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;
             }
         }