// switch to receiving notifications after initial characteristic read
mBluetoothGatt.setCharacteristicNotification(characteristic, true);
+ // Use writeType that requests acknowledgement.
+ // This improves compatibility with various BLE-MIDI devices.
+ int originalWriteType = characteristic.getWriteType();
+ characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
+
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
CLIENT_CHARACTERISTIC_CONFIG);
if (descriptor != null) {
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
- mBluetoothGatt.writeDescriptor(descriptor);
+ boolean result = mBluetoothGatt.writeDescriptor(descriptor);
+ Log.d(TAG, "writeDescriptor returned " + result);
} else {
Log.e(TAG, "No CLIENT_CHARACTERISTIC_CONFIG for device " + mBluetoothDevice);
}
+
+ characteristic.setWriteType(originalWriteType);
}
@Override