diff --git a/BionxControl.pro b/BionxControl.pro
index 0bc7ece..3706654 100644
--- a/BionxControl.pro
+++ b/BionxControl.pro
@@ -1,4 +1,4 @@
-QT       += core gui
+QT       += core gui svg
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
@@ -12,7 +12,8 @@ QMAKE_CXXFLAGS += -std=c++23
 
 INCLUDEPATH += .  libwin
 
-linux:contains(QT_ARCH, arm.*) {
+linux:contains(QT_ARCH, arm.*)
+{
     message("Konfiguration für Raspberry Pi (ARM) erkannt.")
 
     # 1. Header-Dateien (z.B. für bcm2835.h oder eigene Treiber)
diff --git a/bcdeviceview.cpp b/bcdeviceview.cpp
index c3b1d29..790f1be 100644
--- a/bcdeviceview.cpp
+++ b/bcdeviceview.cpp
@@ -45,12 +45,16 @@ BCDeviceView::BCDeviceView(QWidget *parent)
   _itemDelegate = new BCAnimatedDelegate( _valueModel.getValueList(), this);
   setItemDelegate( _itemDelegate );
 
+  qDebug() << " --- View size I: " << this->size();
+
 }
 
 
 
 void BCDeviceView::setDeviceID( BCDevice::ID deviceID )
 {
+  qDebug() << " --- View size II: " << this->size();
+
   _devideID = deviceID;
 }
 
diff --git a/bcdriver.cpp b/bcdriver.cpp
index b3662ff..4e3c8c1 100644
--- a/bcdriver.cpp
+++ b/bcdriver.cpp
@@ -36,6 +36,9 @@
 #include <bcdriver.h>
 
 
+/**
+ * @brief Gibt den Treiberstatus zurück.
+ */
 
 BCDriver::DriverState BCDriver::getDriverState() const
 {
@@ -63,6 +66,9 @@ BCDriver::DriverStateResult BCDriverDummy::loadAndStartDriver()
 /// -----------------------------------------------------------------------------------
 /// -----------------------------------------------------------------------------------
 
+/**
+ * @brief Gibt ein Zufallsbyte zurück.
+ */
 
 TransmitResult BCDriverDummy::readRawByte( uint32_t deviceID, uint8_t registerID ) const
 {
@@ -73,6 +79,11 @@ TransmitResult BCDriverDummy::readRawByte( uint32_t deviceID, uint8_t registerID
   return myRandomByte;
 }
 
+
+/**
+ * @brief Simuliert erfolgreiches scheiben. Tut nix.
+ */
+
 TransmitResult BCDriverDummy::writeRawByte( uint32_t deviceID, uint8_t registerID, uint8_t value ) const
 {
   Q_UNUSED(deviceID)
diff --git a/bcdriver.h b/bcdriver.h
index 0d24f3e..81415d6 100644
--- a/bcdriver.h
+++ b/bcdriver.h
@@ -37,36 +37,6 @@
 #include <expected>
 #include <bcvalue.h>
 
-/*
-int32_t   CanInitDriver(char *options);
-void      CanDownDriver(void);
-int32_t   CanSetOptions(char *options);
-int32_t   CanDeviceOpen(uint32_t index, char *parameter);
-int32_t   CanDeviceClose(uint32_t index);
-
-int32_t   CanSetMode(uint32_t index, unsigned char can_op_mode, uint16_t can_command);
-
-int32_t   CanTransmit(uint32_t index, struct TCanMsg *msg, int32_t count);
-void      CanTransmitClear(uint32_t index);
-uint32_t  CanTransmitGetCount(uint32_t index);
-int32_t   CanTransmitSet(uint32_t index, uint16_t  cmd, uint32_t  time);
-int32_t   CanReceive(uint32_t index, struct TCanMsg *msg, int32_t count);
-void      CanReceiveClear(uint32_t index);
-uint32_t  CanReceiveGetCount(uint32_t index);
-
-int32_t   CanSetSpeed(uint32_t index, uint16_t speed);
-int32_t   CanSetSpeedUser(uint32_t index, uint32_t value);
-char*     CanDrvInfo(void);
-char*     CanDrvHwInfo(uint32_t index);
-int32_t   CanSetFilter(uint32_t index, struct TMsgFilter *msg_filter);
-int32_t   CanGetDeviceStatus(uint32_t index, struct TDeviceStatus *status);
-void      CanSetPnPEventCallback(void (DRV_CALLBACK_TYPE *event)(uint32_t index, int32_t status));
-void      CanSetStatusEventCallback(void (DRV_CALLBACK_TYPE *event)  (uint32_t  index, struct TDeviceStatus *device_status) );
-void      CanSetRxEventCallback(void (DRV_CALLBACK_TYPE *event)(uint32_t index,  struct TCanMsg *msg, int32_t count) );
-
-void      CanSetEvents( uint16_t  events );
-uint32_t  CanEventStatus(void);
-*/
 
