I made Qt application which collects data from sensors (accelerometer, magnetometer, proximity, compass, GPS...). I have used application on N8 and it works perfecly on Anna devices. However, there seems to be problem with Belle. It works fine at start (from 5 to 60 minutes) but in some point magnetometers and compass seem to freeze, and I do not get updates their values. This problem seems to be related with Belle because it works fine on Anna and I've tested the application with two different N8 phones running Belle. Is there some solution to this problem?
Um... as far as I can I can remember, in Nokia Suite I wanted to update all maps to their latest versions.
Nokia Suite's support for that isn't very well thought out, in the sense that you have to replace all maps currently on the phone - View > Go to > Maps > Updates available > Update the maps. This then replaces all maps.
I might also first have gone View > Go to > Maps > On phone > Maps and voice guidance to see what's one the phone.
Be that as it may, when I got to whichever of the above, Nokia Suite mentioned something about the Maps application on the phone not being in the correct state and advised that I should restart Maps (on the phone) so that it could "reset" itself if I remember correctly. Thereafter the problem was gone.
So you could try both the above and look for any prompts or suggestions from Nokia Suite. Failing that, also restart Maps on the phone and failing that, perhaps reinstallating Maps?
You can also update the maps data via Wi-Fi on your device itself. I find this is a much more stable installation and less confusing that performing the update via Nokia Suite. Simply goto Maps, then press the /// icon to the far right on screen and select Map Loader. Also, to ensure you have the latest version of the Maps, Drive and associated applications, by downloading the Nokia Maps Suite 2.0 application in Nokia Store. This will automate the installation of all the Maps applications onto your phone.