QBluetoothDeviceDiscoveryAgent - only discovery "active" LE devices, should not discover

Hi,

Once I have paired devices, the QBluetoothDeviceDiscoveryAgent always discovers these paired devices, although they are not powered and thus not sending advertisements.

So far I didn't find a method to find out if a BLE device discovered by the QBluetoothDeviceDiscoveryAgent is really present or not. I thought I could use the rSSi property but this seems to be cached. Using the connectToDevice function via the QLowEnergyController seems to be resource consuming/blocking   and not very effective, also after a number of tryouts the Unkown error occurs and things start to go really wrong. 

BTW is there a way to not cache data from remote devices? So far I didn't find anything useful on the internet....

Thanks for any help in advance!

Best regards,

Frank