goatstone/androidsensorfusion

Get, fuse and display sensor information for Android.

AndroidSensorFusion
com.goatstone.util.SensorFusion

Get, fuse and display sensor information for Android.

Usage:

private SensorFusion sensorFusion;
sensorFusion = new SensorFusion();
sensorFusion.setMode(SensorFusion.Mode.ACC_MAG);

double azimuthValue = sensorFusion.getAzimuth();
double rollValue =  sensorFusion.getRoll();
double pitchValue =  sensorFusion.getPitch();

androidsensorfusion's Issues

Serious bug that prevents gyroscope data from being included

private float timestamp;

The above declaration is faulty. It should be declared as a long.

It being declared as a float prevents any gyroscope rotation from being calculated, because the time interval between two timestamps is generally not within the precision capability of a float variable. Hence dT is always calculated as zero. Hence the rotation vector calculated from gyro is always (0, 0, 0).

Using GYRO mode with device without magnetometer

Hello
Thanks for you great work.

When I try to use your lib in GYRO mode with the device without magnetometer it work well till I move my device, once I stop moving my device values of Azimuth, Roll and Pitch start moving toward zero and finally end up with settling at value 0.

Actually I'm drawing a cursor over my application using sensor movement with the help of your lib. I'm normalizing Azimuth and Roll values and computing the exact X and Y coordinates to draw the cursor.

Can you please help me to prevent the values from becoming zero after device become steady.

You can replicate my issue on device with magnetometer by disabling magnetometer sensor.

Thanks