Qt 5.7 | Qt Bluetooth | Bluetooth Low Energy Heart Listener Example | heartrate.h Example File

Qt 5.7.1 Reference Documentation

# heartrate.h Example File

heartlistener/heartrate.h

      /***************************************************************************
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      ** Copyright (C) 2014 BlackBerry Limited. All rights reserved.
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit.
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      #ifndef HEARTRATE_H
      #define HEARTRATE_H

      #include "deviceinfo.h"

      #include <QString>
      #include <QDebug>
      #include <QDateTime>
      #include <QVector>
      #include <QTimer>
      #include <QBluetoothDeviceDiscoveryAgent>
      #include <QBluetoothDeviceInfo>
      #include <QLowEnergyController>
      #include <QLowEnergyService>

      QT_USE_NAMESPACE
      class HeartRate: public QObject
      {
          Q_OBJECT
          Q_PROPERTY(QVariant name READ name NOTIFY nameChanged)
          Q_PROPERTY(QString message READ message NOTIFY messageChanged)
          Q_PROPERTY(int hr READ hR NOTIFY hrChanged)
          Q_PROPERTY(int maxHR READ maxHR NOTIFY averageChanged)
          Q_PROPERTY(int minHR READ minHR NOTIFY averageChanged)
          Q_PROPERTY(float average READ average NOTIFY averageChanged)
          Q_PROPERTY(int time READ time NOTIFY timeChanged)
          Q_PROPERTY(float calories READ caloriesCalculation NOTIFY caloriesChanged)

      public:
          HeartRate();
          ~HeartRate();
          void setMessage(QString message);
          QString message() const;
          QVariant name();
          int hR() const;
          int time();
          float average();
          int maxHR() const;
          int minHR() const;
          float caloriesCalculation();

      public slots:
          void deviceSearch();
          void connectToService(const QString &address);
          void disconnectService();
          void startDemo();

          void obtainResults();
          int measurements(int index) const;
          int measurementsSize() const;
          QString deviceAddress() const;
          int numDevices() const;

      private slots:
          //QBluetothDeviceDiscoveryAgent
          void addDevice(const QBluetoothDeviceInfo&);
          void scanFinished();
          void deviceScanError(QBluetoothDeviceDiscoveryAgent::Error);

          //QLowEnergyController
          void serviceDiscovered(const QBluetoothUuid &);
          void serviceScanDone();
          void controllerError(QLowEnergyController::Error);
          void deviceConnected();
          void deviceDisconnected();

          //QLowEnergyService
          void serviceStateChanged(QLowEnergyService::ServiceState s);
          void updateHeartRateValue(const QLowEnergyCharacteristic &c,
                                    const QByteArray &value);
          void confirmedDescriptorWrite(const QLowEnergyDescriptor &d,
                                    const QByteArray &value);
          void serviceError(QLowEnergyService::ServiceError e);

          //DemoMode
          void receiveDemo();

      Q_SIGNALS:
          void messageChanged();
          void nameChanged();
          void hrChanged();
          void averageChanged();
          void timeChanged();
          void caloriesChanged();

      private:
          int randomPulse() const;

          DeviceInfo m_currentDevice;
          QBluetoothDeviceDiscoveryAgent *m_deviceDiscoveryAgent;
          QLowEnergyDescriptor m_notificationDesc;
          QList<QObject*> m_devices;
          QString m_info;
          bool foundHeartRateService;
          QVector<quint16> m_measurements;
          QDateTime m_start;
          QDateTime m_stop;
          int m_max;
          int m_min;
          float calories;
          QLowEnergyController *m_control;
          QTimer *timer; // for demo application
          QLowEnergyService *m_service;
      };

      #endif // HEARTRATE_H