anna Ronkainen

    Yes, they don’t disappear completely but there are a lot fewer of them so the numbers are almost realistic.

    The following day I did indeed remember to turn mobile data off maybe 15 km from the start (the actual elevation gain should be around 400 m) and then forgot to turn it back on to upload the activity...

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    Anna Ronkainen

    For comparison, here’s a ride recorded on the same unit in Finland maybe a week earlier, everything looking good:

     

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    Sven Erichsen

    I'll try that tomorrow. But I remember that I set elevation calibration to manual one day and the numbers were bad too... We'll see.

    @Staff
    Nevertheless the auto-calibration should be there to improve the results and not to generate fantastic wrong numbers.

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    Anna Ronkainen

    Manual calibration probably does not help here, I’m afraid. A couple of months ago I tested all four combinations (auto and manual calibration with data on and off) and got the best results with auto calibration and data off.

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    Sven Erichsen

    I tried it today. As a result I can say that the numbers are way better. Still a delta of 170 metres at a total of 260 metres. which is still bad.

     

    Before correction:

     

    And after correction:

     

    @Staff

    Any reactions?

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    Markus

    I had this problem about a Year ago,when no mobile Network was available, while a simcard was active. When i removed the sim it worked better, but still far away from any other Bike Computer with a barometer.

    I think the reason is a bad Hardware-Design, so they cannot chnage much by Software. (otherwise they would have done it already)

    I sent my device back ( i liked the Display and also Battery life was good for me but when not even the main-Functions are working it is a case for legal guarantee in EU..)

     

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    Sven Erichsen

    I sent a request linking to this thread and I got response from the support team. To make it short:
    The issue is well known for European users and they are working on a solution. They think a software update can fix it, but the problem seems to be complex.

    Workaround:
    Just remove the SIM card. Turning off mobile data is not enough.
    I did a test ride today with estimated 169 meters elevation gain and my Karoo 2 unit recorded 171 meters (total distance of 55 km).
    So without SIM card the elevation values are as precise as can be.

    Not really a great workaround but it's good to know that there is hope to get it fixed within the upcoming updates.

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    Anna Ronkainen

    Yeah, this is a weird one, especially considering that it only affects certain countries. I guess it must be something specific to the particular GSM networks’ settings that causes this. Fortunately I only ride in Berlin/Brandenburg, so any actual altitude gains are basically just rounding errors so I don’t pay too much attention to them in any case...

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    Felix Pruemmer

    Currently on a multi day trip from Switzerland into southern Germany. Once in Germany, Elevation data went crazy. I have a Swiss SIM card (yallo) that remained in the Karoo 2, with roaming disabled. Will take out the card tomorrow.

    two weeks ago I was cycling in Germany with a German SIM card. Everything worked fine (Aldi SIM card).

    you can watch the elevation data field fluctuating in ride, with the grade field jumping to funny values.

    a while ago I had these problems in Switzerland too, and I thought this was fixed.

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    Brandon Babcock

    While my elevation gain is not off, the 'current elevation' is rarely accurate - almost every ride I start requires to me 'recalibrate' the elevation. I've gone through a few K2 units, all of them have this issue. 

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    Sven Erichsen

    This issue seems to be highly restricted to the area of usage and also the type of SIM card. I was always using an O2 MultiCard from a business subscription.

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    Anna Ronkainen

    Mine is Lidl Connect, using the Vodafone network in Germany. As mentioned earlier, the same unit works flawlessly in Finland with the same SIM card (roaming enabled).

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    Christian K.

    I got a new Karoo 2 device in July because of a different hardware problem. With the new unit I have the same problem as described here. On a short ride of 45km I got +350hm. After some rides I get in contact with the Hammerhead support and they confirmed me it is a knowing issue and they will fix it in some of the next releases. Exact words are:

    ... We hope to see a fix for this bug in one of the next releases - the team has a fix in testing now. I am sorry for the inconvenience! ...

    I have no sim card in use.

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    Grzegorz Ossolinski

    Hi.

