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iPhone 5s accelerometer/gyroscope/compass values incorrect

tharepairguy

macrumors member
Original poster
Mar 28, 2011
96
0
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
https://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 :)

http://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.
 
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richard371

macrumors 68030
Feb 1, 2008
2,953
1,090
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.
 
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wepiii

macrumors 6502a
Sep 22, 2012
526
117
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?
 
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Jesla

macrumors 6502a
Jan 7, 2013
541
170
Tennessee USA
As far the compasses all different, are they all set to true north or magnetic?

Mine 5S is off only 0.4*…….
 
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wepiii

macrumors 6502a
Sep 22, 2012
526
117
I have no idea honestly, where is that setting and what is the difference haha
 
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Irock619

macrumors 68000
Sep 16, 2011
1,772
275
San Francisco, CA
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?

View attachment 435932

Left iPhone 5S
Middle iPhone 5
Right iPhone 5

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

View attachment 435934

Anyone else experiencing this?

The compass is off on all phones because you have them all together. The magnetic field from the electronic components will throw it off.
 
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gym007

macrumors newbie
Sep 19, 2013
9
0
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?
 
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Mr. Buzzcut

macrumors 65816
Jul 25, 2011
1,037
487
Ohio
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.
 
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chrisvanhorn

macrumors regular
Jun 10, 2009
108
17
Kalamazoo, MI
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.
 
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iBighouse

macrumors 6502a
Mar 11, 2012
585
231
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.
 

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Jeff3f

macrumors member
Nov 12, 2010
77
6
Would be more valid if there were a leveled level tool in the frame too!
 
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gym007

macrumors newbie
Sep 19, 2013
9
0
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
 
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iBighouse

macrumors 6502a
Mar 11, 2012
585
231
I wonder why that other thread got closed. It seems that this is a widespread issue

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!
 
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tharepairguy

macrumors member
Original poster
Mar 28, 2011
96
0
Don't forget to do your duty and submit feedback to apple if your getting similar problems...
 
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asleep

macrumors 68040
Sep 26, 2007
3,590
1,505
I wonder why that other thread got closed. It seems that this is a widespread issue

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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