diff --git a/src/demoreader.h b/src/demoreader.h
new file mode 100644
--- /dev/null
+++ b/src/demoreader.h
@@ -0,0 +1,66 @@
+/*
+  Copyright © 2016 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 DEMOREADER_H
+#define DEMOREADER_H
+
+#include <QTimer>
+
+#include "abstractreader.h"
+
+/**
+ * This is a special case of reader implementation and should be used
+ * with care.
+ *
+ * There is no settings widget. Number of channels should be set from
+ * currently selected actual readers settings widget.
+ *
+ * This reader should not be enabled when port is open!
+ */
+class DemoReader : public AbstractReader
+{
+    Q_OBJECT
+
+public:
+    explicit DemoReader(QIODevice* device, ChannelManager* channelMan, QObject *parent = 0);
+
+    /// Demo reader is an exception so this function returns NULL
+    QWidget* settingsWidget();
+
+    unsigned numOfChannels();
+
+    void enable(bool enabled = true);
+
+public slots:
+    void pause(bool);
+
+    /// Sets the number of channels, this doesn't trigger a `numOfChannelsChanged` signal.
+    void setNumOfChannels(unsigned value);
+
+private:
+    bool paused;
+    unsigned _numOfChannels;
+    QTimer timer;
+    int count;
+
+private slots:
+    void demoTimerTimeout();
+};
+
+#endif // DEMOREADER_H