powermeter.h

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/* Copyright 2018 Michael Olberg <michael.olberg@chalmers.se> */
#ifndef POWERMETER_H
#define POWERMETER_H

#include <QObject>
#include <QTcpSocket>
#include <QByteArray>
#include <QString>

class PowerMeter : public QObject {
    Q_OBJECT

 public:
    static PowerMeter *instance()
    {
        if (pm_instance == 0) pm_instance = new PowerMeter();
        return pm_instance;
    }

    ~PowerMeter();

    void init();                  
    float reading();              
    bool isConnected() { return m_connected; }  

 signals:
    // void error();
    void connectionStatus(bool ok);
    void newReading(float p);

 private:
    static PowerMeter *pm_instance;
    PowerMeter();

    void connectToServer();
    void closeConnection();
    int tcpSendReceive(QString command, bool interactive);
    void dumpBuffer(QByteArray ba, bool in) const;

    void dumpBuffer(bool out, char* buf) const;

    double power;
    QByteArray sendBuffer;
    QByteArray recvBuffer;
    QTcpSocket socket;
    bool m_connected;
};

#endif  // POWERMETER_H