Hi Scott, the general process in Qt 6 is as Juha has described. You need to call QBluetoothLocalDevice::requestPairing() with the desired pairing mode, and then handle the QBLD::pairingFinished() signal. Also QBLD::errorOccurred() might report PairingError in case something goes wrong.
Last time I checked, pairing worked fine on Windows 11. The system dialog with PIN confirmation should appear automatically, you do not need to handle it somehow on the Qt side. But I must admit that, like everything in Bluetooth, it depends both on your local bluetooth adapter, and the device that you try to connect to. Feel free to create a bugreport with a more detailed description! Best regards, Ivan ________________________________________ From: Interest <interest-boun...@qt-project.org> on behalf of Scott Bloom <sc...@towel42.com> Sent: Thursday, April 10, 2025 7:07 AM To: Juha Vuolle Cc: Interest@qt-project.org Subject: Re: [Interest] QBluetooth connection/pairing issue Thanks for the hint.. Its close. But not quite there. In Qt5, there were 2 or 3 call back signals for handling authentication, and one slot to be called when finished. Those are missing in Qt6, and I don’t see anyway to set the pin for an authorized connection. Scott -----Original Message----- From: Juha Vuolle <juvuo...@gmail.com> Sent: Tuesday, April 8, 2025 23:09 To: Scott Bloom <sc...@towel42.com> Cc: Interest@qt-project.org Subject: Re: [Interest] QBluetooth connection/pairing issue Hi, > It works fine, if I have paired it outside of the app. How do I pair it > inside the app? QBluetoothLocalDevice might be useful for you, see https://doc.qt.io/qt-6/qbluetoothlocaldevice.html#requestPairing On Wed, 9 Apr 2025 at 05:22, Scott Bloom <sc...@towel42.com> wrote: > > I am working on a tool that connects to a BT serial port device on > windows 11 > > > > I have the scan working, and can select the device, giving me a > QBluetoothServiceInfo > > > > I can get the address via QBluetoothServiceInfo::device().address(); > > > > I can save this value to the registry, and reconnect on the startup of the > tool. > > > > However, I can’t figure out for the life of me how to “pair” the device. > > > > I turned on all the Bluetooth logging, hoping to see something, via > > QLoggingCategory::setFilterRules( QStringLiteral( "qt.bluetooth* = > true" ) ); > > > > But that didn’t help. > > > > I construct the socket via > > socket = new QBluetoothSocket( QBluetoothServiceInfo::RfcommProtocol); > > > > I connect to all the socket signals, and never see a request or failure due > to not being paired. > > > > I then use > > > > Socket->connectToService( address, > Socket->QBluetoothUuid::ServiceClassUuid::SerialPort ) > > > > It works fine, if I have paired it outside of the app. How do I pair it > inside the app? > > TIA, > > > Scott > > > > > > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
