Compass on linux mobile #103

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1. janbar commented on May 25, 2025

   

   janbar

   on May 25, 2025

   Last edited by janbar

   Owner

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   The app uses the Qt framework and its positioning and sensor modules. Therefore it should work if you have installed the requirements it needs.

   The app gathers magnetic and accel data to compute the current orientation. I guess geoclue doesn't provide these data.
2. magdesign commented on Jul 27, 2026

   

   magdesign

   on Jul 27, 2026

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   in osmin v.1.15.1 the compass still does not work under linuxmobile.
   when running monitor-sensor i get realtime compass data. question is:
   how can we pipe this info to osmin?

   its available via dbus

   ~
   ~ $ gdbus introspect \
   >   --system \
   >   --dest net.hadess.SensorProxy \
   >   --object-path /net/hadess/SensorProxy
   node /net/hadess/SensorProxy {
     interface org.freedesktop.DBus.Properties {
       methods:
         Get(in  s interface_name,
             in  s property_name,
             out v value);
         GetAll(in  s interface_name,
                out a{sv} properties);
         Set(in  s interface_name,
             in  s property_name,
             in  v value);
       signals:
         PropertiesChanged(s interface_name,
                           a{sv} changed_properties,
                           as invalidated_properties);
       properties:
     };
     interface org.freedesktop.DBus.Introspectable {
       methods:
         Introspect(out s xml_data);
   NAME                                TYPE      SIG
   net.hadess.SensorProxy.Compass      interface -  
   .ClaimCompass                       method    -  
   .ReleaseCompass                     method    -  
   .CompassHeading                     property  d  
   .HasCompass                         property  b  
   org.freedesktop.DBus.Introspectable interface -  
   .Introspect                         method    -  
   org.freedesktop.DBus.Peer           interface -  
   .GetMachineId                       method    -  
   .Ping                               method    -  
   org.freedesktop.DBus.Properties     interface -  
   .Get                                method    ss 
   .GetAll                             method    s  
   .Set                                method    ssv
   .PropertiesChanged                  signal    sa{
   
3. magdesign commented on Jul 28, 2026

   

   magdesign

   on Jul 28, 2026

   Last edited by magdesign

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   on the way to trail it down, i note my findings here:

   looking at the genericcompass.cpp file, it depends on:

   QAccelerometer
   QMagnetometer
   QCompass
   

   after testing with a little tool, i get compass data via

   QCompass
   

   so i guess there is something wrong with the logic if no magnetometer exists