iPhone 5s accelerometer/gyroscope/compass values incorrect

Discussion in 'iPhone' started by tharepairguy, Sep 24, 2013.

  1. tharepairguy, Sep 24, 2013
    Last edited: Oct 31, 2013

    tharepairguy
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    Mar 28, 2011
    #1
    Lined up against my apple box separating my iphone 4 and iphone 5s pointing directly south, here are the readings. I did this because the stainless steel band and/or other parts of the 4 were affecting the compass when lined up against each other. I might go over to a buddies and use his iphone 5 to take pics or video. Lets keep this thread civil and on track. Please present facts only. Trolls need not reply...

    There are now quite a few article's about this issue:
    http://www.cultofmac.com/247282/iphone-5s-compass-off-base/
    http://gizmodo.com/the-iphone-5s-motion-sensors-are-totally-screwed-up-1440286727
    http://www.macrumors.com/2013/10/03/calibration-on-iphone-5s-compass-and-level-appears-incorrect/
    http://9to5mac.com/2013/10/03/iphone-5s-sensors-providing-inaccurate-readings-for-some/
    http://venturebeat.com/2013/10/03/a...ed-up-and-so-are-the-games-that-rely-on-them/
    http://news.cnet.com/8301-13579_3-5...-motion-sensor-malfunction-may-be-widespread/
    http://www.forbes.com/sites/tonybradley/2013/10/04/apple-iphone-5s-sensors-are-jacked/

    Both Compass's set to magnetic north:
    iphone 5s reads: 165s
    iphone 4 reads: 179s <--- Reads correctly compared to the compass in my cessna

    Swipe from right to left to get Apples level app:
    iphone 5s reads: -4 degrees
    iphone 4 via iHandy level reads: 0 degrees level
    2 different Johnson levels used as well. 24" and 48". I had to raise the level until the bubble bottomed out in the glass to make the iphone 5s read zero.

    Have you tested this? I have contacted apple support and they suggested replacing the phone. At this point, I'm going to wait it out as I can live with this defect until I know the problem has been fixed. I spent 34.99 oh a front and rear film protector that I will have to eat when/if the device gets replaced. OCD does not alloy me to use any device naked. What are your results? good or bad...

    If yours it out of spec. I suggest reporting this to apple directly to get this problem resolved quicker. They said that they are monitoring feedback in real-time, at this time :)

    www.apple.com/feedback

    Ok so that calibration procedure had no effect on the invalid data from the senors. 7.0.2 update had no positive effect as well. Sensor-Gate is still lurking...

    7.0.3 seems to have corrected the problem for a lot of people.
     
  2. AceMason
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  3. doctorandrew
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    #3
    So people should just keep this problem to themselves since the other thread closed down?
     
  4. AceMason
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    #4
    lol no I was actually curious why it closed because I contributed to that thread.
     
  5. user-name-here
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  6. richard371
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    macrumors 65816

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    #6
    The other thread was shut down because of a certain user or 2 that was derailing it. This is a clear problem affects gameplay for games and apps that use the accelerometer. Xplane for instance the plane drifts to the right big time on my device. Plus or minus 1 is of for allowable tolerances but not 4, 5, or 6 many of us are getting. Don't let someone tell you its OCD and is acceptable its not at least for people who use this function.
     
  7. wepiii
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    #7
    iPhone 5S Gyro issues

    I posted this in another thread and a mod immediately closed the thread for some reason unknown to me. Is anyone else's gyro not working correctly on their 5S?

    ImageUploadedByTapatalk1380062563.755992.jpg

    Left iPhone 5S
    Middle iPhone 5
    Right iPhone 5

    Also, this is really weird... None of the compasses are reporting the same direction.

    ImageUploadedByTapatalk1380062633.128370.jpg

    Anyone else experiencing this?
     
  8. Jesla
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    Jesla

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    Tennessee USA
    #8
    As far the compasses all different, are they all set to true north or magnetic?

    Mine 5S is off only 0.4*…….
     
  9. wepiii
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    #9
    I have no idea honestly, where is that setting and what is the difference haha
     
  10. Irock619
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    Irock619

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    #10
    The compass is off on all phones because you have them all together. The magnetic field from the electronic components will throw it off.
     
  11. gym007
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    Sep 19, 2013
    #11
    5S accelerometer is messed up

    Mine is 4 degrees off on the tilt function and the compass is also slightly off. Anyone else having this problem?
     
  12. gentlefury
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  13. Mr. Buzzcut
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    Mr. Buzzcut

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    #13
    Yep. Just got mine today and same deal with the orientation. I have to lift the corner for it to zero out. This is on a known level surface.
     
  14. wepiii
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  15. Jesla
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    Jesla

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    #15
    Yup, it must be because mine is of only 0.4*…….
     
  16. chrisvanhorn
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    chrisvanhorn

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    #16
    The 5S might actually be more accurate due to the M7, which means the iPhone 5 devices could possibly be showing an incorrect reading. Just a thought.
     
  17. iBighouse, Sep 24, 2013
    Last edited: Sep 24, 2013

    iBighouse
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    iBighouse

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    #17
    I can just visually see that mine is also in error. I guess if could give some numbers to back that up if needed. My 4s was very accurate. This level seems sloppy and loose. It does make me wonder two things:

    1. Since the new M7 motion chip has a lot to do with running numbers for rhe gyro, might bad data in from a gyro that's off by significant amounts result in bad numbers on the output side?

    2. Is this a software issue and easily fixable, or is this a hardware issue that might not be so easily fixed?

    Update: I leveled it against a Stabila smart level. Seems it's off by 4 degrees. That's unacceptable and a significant amount- especially in light of this phone being touted as such a motion device.
     

    Attached Files:

  18. Jeff3f
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    #18
    Would be more valid if there were a leveled level tool in the frame too!
     
  19. gym007
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    #19
    Because when I place it on a flat surface it's always 4 degrees off

    My 4S with ios7 was accurate
     
  20. i0Nic
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    #20
    Are you also seeing a jittery/jump effect when you unlock the phone? As per this thread - http://forums.macrumors.com/showthread.php?t=1643977

    Could be a software/hardware issue with the motion sensors.

    I'm also seeing the same thing as you with the gyro being a bit off.
     
  21. gym007
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    #21
    Yes, as mentioned in my thread it's about 4 degrees off level

    I wonder why that other thread got closed. It seems that this is a widespread issue
     
  22. iBighouse
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    iBighouse

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    #22
    Dunno why it was so suddenly closed. Apparently It went "off the tracks" so let's try to keep this thread on the tracks!

    I went to apple.com/feedback and submitted it as a bug item. Maybe if others do likewise we can spur a fix for it!
     
  23. tharepairguy, Sep 24, 2013
    Last edited: Sep 25, 2013

    tharepairguy
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    #23
    Don't forget to do your duty and submit feedback to apple if your getting similar problems...
     
  24. fedecape
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  25. asleep
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    asleep

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    #25
    Mods will close a duplicate topic, or sometimes merge topics. So if you get locked, search for an existing thread on same subject.
     

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