mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->serialPort = new QSerialPort;

    QStringList ports;
    const auto serialPortInfos = QSerialPortInfo::availablePorts();
    int i = 0;
    for (const QSerialPortInfo &serialPortInfo : serialPortInfos){
        ports.insert(i,serialPortInfo.portName());
        i++;
    }
    ui->comboBox_port->insertItems(0,ports);

    QStringList bauds;
    bauds << "9600" << "19200" << "38400" << "57600" << "115200";
    ui->comboBox_baud->insertItems(0,bauds);

    connect(ui->pushButton_connect,SIGNAL(clicked(bool)),this,SLOT(connectToSerial()));
    //connect(this,SIGNAL(startReading(bool)),this,SLOT(startReading()));
    connect(this->serialPort,SIGNAL(readyRead()),this,SLOT(startReading()));

}

void MainWindow::startReading()
{
    QByteArray readData = this->serialPort->readAll();
    qDebug() << readData;
    if (this->ON){
        this->ON = false;
        this->serialPort->write("1\n");
    }
    else{
        this->ON = true;
        this->serialPort->write("0\n");
    }

    /*
    while (this->serialPort->waitForReadyRead(5000)){
        readData = this->serialPort->readAll();
        qDebug() << readData;
    }
    */
}

void MainWindow::connectToSerial()
{
    if (this->serialPort->isOpen()){
        this->serialPort->close();
        ui->label_status->setText("Desconectado");
        ui->pushButton_connect->setText("Conectar");
        return;
    }
    this->serialPort->setPortName(ui->comboBox_port->currentText());
    this->serialPort->setBaudRate(ui->comboBox_baud->currentText().toUInt());

    if (!this->serialPort->open(QIODevice::ReadWrite)){
        ui->label_status->setText("Falha ao tentar conectar");
        return;
    }
    ui->label_status->setText("Conectado");
    ui->pushButton_connect->setText("Desconectar");

    emit startReading(true);
}

MainWindow::~MainWindow()
{
    delete ui;
}