Qt 5.11 | Qt Bluetooth | Bluetooth Low Energy Heart Rate Game | devicehandler.h Example File

Qt 5.11.3 Reference Documentation

# devicehandler.h Example File

heartrate-game/devicehandler.h

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      #ifndef DEVICEHANDLER_H
      #define DEVICEHANDLER_H

      #include "bluetoothbaseclass.h"

      #include <QDateTime>
      #include <QVector>
      #include <QTimer>
      #include <QLowEnergyController>
      #include <QLowEnergyService>

      class DeviceInfo;

      class DeviceHandler : public BluetoothBaseClass
      {
          Q_OBJECT

          Q_PROPERTY(bool measuring READ measuring NOTIFY measuringChanged)
          Q_PROPERTY(bool alive READ alive NOTIFY aliveChanged)
          Q_PROPERTY(int hr READ hr NOTIFY statsChanged)
          Q_PROPERTY(int maxHR READ maxHR NOTIFY statsChanged)
          Q_PROPERTY(int minHR READ minHR NOTIFY statsChanged)
          Q_PROPERTY(float average READ average NOTIFY statsChanged)
          Q_PROPERTY(int time READ time NOTIFY statsChanged)
          Q_PROPERTY(float calories READ calories NOTIFY statsChanged)
          Q_PROPERTY(AddressType addressType READ addressType WRITE setAddressType)

      public:
          enum class AddressType {
              PublicAddress,
              RandomAddress
          };
          Q_ENUM(AddressType)

          DeviceHandler(QObject *parent = 0);

          void setDevice(DeviceInfo *device);
          void setAddressType(AddressType type);
          AddressType addressType() const;

          bool measuring() const;
          bool alive() const;

          // Statistics
          int hr() const;
          int time() const;
          float average() const;
          int maxHR() const;
          int minHR() const;
          float calories() const;

      signals:
          void measuringChanged();
          void aliveChanged();
          void statsChanged();

      public slots:
          void startMeasurement();
          void stopMeasurement();
          void disconnectService();

      private:
          //QLowEnergyController
          void serviceDiscovered(const QBluetoothUuid &);
          void serviceScanDone();

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

      #ifdef SIMULATOR
          void updateDemoHR();
      #endif
      private:
          void addMeasurement(int value);

          QLowEnergyController *m_control;
          QLowEnergyService *m_service;
          QLowEnergyDescriptor m_notificationDesc;
          DeviceInfo *m_currentDevice;

          bool m_foundHeartRateService;
          bool m_measuring;
          int m_currentValue, m_min, m_max, m_sum;
          float m_avg, m_calories;

          // Statistics
          QDateTime m_start;
          QDateTime m_stop;

          QVector<int> m_measurements;
          QLowEnergyController::RemoteAddressType m_addressType = QLowEnergyController::PublicAddress;

      #ifdef SIMULATOR
          QTimer m_demoTimer;
      #endif
      };

      #endif // DEVICEHANDLER_H