Qt 6 is a result of the conscious effort to make the framework more efficient and easy to use.
We try to maintain binary and source compatibility for all the public APIs in each release. But some changes were inevitable in an effort to make Qt a better framework.
In this topic we summarize those changes in QtBluetooth, and provide guidance to handle them.
The enums QBluetooth::Security and QBluetooth::AttAccessConstraint have been changed to a scoped enums for improved type safety.
QBluetoothDeviceDiscoveryAgent::inquiryType property and related setter/getter & enum were removed. The API element was never implemented and/or supported.
The pairing agent related API was removed without replacement. This includes pairingConfirmation(bool), pairingDisplayPinCode(..) & pairingDisplayConfirmation(..). Except for Android and BlueZ 4 there was never an implementation for it. Bluez 4 support was removed in Qt 6 and Android's implementation required unobtainable BLUETOOTH_PRIVILEGED for at least parts of the code.
Renamed ServiceState enum values:
This change happens in anticipation that service discovery might become an optional step in the future.
enums ProtocolUuid, ServiceClassUuid, CharacteristicType, and DescriptorType are now scoped enums. The usage of enum items has to be adapted in user code.
The handle() method is no longer part of the public Bluetooth LE interfaces. It's purpose as identifier for descriptors was replaced. The QLowEnergyDescriptor instances itself serve as identifier.
QBluetoothTransferManager, QBluetoothTransferRequest, and QBluetoothTransferReply have been removed without replacement.
QBluetoothSocket::SocketState and QBluetoothSocket::SocketError are now scoped enums. The usage of enum items has to be adapted in user code.
The QML interface has been removed because socket programming via QML is not advisable. QDeclarativeBluetoothService, QDeclarativeBluetoothSocket, and QDeclarativeBluetoothDiscoveryModel (in QML: BluetoothService, BluetoothSocket, and BluetoothDiscoveryModel) have been removed without replacement.
The "error" signals in QBluetoothDeviceDiscoveryAgent, QBluetoothLocalDevice, QBluetoothServer, QBluetoothServiceDiscoveryAgent, QBluetoothSocket, QLowEnergyController, and QLowEnergyService have been renamed to "errorOccurred" to remove ambiguities between the "error" signal and the "error" getter.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-6.2/qtbluetooth-changes-qt6.html