 struct CBCItem;
 class  BCDriverStatus;
diff --git a/bcdrivertinycan.cpp b/bcdrivertinycan.cpp
index 4461173..33e4179 100644
--- a/bcdrivertinycan.cpp
+++ b/bcdrivertinycan.cpp
@@ -37,12 +37,48 @@
 
 
 #if defined(Q_OS_WIN)
+  // Unter Windows steht der Treibername in der registry
   static const char* cMHS_DRIVERNAME = NULL;
 #elif defined(Q_OS_LINUX)
-// Linux-spezifischer Code (z.B. /proc Filesystem, D-Bus)
+  // Unter linux(artigen) muss der Treibername explizit mit übergeben werden
   static const char* cMHS_DRIVERNAME = "libmhstcan.so";
 #endif
 
+/*
+
+ // TinyCan C-Api
+ // -------------
+
+int32_t   CanInitDriver(char *options);
+void      CanDownDriver(void);
+int32_t   CanSetOptions(char *options);
+int32_t   CanDeviceOpen(uint32_t index, char *parameter);
+int32_t   CanDeviceClose(uint32_t index);
+
+int32_t   CanSetMode(uint32_t index, unsigned char can_op_mode, uint16_t can_command);
+
+int32_t   CanTransmit(uint32_t index, struct TCanMsg *msg, int32_t count);
+void      CanTransmitClear(uint32_t index);
+uint32_t  CanTransmitGetCount(uint32_t index);
+int32_t   CanTransmitSet(uint32_t index, uint16_t  cmd, uint32_t  time);
+int32_t   CanReceive(uint32_t index, struct TCanMsg *msg, int32_t count);
+void      CanReceiveClear(uint32_t index);
+uint32_t  CanReceiveGetCount(uint32_t index);
+
+int32_t   CanSetSpeed(uint32_t index, uint16_t speed);
+int32_t   CanSetSpeedUser(uint32_t index, uint32_t value);
+char*     CanDrvInfo(void);
+char*     CanDrvHwInfo(uint32_t index);
+int32_t   CanSetFilter(uint32_t index, struct TMsgFilter *msg_filter);
+int32_t   CanGetDeviceStatus(uint32_t index, struct TDeviceStatus *status);
+void      CanSetPnPEventCallback(void (DRV_CALLBACK_TYPE *event)(uint32_t index, int32_t status));
+void      CanSetStatusEventCallback(void (DRV_CALLBACK_TYPE *event)  (uint32_t  index, struct TDeviceStatus *device_status) );
+void      CanSetRxEventCallback(void (DRV_CALLBACK_TYPE *event)(uint32_t index,  struct TCanMsg *msg, int32_t count) );
+
+void      CanSetEvents( uint16_t  events );
+uint32_t  CanEventStatus(void);
+*/
+
 /**
  * @brief Destruktor. Entlädt den CAN-Bus Treiber wieder.
  */
@@ -76,8 +112,6 @@ BCDriver::DriverStateResult BCDriverTinyCan::loadDriver()
 {
   auto callLoadDriver = [&]() -> DriverStateResult
   {
-    qDebug() << " -- Hier!";
-    //if( ::LoadDriver( NULL ) < 0 )
     if( ::LoadDriver( cMHS_DRIVERNAME ) < 0 )
       return std::unexpected(QString("Driver Error: 'LoadDriver'"));
     _driverState = DriverState::Loaded;
@@ -126,19 +160,20 @@ BCDriver::DriverStateResult BCDriverTinyCan::loadDriver()
     .and_then( callInitDriver )
     .and_then( callOpenDevice );
 
