diff --git a/src/ATBAPP/ATBDeviceControllerPlugin.cpp b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
index a93926e..44dceb2 100644
--- a/src/ATBAPP/ATBDeviceControllerPlugin.cpp
+++ b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
@@ -8,6 +8,10 @@ ATBDeviceControllerPlugin::ATBDeviceControllerPlugin(QObject *parent) : QObject(
     this->pluginInfo = QString::fromUtf8(pluginInfoString.c_str());
 
     this->hw = new hwapi();
+
+    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_templatePrintFinished_OK()),  this, SLOT(onPrintFinishedOK()));
+    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_templatePrintFinished_Err()), this, SLOT(onPrintFinishedERR()));
+    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_gotNewCoin()), this, SLOT(onGotCoin()));
 }
 
 ATBDeviceControllerPlugin::~ATBDeviceControllerPlugin() {}
@@ -19,6 +23,8 @@ PLUGIN_STATE ATBDeviceControllerPlugin::initDCPlugin(QObject *healthEventReceive
     // Read a sample variable from setting
     QString sampleSetting = settings.value("DEVICE_CONTROLLER/sampleVariable", "defaultValue").toString();
 
+    hw->dc_openSerial(5, "115200", "ttymxc2", 1);
+
     this->pluginState = PLUGIN_STATE::INITIALIZED;
 
     return pluginState;
@@ -54,14 +60,60 @@ void ATBDeviceControllerPlugin::requestPrintTicket(const QHash<QString, QVariant
 
     strncpy((char*)dynTicketData->licensePlate, printingData["licenseplate"].toByteArray().data(), 7);
     strncpy((char*)dynTicketData->vendingPrice, printingData["amount"].toByteArray().data(), 7);
-    strncpy((char*)dynTicketData->parkingEnd,   printingData["parkingend"].toByteArray().data(), 7);
+    strncpy((char*)dynTicketData->parkingEnd,   printingData["parkingEnd"].toByteArray().data(), 7);
     strncpy((char*)dynTicketData->currentTime,  printingData["currentTime"].toByteArray().data(), 7);
     strncpy((char*)dynTicketData->currentDate,  printingData["currentDate"].toByteArray().data(), 7);
 
-    this->hw->prn_printDocument(1, dynTicketData);
+    // DEBUG
+    qCritical() << "ATBDeviceControllerPlugin::requestPrintTicket()";
+    if (!this->hw->dc_isPortOpen()) {
+        qCritical() << "    ... serial port is not open!";
+        emit this->onPrintFinishedERR();
+    }
+
+    if (!this->hw->prn_printDocument(1, dynTicketData)) {
+        this->errorCode = "hwapi::prn_printDocument";
+        this->errorDescription = "hwapi method 'hwapi::prn_printDocument' result is false";
+
+        qCritical() << "ERROR:";
+        qCritical() << "ATBDeviceControllerPlugin::requestPrintTicket( "        << endl
+                    << "     licenseplate = " << printingData["licenseplate"]   << endl
+                    << "           amount = " << printingData["amount"]         << endl
+                    << "       parkingEnd = " << printingData["parkingEnd"]     << endl
+                    << "      currentTime = " << printingData["currentTime"]    << endl
+                    << "      currentDate = " << printingData["currentDate"]    << endl;
+
+
+        emit this->onPrintFinishedERR();
+    }
 }
 
 
+/************************************************************************************************
+ * private slots, interface to low level hwapi
+ *
+ */
+void ATBDeviceControllerPlugin::onPrintFinishedOK()
+{
+    emit this->printTicketFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
+                                   "",
+                                   "");
+}
+void ATBDeviceControllerPlugin::onPrintFinishedERR()
+{
+    this->errorCode = "PRINTER";               // TODO: get more detailed error code from low level API
+    this->errorDescription = "Printer error";  // TODO: get more detailed error description from low level API
+
+    emit this->printTicketFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
+                                   this->errorCode,
+                                   this->errorDescription);
+}
+
+void ATBDeviceControllerPlugin::onGotCoin()
+{
+
+}
+
 
 
 /************************************************************************************************
diff --git a/src/ATBAPP/ATBDeviceControllerPlugin.h b/src/ATBAPP/ATBDeviceControllerPlugin.h
index 3f74bf0..9d99890 100644
--- a/src/ATBAPP/ATBDeviceControllerPlugin.h
+++ b/src/ATBAPP/ATBDeviceControllerPlugin.h
@@ -101,6 +101,12 @@ private:
 
    hwinf* hw;
 
+
+private slots:
+   void onPrintFinishedOK();
+   void onPrintFinishedERR();
+   void onGotCoin();
+
 };
 
 #endif // ATBDEVICECONTROLLERPLUGIN_H