No notification when characteristic is written

Hello,

I'm not sure if this is really an issue or if I just misuse/misunderstand the Qt bluetooth layer.

The use case is the following:

I have a BLE peripheral communicating with a BLE controller over two characteristics (one WRITE, one INDICATE).

When using Qt to write to the INDICATE characteristic on the peripheral side some data longer than the MTU, I split the buffer into several smaller buffers, and call repeatedly QLowEnergyService::writeCharacteristic()
The problem with this approach is that I have no way to know that the data were read by the central before writing the next buffer.

Doing the same thing on android, there is a callback onNotificationSent that can be used to know when the next buffer can be sent.

I'm attaching a patch I wrote to be notified, but I strongly doubt that this is the good approach.