main.cpp Example File

  /****************************************************************************
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  ** Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
  ** Contact: https://www.qt.io/licensing/
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  ** This file is part of the QtSerialPort module of the Qt Toolkit.
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  #include <QtSerialPort/QSerialPort>

  #include <QTextStream>
  #include <QCoreApplication>
  #include <QFile>
  #include <QStringList>

  QT_USE_NAMESPACE

  int main(int argc, char *argv[])
  {
      QCoreApplication coreApplication(argc, argv);
      int argumentCount = QCoreApplication::arguments().size();
      QStringList argumentList = QCoreApplication::arguments();

      QTextStream standardOutput(stdout);

      if (argumentCount == 1) {
          standardOutput << QObject::tr("Usage: %1 <serialportname> [baudrate]").arg(argumentList.first()) << endl;
          return 1;
      }

      QSerialPort serialPort;
      QString serialPortName = argumentList.at(1);
      serialPort.setPortName(serialPortName);

      int serialPortBaudRate = (argumentCount > 2) ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
      serialPort.setBaudRate(serialPortBaudRate);

      if (!serialPort.open(QIODevice::WriteOnly)) {
          standardOutput << QObject::tr("Failed to open port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
          return 1;
      }

      QFile dataFile;
      if (!dataFile.open(stdin, QIODevice::ReadOnly)) {
          standardOutput << QObject::tr("Failed to open stdin for reading") << endl;
          return 1;
      }

      QByteArray writeData(dataFile.readAll());
      dataFile.close();

      if (writeData.isEmpty()) {
          standardOutput << QObject::tr("Either no data was currently available on the standard input for reading, or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
          return 1;
      }

      qint64 bytesWritten = serialPort.write(writeData);

      if (bytesWritten == -1) {
          standardOutput << QObject::tr("Failed to write the data to port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
          return 1;
      } else if (bytesWritten != writeData.size()) {
          standardOutput << QObject::tr("Failed to write all the data to port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
          return 1;
      } else if (!serialPort.waitForBytesWritten(5000)) {
          standardOutput << QObject::tr("Operation timed out or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
          return 1;
      }

      standardOutput << QObject::tr("Data successfully sent to port %1").arg(serialPortName) << endl;

      return 0;
  }