Hackbod was right, the compass will calibrate itself ( I am not sure if a program has to be accessing it at the time or not).
My compass was way out of cal when I got the phone, and the following worked: Run orienteer program or street view. Spin the G1 slowly but steadily in your hands for about 10 seconds. The compass should compensate for static fields in the area and calibrate. It probably helps to spin through all three axes (x,y,z or side-side, front-back, and up-down). Try rolling the phone in your hand a few times, and end-over-end a few times. I don't know about the G1 sensor, but this was how I would cal other digital compasses (google honeywell hmr 3200 for an example digital compass). I have a magnetic case, and occassionally I have to recal it if I want to use the compass. Personally, I don't see what tapping the G1 would do, I believe it is all solid-state (no moving parts to get stuck). In my experience, the solution is just getting the sensors to have a decent sampling of field strength. There shouldn't be a whole lot of ferrous (magnetic) material in the phone, so I don't imagine any serious longterm effects from magnets (short term exposure to a large field may throw off gain on internal circuits preventing proper detection of the relatively small field from the Earth). Here is Honeywell's compass site: http://www.magneticsensors.com/landnav.html I guess you could always insert some mu-metal in holster between the phone and the magnet. http://en.wikipedia.org/wiki/Mu-metal I can't speak to the effectiveness, but this is the type of situation it is intended for. On Nov 12, 9:13 pm, hamody <[EMAIL PROTECTED]> wrote: > On Nov 5, 4:29 am, mitush <[EMAIL PROTECTED]> wrote:> In the process of > writing an app for my G1 I think I got stuck with > > similar problem. Running Orienteer application (from the Market) > > confirms that; turning my G1 by 360 degrees while holding it flat, the > > reading on the Orienteercompassgoes between 0 and 90 degrees only. > > The same thing happens when usingcompassview with the maps/street > > view, here I could only get about 90 degrees view angle as well (in > > other words I cannot see other side of the street and other direction > > of the street). > > hi mitush > > I has the same problem with you.When usecompassin street-view ,only > 0/90 angle view show. > It is worse than iphone's 3-axis accelerometer,right? > > > > > The funny thing is that, in my G1 app I was listening and logging > > SensorManager.SENSOR_ORIENTATION_RAW values and earlier today the > > returned values had the range of 360 degrees, and I have the log file > > to prove it was not a dream :) When I run the same app now, it shows > > limited range values only, consistent with Orienteer . As if something > > got broken between now and few hours ago. I also recall that when I > > triedcompass/map/streetview few days ago, I was able to rotate my > > view without any constraints. > > > There is not much metal around, I tried changing my location as well. > > For a second, I though it could be the car, which my wife parked > > outside the house an hour ago, but Orienteer shows the same problem > > even 120 ft away in the backyard. I did not drop G1 or did anything of > > that sort. > > > On Nov 4, 4:01 am, bryan <[EMAIL PROTECTED]> wrote:> I've been trying to > > figure out the cause of acompassrelated error > > > for a while. After debugging and standing out in the rain slowly > > > spinning in circles for a while, I finally found out that my device is > > > reporting back yaw values inconsistently. > > > > For example, the range of offset from magnetic north is +/- 46 > > > degrees. The average offset is just under 20 degrees. Depending on how > > > I orient my G1, the error can go to 46 degrees off of magnetic north. > > > Has anyone here experienced similar results when reading yaw from the > > > sensor? I've gotten a number of reports from others complaining about > > > inaccuracy withcompasstype results and am wondering if this is a per > > > phone error or if all of the G1s have poor yaw/orientation sensors. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
