IssueTracker

Frequency of sensors are unstable from 0 Hz up to 50 Hz

Start sensors:
SensorManager mSensorManager = null;

mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

int acc_sensorType = Sensor.TYPE_ACCELEROMETER;
int gyr_sensorType = Sensor.TYPE_GYROSCOPE;

Sensor acc_sensor = mSensorManager.getDefaultSensor(acc_sensorType);
Sensor gyr_sensor = mSensorManager.getDefaultSensor(gyr_sensorType);

mSensorManager.registerListener(this, acc_sensor, 1000000/Configuration.sampling_rate, SensorManager.SENSOR_DELAY_NORMAL);
mSensorManager.registerListener(this, gyr_sensor, 1000000/Configuration.sampling_rate, SensorManager.SENSOR_DELAY_NORMAL);

Read sensors data:
@Override
    public void onSensorChanged(SensorEvent event) {
        SensorDataSaver.saveSensorEvent(event.sensor,
                System.currentTimeMillis(),
                event.values[0], event.values[1], event.values[2]);


Save sensor data
(Using implementation 'commons-io:commons-io:2.6' - import org.apache.commons.io.FileUtils;)
if (sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
    saveSensorData(accFile, timestamp, x, y, z);
} else {
    saveSensorData(gyrFile, timestamp, x, y, z);