QML Button to Send Message over serial port .

[muhammadismail]

i am new in qt i need a program with one button in Qt Quick and C++ to send hex like <0x00 , 0x22 , 0xAA> Message Over Serial port .
i follow some tutorial and success to send the message with Qt Widget Application and C++ but i need to done with
Qt Quick and C++ any help to modify or make new one !
here my Qt Widget Application and C++ code :

//SMSSerialTest.pro
QT+= core gui serialport

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = SMSSerialtest
TEMPLATE = app

DEFINES += QT_DEPRECATED_WARNINGS


CONFIG += c++11

SOURCES += \
        main.cpp \
        mainwindow.cpp

HEADERS += \
        mainwindow.h

FORMS += \
        mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

---

//mailnwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}


class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void serialReceived();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

---

//main.cpp
#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

---

//mainwindwow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QSerialPort>
#include <QSerialPortInfo>

QSerialPort *serial;
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    serial = new QSerialPort(this);
    serial->setPortName("COM3");
    serial->setBaudRate(QSerialPort::Baud9600);
    serial->setDataBits(QSerialPort::Data8);
    serial->setParity(QSerialPort::NoParity);
    serial->setStopBits(QSerialPort::OneStop);
    serial->setFlowControl(QSerialPort::NoFlowControl);
    serial->open(QIODevice::ReadWrite);
    serial->write(QByteArray::fromHex("2255AA"));
    serial->waitForBytesWritten(20);
    serial->write(QByteArray::fromHex("014480"));
    serial->waitForBytesWritten(100);
    serial->close();

    connect(serial,SIGNAL(readyRead()),this,SLOT(serialReceived()));
}

MainWindow::~MainWindow()
{
    delete ui;
    serial->close();

}

void MainWindow::serialReceived()
{


   ui->label->setText(serial->readAll());

}

[SGaist]

Hi and welcome to devnet,

You should start by reading the QML CPP Integration chapter of Qt's documentation.

Then you can build a class that will handle the serial port communication and intersect with it from your QtQuick application.

[muhammadismail]

Thanks it was very helpful :)

[aha_1980]

Hi @muhammadismail,

if your problem is solved, so please mark this topic as SOLVED too.

Thanks