Bluetooth connection to Headset/BT Controller

[KaiM]

Hello,

my knowledge on bluetooth conncetions is somewhat limited.
I am trying to control my application (on linux) via commands from bluetooth devices, which could be, for example, a bluetooth presenter or buttons on a headset.

Is there a way to establish a BT connection and read out data without implementing the client side with QBluetooth?

Thank you in advance

[KaiM]

Maybe I should add: I have already looked at Qts Heatrate game example, but that is based on BT LE. I would however like to receive from non LE peripherals.