-  // success:
-  if(newDriverState)
-  {
-    // return 'DriverState::Opened'
-    return _driverState;
-  }
-  // return driver error message,
-  // _driverState ist irgendwo unter DriverState::Opened
+  // in Fehlerfall ist der Errorstring gesetzt,
+  // der interne _driverstate ist
+  // irgendwo unter DriverState::Opened
   return newDriverState;
 
 }
 
-// __fix
+
+/**
+ * @brief Um mit dem Bionx eBike reden zu können, müssen wir
+ * die Console in den Slave-Mode setzen.
+ * @return Fehlerstring oder DriverState::DeviceReady
+ */
+
 BCDriver::DriverStateResult BCDriverTinyCan::setConsoleSlaveMode()
 {
 
@@ -164,7 +199,6 @@ BCDriver::DriverStateResult BCDriverTinyCan::setConsoleSlaveMode()
 
   unsigned int retry = cTimeOuts;
 
-
   do
   {
     writeRawByte( console, slaveFlag, 1 );
@@ -192,6 +226,7 @@ void BCDriverTinyCan::resetDriver()
   }
 }
 
+
 /**
  * @brief BCDriverTinyCan::readRawByte
  * Kapselt den Treiberzugiff über die legacy C-Api. Liest ein byte, gibt dieses im std::expected aber
diff --git a/bcguihelpers.cpp b/bcguihelpers.cpp
index 5894ca5..59358e8 100644
--- a/bcguihelpers.cpp
+++ b/bcguihelpers.cpp
@@ -32,16 +32,18 @@
 
 #include <bcguihelpers.h>
 
+
 BCThemeSwitchButton::BCThemeSwitchButton(QWidget *parent )
-  : QPushButton(parent), _isDarkMode(true)
+  : QPushButton(parent)
 {
-  // 1. Visuelles Setup: Flach, keine Ränder, Hand-Cursor
+  // Visuelles Setup: Flach, keine Ränder, Hand-Cursor
   setFlat(true);
   setCursor(Qt::PointingHandCursor);
   setFixedSize(24, 24); // Kleiner Footprint im StatusBar
 
   // CSS: Transparent, damit es sich nahtlos in den StatusBar einfügt
   // Schriftgröße etwas erhöhen, damit die Emojis gut erkennbar sind
+  /*
   setStyleSheet(R"(
             QPushButton {
                 border: none;
@@ -53,17 +55,30 @@ BCThemeSwitchButton::BCThemeSwitchButton(QWidget *parent )
                 border-radius: 24px;
             }
         )");
-
-  // 2. Initialer Status (Startet im Dark Mode -> zeigt Mond)
+  */
+  // Initialer Status (Startet im Dark Mode -> zeigt Mond)
   updateIcon();
 
-  // 3. Klick verbinden
   connect(this, &QPushButton::clicked, this, &BCThemeSwitchButton::toggle);
 }
 
 
+/**
+ * @brief Setzt den DarkMode
+ */
 
-void BCThemeSwitchButton::toggle()
+void BCThemeSwitchButton::setDarkMode( bool isDark )
+{
+  _isDarkMode = !isDark;
+  toggleMode();
+}
+
+
+/**
+ * @brief Schaltet den akutellen Mode um.
+ */
+
+void BCThemeSwitchButton::toggleMode()
 {
   _isDarkMode = !_isDarkMode;
   updateIcon();
@@ -71,13 +86,17 @@ void BCThemeSwitchButton::toggle()
 }
 
 
+/**
+ * @brief Icon & Tooltip anpassen
+ */
+
 void BCThemeSwitchButton::updateIcon()
 {
   // Logik:
   // Ist Dark Mode an? Zeige Mond (oder Sonne, je nach Geschmack).
   // Hier: Zeige das Symbol des AKTUELLEN Modus.
   setText(_isDarkMode ? "🌙" : "☀️");
-  setToolTip(_isDarkMode ? "Switch to Light Mode" : "Switch to Dark Mode");
+  setToolTip(_isDarkMode ? "Zum LightMode wechseln" : "Zum DarkMode wechseln");
 }
 
 
@@ -85,22 +104,20 @@ void BCThemeSwitchButton::updateIcon()
 /// -----------------------------------------------------------------------------------
 
