QT iOS BLE Issue
-
Anyone have any thoughts on why I would be getting this when using BLE on iOS?
[qt.bluetooth.ios] can not discover service details in the current state, QLowEnergyController::DiscoveredState is expected [CoreBluetooth] XPC connection invalidLatest iOS, latest XCode, latest Qt/QtCreator...
Source code in Creator, opening project in XCode and running on device. This used to work a couple months ago on 5.12... but not working on 5.14.
Ideas?
-
Hi,
I noticed similar behaviour on both ios and osx, I also upgraded to qt5.14.
It seems the QLowEnergyController::DiscoveredState comes when QLowEnergyController::discoveryFinished is emitted. My code discovered service details already in serviceDiscovered's handler, which seems caused the described scenario.In the slot attached to QLowEnergyController::serviceDiscovered I remember the discovered service uuids in vector of uuis like this
mServiceUUids.push_back(serviceUUid); // std::vector<QBluetoothUuid> mServiceUUids declared in header filethen in the slot attached to QLowEnergyController::discoveryFinished loop through the mServiceUUids and do service details discovery.
Seems to work for me even though it is more a workaround. I need to study what is the proper way to do it.
-
Yeah, this seems to be a workaround, but it works for me well enough to utilize in my project!
Thanks @VladoV , much appreciated!
The issue was resolved by https://codereview.qt-project.org/c/qt/qtconnectivity/+/313077. Thank you for pointing it out. In particular the workaround highlighted the problem.
