read and write in serial port

[neda]

Hi
I'm using Qt version 5.5.1 from windows 8.1.
I create a Qt Quick Controls Application.
Port opens, but I can not read data.

main.cpp:

#include <QApplication>
#include <QQmlApplicationEngine>
#include <QtSerialPort/QtSerialPort>
#include <myserialport.h>
#include <mythread.h>
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
 
    MySerialPort();
 
    return app.exec();
}

#include <QApplication>
#include <QQmlApplicationEngine>
#include <QtSerialPort/QtSerialPort>
#include <myserialport.h>
#include <mythread.h>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

    MySerialPort();

    return app.exec();
}

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myserialport.cpp:

#include "myserialport.h"
#include <QtSerialPort/QSerialPort>
#include <QMessageBox>
#include <QObject>
 
MySerialPort::MySerialPort()
{
    serial = new QSerialPort(this);
    connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));
    openSerialPort();
}
 
 
void MySerialPort::openSerialPort()
{
    serial->setPortName("COM3");
    serial->setBaudRate(QSerialPort::Baud9600);
    serial->setDataBits(QSerialPort::Data8);
    serial->setParity(QSerialPort::NoParity);
    serial->setStopBits(QSerialPort::OneStop);
    serial->setFlowControl(QSerialPort::NoFlowControl);
    if (serial->open(QIODevice::ReadWrite)) {
 
        showStatusMessage("Connectedd");
 
    } else {
 
        showStatusMessage(tr("Open error"));
    }
}
 
void MySerialPort::closeSerialPort()
{
    if (serial->isOpen())
        serial->close();
 
    showStatusMessage(tr("Disconnected"));
}
 
void MySerialPort::writeData(const QByteArray &data)
{
    serial->write(data);
}
 
void MySerialPort::readData()
{
   QByteArray data = serial->readAll();
 
   qDebug() << data;
 
}
 
void MySerialPort::handleError(QSerialPort::SerialPortError error)
{
    if (error == QSerialPort::ResourceError) {
        closeSerialPort();
    }
}
 
 
void MySerialPort::showStatusMessage(const QString &message)
{
    qDebug() << message;
}

#include "myserialport.h"
#include <QtSerialPort/QSerialPort>
#include <QMessageBox>
#include <QObject>

MySerialPort::MySerialPort()
{
    serial = new QSerialPort(this);
    connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));
    openSerialPort();
}


void MySerialPort::openSerialPort()
{
    serial->setPortName("COM3");
    serial->setBaudRate(QSerialPort::Baud9600);
    serial->setDataBits(QSerialPort::Data8);
    serial->setParity(QSerialPort::NoParity);
    serial->setStopBits(QSerialPort::OneStop);
    serial->setFlowControl(QSerialPort::NoFlowControl);
    if (serial->open(QIODevice::ReadWrite)) {

        showStatusMessage("Connectedd");

    } else {

        showStatusMessage(tr("Open error"));
    }
}

void MySerialPort::closeSerialPort()
{
    if (serial->isOpen())
        serial->close();

    showStatusMessage(tr("Disconnected"));
}

void MySerialPort::writeData(const QByteArray &data)
{
    serial->write(data);
}

void MySerialPort::readData()
{
   QByteArray data = serial->readAll();

   qDebug() << data;

}

void MySerialPort::handleError(QSerialPort::SerialPortError error)
{
    if (error == QSerialPort::ResourceError) {
        closeSerialPort();
    }
}


void MySerialPort::showStatusMessage(const QString &message)
{
    qDebug() << message;
}

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myserialport.h:

#include "myserialport.h"
#include <QtSerialPort/QSerialPort>
#include <QMessageBox>
#include <QObject>
 
MySerialPort::MySerialPort()
{
    serial = new QSerialPort(this);
    connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));
    openSerialPort();
}
 
 
void MySerialPort::openSerialPort()
{
    serial->setPortName("COM3");
    serial->setBaudRate(QSerialPort::Baud9600);
    serial->setDataBits(QSerialPort::Data8);
    serial->setParity(QSerialPort::NoParity);
    serial->setStopBits(QSerialPort::OneStop);
    serial->setFlowControl(QSerialPort::NoFlowControl);
    if (serial->open(QIODevice::ReadWrite)) {
 
        showStatusMessage("Connectedd");
 
    } else {
 
        showStatusMessage(tr("Open error"));
    }
}
 
void MySerialPort::closeSerialPort()
{
    if (serial->isOpen())
        serial->close();
 
    showStatusMessage(tr("Disconnected"));
}
 
void MySerialPort::writeData(const QByteArray &data)
{
    serial->write(data);
}
 
void MySerialPort::readData()
{
   QByteArray data = serial->readAll();
 
   qDebug() << data;
 
}
 
void MySerialPort::handleError(QSerialPort::SerialPortError error)
{
    if (error == QSerialPort::ResourceError) {
        closeSerialPort();
    }
}
 
 
void MySerialPort::showStatusMessage(const QString &message)
{
    qDebug() << message;
}

#include "myserialport.h"
#include <QtSerialPort/QSerialPort>
#include <QMessageBox>
#include <QObject>

MySerialPort::MySerialPort()
{
    serial = new QSerialPort(this);
    connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));
    openSerialPort();
}


void MySerialPort::openSerialPort()
{
    serial->setPortName("COM3");
    serial->setBaudRate(QSerialPort::Baud9600);
    serial->setDataBits(QSerialPort::Data8);
    serial->setParity(QSerialPort::NoParity);
    serial->setStopBits(QSerialPort::OneStop);
    serial->setFlowControl(QSerialPort::NoFlowControl);
    if (serial->open(QIODevice::ReadWrite)) {

        showStatusMessage("Connectedd");

    } else {

        showStatusMessage(tr("Open error"));
    }
}

void MySerialPort::closeSerialPort()
{
    if (serial->isOpen())
        serial->close();

    showStatusMessage(tr("Disconnected"));
}

void MySerialPort::writeData(const QByteArray &data)
{
    serial->write(data);
}

void MySerialPort::readData()
{
   QByteArray data = serial->readAll();

   qDebug() << data;

}

void MySerialPort::handleError(QSerialPort::SerialPortError error)
{
    if (error == QSerialPort::ResourceError) {
        closeSerialPort();
    }
}


void MySerialPort::showStatusMessage(const QString &message)
{
    qDebug() << message;
}

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myproject.pro:

TEMPLATE = app
 
QT += qml quick widgets
QT += serialport
 
SOURCES += main.cpp \
    myserialport.cpp \
    mythread.cpp
 
RESOURCES += qml.qrc
 
# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =
 
# Default rules for deployment.
include(deployment.pri)
 
HEADERS += \
    myserialport.h \
    mythread.h

TEMPLATE = app

QT += qml quick widgets
QT += serialport

SOURCES += main.cpp \
    myserialport.cpp \
    mythread.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Default rules for deployment.
include(deployment.pri)

HEADERS += \
    myserialport.h \
    mythread.h

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