Find bluetooth device

[Mihaill]

Hi!
I use Windows 10, Qt 6.2.
I wont find bluetooth device, but cand do this. Programm not see devices.

#ifndef APPCORE_H
#define APPCORE_H

#include <QObject>
#include <QDebug>
#include <QJSEngine>
#include <QQmlEngine>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#include <QBluetoothLocalDevice>
#include <QBluetoothDeviceDiscoveryAgent>
#include <QBluetoothDeviceInfo>
#include <QBluetoothSocket>

class AppCore: public QObject
{
    Q_OBJECT
public:
    AppCore();
    ~AppCore();

public slots:
    void startAppCore();
    void getAvailableBluetooth();

private:
    QBluetoothDeviceDiscoveryAgent * m_bluetoothAgent = new QBluetoothDeviceDiscoveryAgent;
    QBluetoothSocket *m_bluetoothSocket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);

private slots:
    void onBluetoothDeviceDiscovered(const QBluetoothDeviceInfo &info);
};

static QObject *singeltonProvider(QQmlEngine *engine, QJSEngine *scriptEngine)
{
    Q_UNUSED(engine);
    Q_UNUSED(scriptEngine);

    AppCore *appCore=new AppCore();
    return appCore;
}

#endif // APPCORE_H

#include "appcore.h"

AppCore::AppCore()
{
    connect(m_bluetoothAgent, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered, this, &AppCore::onBluetoothDeviceDiscovered);
    m_bluetoothAgent->start();
}

AppCore::~AppCore()
{

}

void AppCore::startAppCore()
{

}

void AppCore::getAvailableBluetooth()
{

}

void AppCore::onBluetoothDeviceDiscovered(const QBluetoothDeviceInfo &info)
{
    qDebug()<<"11111111111111111111111";
    qDebug()<<info.name()<<info.address();
}

[JonB]

@Mihaill

• Your code as shown has no call to free function singeltonProvider(). Does it even get called?

• You might check QBluetoothDeviceDiscoveryAgent::DiscoveryMethods QBluetoothDeviceDiscoveryAgent::supportedDiscoveryMethods() to make sure that it can do any BT discovery at all.

• You say you are Windows but do not mention compiler? From Changes to Qt Bluetooth:

Win32 backend has been removed. There will not be a working Bluetooth backend when Qt is built with mingw.

?

[Mihaill]

@JonB said in Find bluetooth device:
I use singeltonProvider() in main.cpp
I use MinGw 64 bit qt 6.2.3
QBluetoothDeviceDiscoveryAgent::supportedDiscoveryMethods() return

QFlags<QBluetoothDeviceDiscoveryAgent::DiscoveryMethod>(NoMethod)

And programm said

qt.bluetooth: Dummy backend running. Qt Bluetooth module is non-functional.

[JonB]

@Mihaill
Exactly! That is why it is worth checking these things. So since your are mingw you have your answer --- it is non-functional.

[Mihaill]

But how used BT on windows?

[JonB]

@Mihaill ...By using the MSVC compiler... ?

[Mihaill]

thank, it's work