QML Accelerometer is always (useless) dummy.accelerometer

[Jonathan Booth]

Tested on gnex, nex4 phones. Using QML to create the Accelerometer, the identified device is "dummy.accelerometer" and it returns no useful data (static x:0, y:g (aka 9.81m/s), z:0).

Snippet:

            Row {
                Label {
                    text: "Accel: "
                    fontSize: "large"
                }
                Label {
                    id: sensor
                    text: "..."
                    fontSize: "large"
                }
            }
            Accelerometer {
                id: accel
                onReadingChanged: { sensor.text = accel.identifier; stop() }
                active: true
            }

[Lorn Potter (lorn-potter)]

The dummy sensor plugin is useless by design, and emulates what an accelerometer would be like in a desktop computer.

Noted from source code:
   // Your average desktop computer doesn't move :)

It could probably be changed to provide some easy sine wave data, but I am not sure it's worth it.

Also note from the initial commit message (in qtmobility):

    Generic is for things like "orientation based on accelerometer".
    Dummy is for things like "give me an accelerometer on my desktop for testing".

[Lorn Potter (lorn-potter)]

This actually might be a packaging issue, if the device does not get a real /etc/xdg/QtProject/Sensors.conf that tells QtSensors to use the dummy sensor backend.

Bug is 3 years old, so I assume it has been fixed.