@Override
	public void onDataReceived(@NonNull final BluetoothDevice device, @NonNull final Data data) {
		super.onDataReceived(device, data);

		final Integer offset = readTimeZone(data, 0);
		if (offset == null) {
			onInvalidDataReceived(device, data);
			return;
		}

		if (offset == -128) {
			onUnknownTimeZoneReceived(device);
		} else if (offset < -48 || offset > 56) {
			onInvalidDataReceived(device, data);
		} else {
			onTimeZoneReceived(device, offset * 15);
		}
	}
Data callback that parses 1-byte value into a Time Zone offset.
If the value received is shorter than 1 byte the
{@link #onInvalidDataReceived(BluetoothDevice, Data)} callback will be called.
ble-common/src/main/java/no/nordicsemi/android/ble/common/callback/TimeZoneDataCallback.java