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  1. Qt
  2. QTBUG-102248

QBluetooth low energy discovering details on Windows cannot connect signals

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Details

    • Bug
    • Resolution: Duplicate
    • Not Evaluated
    • None
    • 5.15.8
    • Connectivity: Bluetooth
    • None
    • Windows

    Description

      Hello,
      When running QLowEnergyServices::discoverDetails, qt prints the following messages in the console:

      QObject::connect: Cannot queue arguments of type 'QHash<QLowEnergyHandle,QLowEnergyServicePrivate::CharData>'
QObject::connect: Cannot queue arguments of type 'QVector<QBluetoothUuid>'
QObject::connect: Cannot queue arguments of type 'QLowEnergyHandle'

      And the connection never completes.

      The solution I found is to add QT += bluetooth-private in the pro file, then

      #include "QtBluetooth/private/qlowenergyserviceprivate_p.h"
.....
    qRegisterMetaType<QHash<QLowEnergyHandle,QLowEnergyServicePrivate::CharData> >("QHash<QLowEnergyHandle,QLowEnergyServicePrivate::CharData>");
    qRegisterMetaType<QVector<QBluetoothUuid>>("QVector<QBluetoothUuid>");
    qRegisterMetaType<QLowEnergyHandle>("QLowEnergyHandle");

      And the the connection succeeds.

      On Android I don't have any issue, I have not tested Mac and Linux.

      Thanks,

      Philippe Lelong

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-99767 [5.15.7 -> 5.15.8] Bluetooth error: Make sure 'QHash<QLowEnergyHandle,QLowEnergyServicePrivate::CharData>' is registered using qRegisterMetaType()

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              ablasche Alex Blasche
              matirai Philippe
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              Dates

                Created:
                Updated:
                Resolved:

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