diff --git a/mainwindow.cpp b/mainwindow.cpp
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -234,7 +234,6 @@ void MainWindow::selectParity(int parity
 
 void MainWindow::selectDataBits(int dataBits)
 {
-    qDebug() << dataBits;
     if (serialPort.isOpen())
     {
         if(!serialPort.setDataBits((QSerialPort::DataBits) dataBits))