HMC5883L driver for Android Things

This driver include 3-axis magnetometer. There is no warranty for this driver. NOT USE IN PRODUCTION!!

How to use the driver

Sample usage

Manual usage

import com.cacaosd.android.things.contrib.driver.hmc5883l;
// Access the environmental sensor:
HMC5883L hmcl5883l;
try {
    hmcl5883l = new HMC5883L(i2cBusName);
    hmcl5883l.setSamplesAvarage(SAMPLES_AVARAGE_8);
    hmcl5883l.setOutputRate(OUTPUT_RATE_4);
    hmcl5883l.setMeasurementMode(MEASUREMENT_NORMAL);
    hmcl5883l.setMeasurementGain(GAIN_1090);
    hmcl5883l.setOperationMode(OPERATION_MODE_CONT);
} catch (IOException e) {
    // error.
}
try {
    float[] magnitudes = hmcl5883l.getMagnitudes();
} catch (IOException e) {
    // error reading
}
try {
    hmcl5883l.close();
} catch (IOException e) {
    // error closing sensor
}

You can register Android Sensor Service like this.

SensorManager mSensorManager = getSystemService(Context.SENSOR_SERVICE);
SensorEventListener mListener = ...;
HMC5883LSensorDriver mSensorDriver;
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        mSensorManager.registerDynamicSensorCallback(new SensorManager.DynamicSensorCallback() {
            @Override
            public void onDynamicSensorConnected(Sensor sensor) {
                if (sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
                    mSensorManager.registerListener(MagnetometerActivity.this,
                            sensor, SensorManager.SENSOR_DELAY_NORMAL);
                }
            }
        });
        try {
            mSensorDriver = new HMC5883LSensorDriver(BoardDefaults.getI2CPort());
            mSensorDriver.registerMagmetormeterSensor();
        } catch (IOException e) {
            Log.e(TAG, "Error configuring sensor", e);
        }
    }
if (mSensorDriver != null) {
    mSensorManager.unregisterListener(this);
    mSensorDriver.unregisterMagmetormeterSensor();
    try {
        mSensorDriver.close();
    } catch (IOException e) {
        Log.e(TAG, "Error closing sensor", e);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        mSensorDriver = null;
    }
}

License

  Copyright 2016 Cagdas Caglak
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.