.. highlight:: java

I2C
===

The `I2C <https://mbientlab.com/docs/metawear/android/2/com/mbientlab/metawear/module/I2C.html>`_ class allows you to communicate with any I2C sensors on the board.  Reading and writing data is done with the `readData <https://mbientlab.com/docs/metawear/android/2/com/mbientlab/metawear/module/I2C.html#readData(byte,%20byte,%20byte)>`_ and `writeData <https://mbientlab.com/docs/metawear/android/2/com/mbientlab/metawear/module/I2C.html#writeData(byte,%20byte,%20byte[])>`_ methods.  Unlike other sensors, the I2C module directly returns the data to the user in an AsyncOperation object rather than routing the data through a data route.

::

    import com.mbientlab.metawear.module.I2C;
    
    // On MetaWear R boards, this reads the WHO_AM_I register from the accelerometer
    I2C i2cModule= mwBoard.getModule(I2C.class);
    i2cModule.readData((byte) 0x1c, (byte) 0xd, (byte) 1).onComplete(new CompletionHandler<byte[]>() {
        @Override
        public void success(byte[] result) {
            Log.i("MainActivity", String.format("WHO_AM_I= %d", result[0]));
        }
    });