Characteristic Notify with acknowledgment aka. Indicate

Currently we only support classical notifications (without ack). As pointed out by one of our collegues some devices require indicate instead of notify. Indicate is notify with ack.

For Android use:

descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE)

instead of

descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE)

For iOS: The CoreBluetooth APIs in iOS don’t let you differentiate between notifications and indications; based on the peripheral’s GATT structure, it will simply use whichever type of data push method is available (notify or indicate). If the GATT structure has both notify and indicate enabled–which is very uncommon and probably shouldn’t be done–then iOS will use notify.

ToDo’s:

• Add indicate flag to CanUpdate in CharacteristicBase
• Android: set descriptor value to Indicate

[dweyermann]

@xabre We have implemented to request a connection parameter update from the BLE device with appropriate parameters. We have not observed any problems with notifications since then.

Thanks for your help and time!

[Dragon160]

Not yet - I’ll let you know