diff --git a/commandedit.cpp b/commandedit.cpp
--- a/commandedit.cpp
+++ b/commandedit.cpp
@@ -72,6 +72,9 @@ CommandEdit::~CommandEdit()
     delete hexValidator;
 }
 
+QString unEscape(QString str);
+QString escape(QString str);
+
 void CommandEdit::setMode(bool ascii)
 {
     ascii_mode = ascii;
@@ -87,12 +90,13 @@ void CommandEdit::setMode(bool ascii)
             hexText.replace(hexText.size()-1, 1, "3F"); // 0x3F = '?'
             qWarning() << "Broken byte in hex command is replaced. Check your command!";
         }
-        setText(QByteArray::fromHex(hexText.toLatin1()));
+
+        setText(escape(QByteArray::fromHex(hexText.toLatin1())));
     }
     else
     {
         setValidator(hexValidator);
-        setText(text().toLatin1().toHex());
+        setText(unEscape(text()).toLatin1().toHex());
     }
 }
 
@@ -115,3 +119,24 @@ void CommandEdit::keyPressEvent(QKeyEven
 
     QLineEdit::keyPressEvent(event);
 }
+
+QString CommandEdit::unEscapedText()
+{
+    return unEscape(text());
+}
+
+QString unEscape(QString str)
+{
+    str.replace("\\n", "\n");
+    str.replace("\\r", "\r");
+    str.replace("\\t", "\t");
+    return str;
+}
+
+QString escape(QString str)
+{
+    str.replace("\n", "\\n");
+    str.replace("\r", "\\r");
+    str.replace("\t", "\\t");
+    return str;
+}
diff --git a/commandedit.h b/commandedit.h
--- a/commandedit.h
+++ b/commandedit.h
@@ -22,6 +22,7 @@
 
 #include <QLineEdit>
 #include <QValidator>
+#include <QString>
 
 class CommandEdit : public QLineEdit
 {
@@ -31,6 +32,7 @@ public:
     explicit CommandEdit(QWidget *parent = 0);
     ~CommandEdit();
     void setMode(bool ascii); // true = ascii, false = hex
+    QString unEscapedText(); // return unescaped text(), used in ascii_mode only
 
 private:
     bool ascii_mode;
diff --git a/commandwidget.cpp b/commandwidget.cpp
--- a/commandwidget.cpp
+++ b/commandwidget.cpp
@@ -60,7 +60,7 @@ void CommandWidget::onSendClicked()
     if (isASCIIMode())
     {
         qDebug() << "Sending:" << command;
-        emit sendCommand(command.toLatin1());
+        emit sendCommand(ui->leCommand->unEscapedText().toLatin1());
     }
     else // hex mode
     {