    In my opinion, the problem of the height jump and erroneous data of the sum of the altitude difference are the vibrations transferred to K2. When you bump into bumps or ride on cobblestones, the K2 goes crazy with heights of + and -.

    I am very curious how it works on MTB or Gravel bikes when there are only bumps on the road. When I go back to the asphalt, the problem is completely gone, a jolt is enough and the height jumps up and down.

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    Sven Erichsen

    Nah I don't think so. Removing the SIM card makes my K2 work perfectly.
    Can't imagine how this could be related to vibrations. It's some kind of weird software problem which btw is still not solved.

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    Anna Ronkainen

    Ok, now I got a case of this happening a lot (Karoo says ascent 5431 m which Strava corrected to 2200 m) in Finland as well, before this I have only seen the odd spike or two per ride. Somehow mysteriously the spikes disappear somewhere around the 110 km mark though, near the point where I finally turned battery saver on (and got within ~25 km of the Russian border)...

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    Sven Erichsen

    Please do the exactly same ride again tomorrow with the SIM card removed and check if it helps, Anna ;)

    Well today again a new update. Still no fix for our issue. Maybe in 10 days...

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    Grzegorz Ossolinski

    I received information via email from Hammerhead that they are working on a fix for this problem and the update is to be released in 3-4 issues of the update, in my opinion, sometime in September / October. I trust them and wait patiently.

     

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    Sven Erichsen

    Sounds good to me. We'll see

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    Olivier Pieret

    @sven hello I have the same problem. If I understand, turn off data is not enough. It will be ok if I remove my sim card ???

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    Sven Erichsen

    Hi! Yes that's what helped in my case.
    The issue is still not solved by the way.

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    Olivier Pieret

    Thks.

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    Kevin Josling

    I'm now experiencing the same problem, after having no issues at all.

    The only thing which is different is the SIM card...previously it was on a cheap monthly contract, and I switched it over to a pay as you go SIM from the same network. Since then the elevation has been way off...

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    Cedric Martin

    Hello People, 

    Suffering from the exact same issue....as soon as I put a SIM in the device, I get crazy elevation data. I've contacted the support team earlier this summer and they were very positive that the fix would come in the next software release version. I didn't use a SIM for a  few weeks (lost it whe I removed it to test it for the support) so when I ordered a new one last week I thought this would be an old story. But it's exactly the same. 

    Openned another issue with the support and now the feedback is different: 

    - It's hard to fix, might not be doable in software only

    -they might need to change the hardware and replace the devices....this would take time....I'd bet we'd see a Karoo 3 before we see that....

    Hate to see that we have to choose between livetracking for security or proper elevation.....

    It's not good and super well managed from Hammerhead. I would truely like to understand if some of there hardware revison might work better than others or if that's the case on all devices...

    Anothe reason why they shoudl have a proper mobile app and do livetracking like the others do.....

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    Sven Erichsen

    Thanks for sharing your recent communication with the support. Well that's really disappointing.
    Having a SIM card in my K2 was one of the main reasons to get K2.

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    Grzegorz Ossolinski

    I have reported a problem with the indication of the slope. I found my Karoo2 to be crazy about the inclination value on bumps and uneven surfaces. I sent the .fit file and in response from HH I had the assurance that they would fix the problem in the next few update releases. We now have update 5 and it's on the same.
    It seems to be a hardware problem. Similar bad indications are given by the thermometer, so it would also be a hardware problem?
    Now I can't return Karoo2 to the store anymore because the time has passed, apparently I was left with some malfunctioning hardware.
    At the moment I have a problem with: wrong inclination indication, wrong summation of altitudes on the route, wrong temperature indication, incorrectly working route change function - no possibility to turn it off, wrong route marking for asphalt pavement - marks on gravel, a weak battery is really enough for 8 hours of driving .
    If HH it fixes it will be fine, if not in spring I will stay with my old Sigma Rox10

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    Jesús AC

    HI all.

    I have the same issue in my karoo 2 .

    Is there any update about this fix?

    I've noticed that the new field elevation left is working fine but the total elevation gain is working totaly wrong. (More than 500 m in last rides. ) :(

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