diff --git a/src/ATBAPP/ATBDeviceControllerPlugin.cpp b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
index f8e1447..0a28659 100644
--- a/src/ATBAPP/ATBDeviceControllerPlugin.cpp
+++ b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
@@ -85,6 +85,38 @@ PLUGIN_STATE ATBDeviceControllerPlugin::initDCPlugin(QObject *eventReceiver, con
 }
 
 
+void ATBDeviceControllerPlugin::startPhysicalLayer()
+{
+    if (this->pluginState == PLUGIN_STATE::NOT_INITIALIZED)
+    {
+        qCritical() << "ATBDeviceControllerPlugin::startPhysicalLayer(): plugin is not initialized";
+        return;
+    }
+
+    // open serial port
+    hw->dc_openSerial(5, "115200", this->serialPortName, 1);
+
+    hw->dc_autoRequest(true);
+}
+
+void ATBDeviceControllerPlugin::stopPhysicalLayer()
+{
+    if (this->pluginState == PLUGIN_STATE::NOT_INITIALIZED)
+    {
+        qCritical() << "ATBDeviceControllerPlugin::startPhysicalLayer(): plugin is not initialized";
+        return;
+    }
+
+    hw->dc_autoRequest(false);
+
+    hw->dc_closeSerial();
+}
+
+
+
+
+
+
 // Handle Mode-Changes --------------------------------------------------------
 
 void ATBDeviceControllerPlugin::onChangedProgramModeToSELL()
diff --git a/src/ATBAPP/ATBDeviceControllerPlugin.h b/src/ATBAPP/ATBDeviceControllerPlugin.h
index e8557c9..8a31c91 100644
--- a/src/ATBAPP/ATBDeviceControllerPlugin.h
+++ b/src/ATBAPP/ATBDeviceControllerPlugin.h
@@ -71,7 +71,8 @@ public slots:
     void onChangedProgramModeToIDLE();
     void onChangedProgramModeToOOO();
 
-
+    void startPhysicalLayer();
+    void stopPhysicalLayer();
 
 
 
diff --git a/src/ATBAPP/DeviceControllerInterface.h b/src/ATBAPP/DeviceControllerInterface.h
index b660a4c..09d6e3d 100644
--- a/src/ATBAPP/DeviceControllerInterface.h
+++ b/src/ATBAPP/DeviceControllerInterface.h
@@ -81,6 +81,10 @@ public slots:
     virtual void onChangedProgramModeToIDLE() = 0;
     virtual void onChangedProgramModeToOOO() = 0;
 
+    virtual void startPhysicalLayer() = 0;
+    virtual void stopPhysicalLayer() = 0;
+
+
 signals:
     void printTicketFinished(nsDeviceControllerInterface::RESULT_STATE resultState,
                                      const QString & errorCode,