diff --git a/commandwidget.h b/commandwidget.h
new file mode 100644
--- /dev/null
+++ b/commandwidget.h
@@ -0,0 +1,58 @@
+/*
+  Copyright © 2015 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef COMMANDWIDGET_H
+#define COMMANDWIDGET_H
+
+#include <QWidget>
+#include <QByteArray>
+
+namespace Ui {
+class CommandWidget;
+}
+
+class CommandWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit CommandWidget(QWidget *parent = 0);
+    ~CommandWidget();
+
+signals:
+    void deleteRequested(CommandWidget* thisWidget); // emitted when delete button is clicked
+
+    // emitted when send button is clicked
+    //
+    // in case of hex mode, command text should be a hexadecimal
+    // string containing hexadecimal characters only (not even spaces)
+    void sendCommand(QByteArray command);
+
+private:
+    Ui::CommandWidget *ui;
+
+    bool isASCIIMode(); // true: ascii mode, false hex mode
+
+private slots:
+    void onDeleteClicked();
+    void onSendClicked();
+    void onASCIIToggled(bool checked);
+};
+
+#endif // COMMANDWIDGET_H