diff --git a/src/datarecorder.cpp b/src/datarecorder.cpp
new file mode 100644
--- /dev/null
+++ b/src/datarecorder.cpp
@@ -0,0 +1,89 @@
+/*
+  Copyright © 2017 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/>.
+*/
+
+#include "datarecorder.h"
+
+#include <QtDebug>
+
+DataRecorder::DataRecorder(QObject *parent) :
+    QObject(parent),
+    fileStream(&file)
+{
+    lastNumChannels = 0;
+    disableBuffering = false;
+}
+
+bool DataRecorder::startRecording(QString fileName, QString separator, QStringList channelNames)
+{
+    Q_ASSERT(!file.isOpen());
+    _sep =  separator;
+
+    // open file
+    file.setFileName(fileName);
+    if (!file.open(QIODevice::WriteOnly))
+    {
+        qCritical() << "Opening file " << fileName
+                    << " for recording failed with error: " << file.error();
+        return false;
+    }
+
+    // write header line
+    if (!channelNames.isEmpty())
+    {
+        fileStream << channelNames.join(_sep);
+        fileStream << "\n";
+        lastNumChannels = channelNames.length();
+    }
+    return true;
+}
+
+void DataRecorder::addData(double* data, unsigned length, unsigned numOfChannels)
+{
+    Q_ASSERT(length > 0);
+    Q_ASSERT(length % numOfChannels == 0);
+
+    if (lastNumChannels != 0 && numOfChannels != lastNumChannels)
+    {
+        qWarning() << "Number of channels changed from " << lastNumChannels
+                   << " to " << numOfChannels <<
+            " during recording, CSV file is corrupted but no data will be lost.";
+    }
+    lastNumChannels = numOfChannels;
+
+    unsigned numOfSamples = length / numOfChannels; // per channel
+    for (unsigned int i = 0; i < numOfSamples; i++)
+    {
+        for (unsigned ci = 0; ci < numOfChannels; ci++)
+        {
+            fileStream << data[ci * numOfSamples + i];
+            if (ci != numOfChannels-1) fileStream << _sep;
+        }
+        fileStream << '\n';
+    }
+
+    if (disableBuffering) fileStream.flush();
+}
+
+void DataRecorder::stopRecording()
+{
+    Q_ASSERT(file.isOpen());
+
+    file.close();
+    lastNumChannels = 0;
+}