diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -29,10 +29,13 @@
 #include <QDesktopServices>
 #include <QMap>
 #include <QtDebug>
+#include <QCommandLineParser>
+#include <QFileInfo>
 #include <qwt_plot.h>
 #include <limits.h>
 #include <cmath>
 #include <iostream>
+#include <cstdlib>
 
 #include <plot.h>
 #include <barplot.h>
@@ -251,9 +254,11 @@ MainWindow::MainWindow(QWidget *parent) 
     onSourceChanged(dataFormatPanel.activeSource());
 
     // load default settings
-    QSettings settings("serialplot", "serialplot");
+    QSettings settings(PROGRAM_NAME, PROGRAM_NAME);
     loadAllSettings(&settings);
 
+    handleCommandLineOptions(*QApplication::instance());
+
     // ensure command panel has 1 command if none loaded
     if (!commandPanel.numOfCommands())
     {
@@ -300,7 +305,7 @@ void MainWindow::closeEvent(QCloseEvent 
     }
 
     // save settings
-    QSettings settings("serialplot", "serialplot");
+    QSettings settings(PROGRAM_NAME, PROGRAM_NAME);
     saveAllSettings(&settings);
     settings.sync();
 
@@ -474,44 +479,16 @@ PlotViewSettings MainWindow::viewSetting
 }
 
 void MainWindow::messageHandler(QtMsgType type,
-                                const QMessageLogContext &context,
+                                const QString &logString,
                                 const QString &msg)
 {
-    QString logString;
-
-    switch (type)
-    {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 5, 0))
-        case QtInfoMsg:
-            logString = "[Info] " + msg;
-            break;
-#endif
-        case QtDebugMsg:
-            logString = "[Debug] " + msg;
-            break;
-        case QtWarningMsg:
-            logString = "[Warning] " + msg;
-            break;
-        case QtCriticalMsg:
-            logString = "[Error] " + msg;
-            break;
-        case QtFatalMsg:
-            logString = "[Fatal] " + msg;
-            break;
-    }
-
-    if (ui != NULL) ui->ptLog->appendPlainText(logString);
-    std::cerr << logString.toStdString() << std::endl;
+    if (ui != NULL)
+        ui->ptLog->appendPlainText(logString);
 
     if (type != QtDebugMsg && ui != NULL)
     {
         ui->statusBar->showMessage(msg, 5000);
     }
-
-    if (type == QtFatalMsg)
-    {
-        __builtin_trap();
-    }
 }
 
 void MainWindow::saveAllSettings(QSettings* settings)
@@ -616,3 +593,56 @@ void MainWindow::onLoadSettings()
         loadAllSettings(&settings);
     }
 }
+
+void MainWindow::handleCommandLineOptions(const QCoreApplication &app)
+{
+    QCommandLineParser parser;
+    parser.setSingleDashWordOptionMode(QCommandLineParser::ParseAsCompactedShortOptions);
+    parser.setApplicationDescription("Small and simple software for plotting data from serial port in realtime.");
+    parser.addHelpOption();
+    parser.addVersionOption();
+
+    QCommandLineOption configOpt({"c", "config"}, "Load configuration from file.", "filename");
+    QCommandLineOption portOpt({"p", "port"}, "Set port name.", "port name");
+    QCommandLineOption baudrateOpt({"b" ,"baudrate"}, "Set port baud rate.", "baud rate");
+    QCommandLineOption openPortOpt({"o", "open"}, "Open serial port.");
+
+    parser.addOption(configOpt);
+    parser.addOption(portOpt);
+    parser.addOption(baudrateOpt);
+    parser.addOption(openPortOpt);
+
+    parser.process(app);
+
+    if (parser.isSet(configOpt))
+    {
+        QString fileName = parser.value(configOpt);
+        QFileInfo fileInfo(fileName);
+
+        if (fileInfo.exists() && fileInfo.isFile())
+        {
+            QSettings settings(fileName, QSettings::IniFormat);
+            loadAllSettings(&settings);
+        }
+        else
+        {
+            qCritical() << "Configuration file not exist. Closing application.";
+            std::exit(1);
+        }
+    }
+
+    if (parser.isSet(portOpt))
+    {
+        portControl.selectPort(parser.value(portOpt));
+    }
+
+    if (parser.isSet(baudrateOpt))
+    {
+        portControl.selectBaudrate(parser.value(baudrateOpt));
+    }
+
+    if (parser.isSet(openPortOpt))
+    {
+        portControl.openPort();
+    }
+}