diff --git a/src/framedreader.cpp b/src/framedreader.cpp
--- a/src/framedreader.cpp
+++ b/src/framedreader.cpp
@@ -36,6 +36,7 @@ FramedReader::FramedReader(QIODevice* de
     syncWord = _settingsWidget.syncWord();
     checksumEnabled = _settingsWidget.isChecksumEnabled();
     onNumberFormatChanged(_settingsWidget.numberFormat());
+    debugModeEnabled = _settingsWidget.isDebugModeEnabled();
     checkSettings();
 
     // init setting connections
@@ -54,6 +55,9 @@ FramedReader::FramedReader(QIODevice* de
     connect(&_settingsWidget, &FramedReaderSettings::checksumChanged,
             [this](bool enabled){checksumEnabled = enabled; reset();});
 
+    connect(&_settingsWidget, &FramedReaderSettings::debugModeChanged,
+            [this](bool enabled){debugModeEnabled = enabled;});
+
     // init reader state
     reset();
 }
@@ -235,6 +239,7 @@ void FramedReader::onDataReady()
             }
             else
             {
+                if (debugModeEnabled) qDebug() << "Frame size:" << frameSize;
                 gotSize = true;
             }
         }
diff --git a/src/framedreader.h b/src/framedreader.h
--- a/src/framedreader.h
+++ b/src/framedreader.h
@@ -57,6 +57,7 @@ private:
     bool checksumEnabled;
     bool hasSizeByte;
     unsigned frameSize;
+    bool debugModeEnabled;
 
     /// Checks the validity of syncWord and frameSize then shows an
     /// error message. Also updates `settingsInvalid`. If settings are
@@ -79,7 +80,6 @@ private:
     // `data` contains i th channels data
     void addChannelData(unsigned int channel, double* data, unsigned size);
 
-
 private slots:
     void onDataReady();
 
diff --git a/src/framedreadersettings.cpp b/src/framedreadersettings.cpp
--- a/src/framedreadersettings.cpp
+++ b/src/framedreadersettings.cpp
@@ -35,6 +35,9 @@ FramedReaderSettings::FramedReaderSettin
                 emit checksumChanged(enabled);
             });
 
+    connect(ui->cbDebugMode, &QCheckBox::toggled,
+            this, &FramedReaderSettings::debugModeChanged);
+
     connect(ui->rbFixedSize, &QRadioButton::toggled,
             ui->spSize, &QWidget::setEnabled);
 
@@ -135,3 +138,8 @@ bool FramedReaderSettings::isChecksumEna
 {
     return ui->cbChecksum->isChecked();
 }
+
+bool FramedReaderSettings::isDebugModeEnabled()
+{
+    return ui->cbDebugMode->isChecked();
+}
diff --git a/src/framedreadersettings.h b/src/framedreadersettings.h
--- a/src/framedreadersettings.h
+++ b/src/framedreadersettings.h
@@ -46,6 +46,7 @@ public:
     QByteArray syncWord();
     unsigned frameSize(); /// If frame bye is enabled `0` is returned
     bool isChecksumEnabled();
+    bool isDebugModeEnabled();
 
 signals:
     /// If sync word is invalid (empty or 1 nibble missing at the end)
@@ -56,6 +57,7 @@ signals:
     void checksumChanged(bool);
     void numOfChannelsChanged(unsigned);
     void numberFormatChanged(NumberFormat);
+    void debugModeChanged(bool);
 
 private:
     Ui::FramedReaderSettings *ui;
diff --git a/src/framedreadersettings.ui b/src/framedreadersettings.ui
--- a/src/framedreadersettings.ui
+++ b/src/framedreadersettings.ui
@@ -75,6 +75,22 @@
     <string>All is well.</string>
    </property>
   </widget>
+  <widget class="QCheckBox" name="cbDebugMode">
+   <property name="geometry">
+    <rect>
+     <x>360</x>
+     <y>160</y>
+     <width>111</width>
+     <height>22</height>
+    </rect>
+   </property>
+   <property name="toolTip">
+    <string>Enable printing of extra log messages that can be useful for debugging</string>
+   </property>
+   <property name="text">
+    <string>Debug Mode</string>
+   </property>
+  </widget>
   <widget class="QGroupBox" name="groupBox">
    <property name="geometry">
     <rect>