no QT log in this case. it is in my release mode. 

[2021-11-09T15:00:43.977+02:00][info   ][2e08 BTLE_QT_Factory] BIQ::connectToDevice:  "C8:63:A6:F6:E2:34" ,  QBluetoothLocalDevice::Unpaired
[2021-11-09T15:00:43.986+02:00][info   ][2e08 BTLE_QT_Factory] BIQ::onStateChanged    -  QLowEnergyController::ConnectingState
[2021-11-09T15:00:58.955+02:00][info   ][2e08 BTLE_QT_Factory] BIQ::disconnectDevice: controller->disconnectFromDevice  
[2021-11-09T15:00:58.955+02:00][info   ][2e08 BTLE_QT_Factory] BIQ::onStateChanged  "EPOCPLUS-4A2C0037"  -  QLowEnergyController::ClosingState
[2021-11-09T15:00:58.955+02:00][info   ][2e08 BTLE_QT_Factory] BIQ::onStateChanged  "EPOCPLUS-4A2C0037"  -  QLowEnergyController::UnconnectedState
[2021-11-09T15:00:58.955+02:00][info   ][2e08 BTLE_QT_Factory] BIQ::onControlerDisconnected