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Thread: A500 compass

  1. #11
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    Quote Originally Posted by Dusto View Post
    Same problem here. My guess is during testing/development while working without actual hardware some dev hard coded to add 10 to the sensor value so debugging could be performed with values other than 0 and it never got taken out.
    You're right, it does look like the z component is simply having 10 added to it. Upside down it reads 0.2 when it should be -9.8. This smells an awful lot like an extremely embarrassing one line goof that Acer really needs to fix yesterday.

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  3. #12
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    It looks like the update fixes the accelerometer being off, but the compass is still off by 90 degrees. Am I the only one still having this issue? I took a little closer look at the output of androsensors and compared it to my phone, based on the magnetic field numbers compared to the orientation numbers either the ecompass was installed 90 degrees off or the driver is incorrect. Given not everyone has this issue I'm guessing a batch of units have the hardware installed wrong.

    Sent from my T-Mobile G2 using Android Tablet Forum

  4. #13
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    Where is this compass app you folks are discussing?

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    Quote Originally Posted by AQ_OC View Post
    Where is this compass app you folks are discussing?
    Take your pick: https://market.android.com/search?q=compass&so=1&c=apps

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    Quote Originally Posted by Icebike View Post
    Thanks. I thought folks were talking about an app that came installed on the a500.

  7. #16
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    Quote Originally Posted by Dusto View Post
    It looks like the update fixes the accelerometer being off
    That's excellent news, thanks! Now if only Acer would push an update to us emea_gen3 owners :-/

    Quote Originally Posted by Dusto View Post
    but the compass is still off by 90 degrees.
    :-( If it's consistently off by 90 degrees, it should be fixable in software, even if the hardware was installed wrong. I don't know what the magnetic field sensor looks like (how it's packaged) but I think it sounds unlikely that it could be installed wrong. For instance a square chip with pins on all edges is highly unlikely to function at all if rotated 90 degrees.

  8. #17
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    Quote Originally Posted by csoren View Post
    If it's consistently off by 90 degrees, it should be fixable in software, even if the hardware was installed wrong.
    I finally had an update for mine. Compass is now perfect here, so maybe yours IS installed wrong, who knows.
    Last edited by csoren; 05-27-2011 at 04:57 AM. Reason: Formatting

  9. #18
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    Quote Originally Posted by csoren View Post
    I finally had an update for mine. Compass is now perfect here, so maybe yours IS installed wrong, who knows.
    Can you link to your compass app that's working correctly now after the update?
    My compass app (https://market.android.com/details?i...ftware.compass) is still off by -90 deg even after the firmware update from Acer.
    Rooted Nook Color- Ultimate Droid @ 925Mhz (*****) Keeper!
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  10. #19
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    Quote Originally Posted by robdroid View Post
    Can you link to your compass app that's working correctly now after the update?
    My compass app (https://market.android.com/details?i...ftware.compass) is still off by -90 deg even after the firmware update from Acer.
    Hmm I see what you mean. By "compass" I meant the orientation sensor. This sensor now works perfectly in Google Sky Map, Maps and Street View. The compass app you're linking to is indeed off by 90 degrees. I suspect this is because the natural orientation of the device is 90 degrees offset from what a phone normally is. There's an article on the Android Developer Blog talking about this exact problem and how to code around it. Android Developers Blog: One Screen Turn Deserves Another

    In short, I think it's a bug in the compass app. If the Google apps work fine (as they do here), don't worry about it.

  11. #20
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    Quote Originally Posted by csoren View Post
    Hmm I see what you mean. By "compass" I meant the orientation sensor. This sensor now works perfectly in Google Sky Map, Maps and Street View. The compass app you're linking to is indeed off by 90 degrees. I suspect this is because the natural orientation of the device is 90 degrees offset from what a phone normally is. There's an article on the Android Developer Blog talking about this exact problem and how to code around it. Android Developers Blog: One Screen Turn Deserves Another

    In short, I think it's a bug in the compass app. If the Google apps work fine (as they do here), don't worry about it.
    Yeah, your explanation makes sense. The real nav apps and GPS test, and Google Sky all indicate north properly- as you said- the compass apps were probably written for a phone and they're oriented differently than the tablets.
    Nice job!
    Rooted Nook Color- Ultimate Droid @ 925Mhz (*****) Keeper!
    Acer A500 rooted! (*****) Keeper!
    Craig CMP 738a (for $70 it's good enough!)
    Coby MID 7024 returned- defective audio circuit
    Galaxy Tab 7"- returned- too expensive for 7" tablet
    Huawei Ideos S7- returned- bricked after 3 days use


 
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