device.h Example File

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 #ifndef DEVICE_H
 #define DEVICE_H

 #include <qbluetoothlocaldevice.h>
 #include <QObject>
 #include <QVariant>
 #include <QList>
 #include <QBluetoothServiceDiscoveryAgent>
 #include <QBluetoothDeviceDiscoveryAgent>
 #include <QLowEnergyController>
 #include <QBluetoothServiceInfo>
 #include "deviceinfo.h"
 #include "serviceinfo.h"
 #include "characteristicinfo.h"

 QT_FORWARD_DECLARE_CLASS (QBluetoothDeviceInfo)
 QT_FORWARD_DECLARE_CLASS (QBluetoothServiceInfo)

 class Device: public QObject
 {
     Q_OBJECT
     Q_PROPERTY(QVariant devicesList READ getDevices NOTIFY devicesUpdated)
     Q_PROPERTY(QVariant servicesList READ getServices NOTIFY servicesUpdated)
     Q_PROPERTY(QVariant characteristicList READ getCharacteristics NOTIFY characteristicsUpdated)
     Q_PROPERTY(QString update READ getUpdate WRITE setUpdate NOTIFY updateChanged)
     Q_PROPERTY(bool useRandomAddress READ isRandomAddress WRITE setRandomAddress NOTIFY randomAddressChanged)
     Q_PROPERTY(bool state READ state NOTIFY stateChanged)
     Q_PROPERTY(bool controllerError READ hasControllerError)
 public:
     Device();
     ~Device();
     QVariant getDevices();
     QVariant getServices();
     QVariant getCharacteristics();
     QString getUpdate();
     bool state();
     bool hasControllerError() const;

     bool isRandomAddress() const;
     void setRandomAddress(bool newValue);

 public slots:
     void startDeviceDiscovery();
     void scanServices(const QString &address);

     void connectToService(const QString &uuid);
     void disconnectFromDevice();

 private slots:
     // QBluetoothDeviceDiscoveryAgent related
     void addDevice(const QBluetoothDeviceInfo&);
     void deviceScanFinished();
     void deviceScanError(QBluetoothDeviceDiscoveryAgent::Error);

     // QLowEnergyController realted
     void addLowEnergyService(const QBluetoothUuid &uuid);
     void deviceConnected();
     void errorReceived(QLowEnergyController::Error);
     void serviceScanDone();
     void deviceDisconnected();

     // QLowEnergyService related
     void serviceDetailsDiscovered(QLowEnergyService::ServiceState newState);

 Q_SIGNALS:
     void devicesUpdated();
     void servicesUpdated();
     void characteristicsUpdated();
     void updateChanged();
     void stateChanged();
     void disconnected();
     void randomAddressChanged();

 private:
     void setUpdate(const QString &message);
     QBluetoothDeviceDiscoveryAgent *discoveryAgent;
     DeviceInfo currentDevice;
     QList<QObject *> devices;
     QList<QObject *> m_services;
     QList<QObject *> m_characteristics;
     QString m_previousAddress;
     QString m_message;
     bool connected = false;
     QLowEnergyController *controller = nullptr;
     bool m_deviceScanState = false;
     bool randomAddress = false;
 };

 #endif // DEVICE_H