Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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5.6.3, 5.15.0, 6.2.2
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None
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Ubuntu 20.04, Ubuntu 22.04, Bluez 5
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Linux/X11
Description
I am trying to connect to a BLE gadget which QLowEnergyController::connectToDevice, but I got the following error:
qt.bluetooth.bluez: QLowEnergyControllerPrivateBluezDBus::connectToDevice() qt.bluetooth.bluez: Cannot find targeted remote device. Re-running device discovery might help
Here is more output which could be relevant:
mm@lapos:~/Projektek/jolla/sailfish-ble-rc/desktop/build-ble_rc-Desktop_Qt_6_2_2_GCC_64bit-Debug$ ./ble_rc QML debugging is enabled. Only use this in a safe environment. qt.bluetooth.bluez: Bluez 5 detected. qt.bluetooth.bluez: Creating QtBluezDiscoveryManager qt.bluetooth.bluez: Discovered: "SL-488 Challenge Evo" "0A:C0:31:44:F6:5E" Num UUIDs 1 total device 0 cached RSSI 0 Num ManufacturerData 0 qt.bluetooth.bluez: Updating RSSI for "0A:C0:31:44:F6:5E" QVariant(short, -34) qt.bluetooth.bluez: Detecting bluetoothd version qt.bluetooth.bluez: Using /proc/<pid>/exe qt.bluetooth.bluez: Using /proc/<pid>/cmdline qt.bluetooth.bluez: Detected bluetoothd version 5.53 qt.bluetooth.bluez: Bluetoothd: "5.53" qt.bluetooth: Using BlueZ LE DBus API qt.bluetooth.bluez: QLowEnergyControllerPrivateBluezDBus::connectToDevice() qt.bluetooth.bluez: Cannot find targeted remote device. Re-running device discovery might help
- Re-running the discovery does not help.
- Got same results with Qt 5.15.0
- The gadget itself is capable to be connected, it works under Android with its specific app.
- I can connect to the gadget with gatttool with the same setup (same adapter, same machine)
- The same code also works (at least the connection made successfully) on device running Sailfish OS with an ancient Qt 5.6.3. (I am not sure if that version uses the Bluez DBUS API as well.)
- The lowenergyscanner example fails to connect with the same error
- Fails with public or random address as well
- I can connect to the device with gatttool and I can write the characteristics/get the notifications correctly
Attachments
Issue Links
- mentioned in
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