 
-
+/**
+ * @brief Hilfswidget: Zeigt den DriverState als Icon an.
+ */
 
 BCDriverStateWidget::BCDriverStateWidget(QWidget* parent)
   : QWidget(parent)
 {
   QHBoxLayout* layout = new QHBoxLayout(this);
   layout->setContentsMargins(10, 2, 10, 2);
-  layout->setSpacing(8);
-
-  _label = new QLabel(this);
-  _label->setStyleSheet("font-weight: 500;"); // Medium weight
+  //layout->setSpacing(8);
 
   _led = new QLabel(this);
   _led->setFixedSize(12, 12);
 
-  layout->addWidget(_label);
   layout->addWidget(_led);
 
   // Startzustand
@@ -115,31 +132,11 @@ void BCDriverStateWidget::onDriverStateChanged(BCDriver::DriverState state, cons
 {
   _state = state;
   qDebug() << " --- StateWidget: " << state << " - " << customMessage;
-  // Standard-Texte, falls keine Nachricht übergeben wurde
-  QString text = customMessage;
-  if (text.isEmpty())
-  {
-    switch (_state)
-    {
-      case BCDriver::DriverState::DeviceReady:
-        text = "Device Ready";
-        break;
-
-      case BCDriver::DriverState::Error:
-        text = "Driver Error";
-        break;
-
-      default:
-        text = "Not Present";
-        break;
-    }
-  }
-  _label->setText(text);
 
   updateStyle();
 }
 
-
+/*
 void BCDriverStateWidget::updateStyle()
 {
   QString ledStyle;
@@ -181,8 +178,76 @@ void BCDriverStateWidget::updateStyle()
 
   setToolTip(toolTipText);
 }
-
-
-
+*/
+
+void BCDriverStateWidget::updateStyle()
+{
+  QString ledStyle;
+  QString toolTipText;
+  /*
+  NotPresent,
+    Error,
+    Loaded,
+    Initialized,
+    Opened,      // bis hierher: dll vorhanden, Treiber geladen
+    DeviceReady
+  */
+  switch (_state)
+  {
+  case BCDriver::DriverState::NotPresent:
+    // FLUENT GRAY (Neutral)
+    // Wir machen es dunkelgrau mit hellem Rand -> "Ausgeschaltet"-Look
+    ledStyle = "background-color: #3B3B3B; border: 1px solid #606060;";
+    toolTipText = "Treiber nicht geladen.";
+    break;
+
+  case BCDriver::DriverState::Error:
+    // FLUENT RED (Critical)
+    ledStyle = "background-color: #C42B1C; border: 1px solid #A80000;";
+    toolTipText = "Fehler beim Laden des Treibers.";
+    break;
+
+  // hier: dll vorhanden, Treiber geladen
+  case BCDriver::DriverState::Loaded:
+  case BCDriver::DriverState::Initialized:
+  case BCDriver::DriverState::Opened:
+    // FLUENT RED (Critical)
+    ledStyle = "background-color: #FF8C00; border: 1px solid #A80000;";
+    toolTipText = "Fehler beim Laden des Treibers.";
+    break;
+
+  case BCDriver::DriverState::DeviceReady:
+    // FLUENT GREEN (Success)
+    ledStyle = "background-color: #107C10; border: 1px solid #0E600E;";
+    toolTipText = "Verbindung erfolgreich hergestellt.";
+    break;
+
+  }
+
+  // Styles anwenden (immer rund machen)
+  _led->setStyleSheet(ledStyle + "border-radius: 6px;");
+
+  /*
+  // Textfarbe setzen
+  _setStyleSheet(QString("color: %1; font-weight: %2;")
+                           .arg(labelColor)
+                           .arg(_state == BCDriver::DriverState::DeviceReady ? "bold" : "normal"));
+  */
+  setToolTip(toolTipText);
+}
+
+void BCDriverStateWidget::mouseReleaseEvent(QMouseEvent* event)
+{
+  qDebug() << " --- RELAASE!";
+
+  if (event->button() == Qt::LeftButton)
+  {
+    qDebug() << " --- MOO?!";
+
+    emit clicked();
+  }
+
+  QWidget::mouseReleaseEvent(event);
+}
 
 
diff --git a/bcguihelpers.h b/bcguihelpers.h
index 4b2d480..8caca4a 100644
--- a/bcguihelpers.h
+++ b/bcguihelpers.h
@@ -36,10 +36,16 @@
 #include <QPushButton>
 #include <QLabel>
 #include <QHBoxLayout>
+#include <QMouseEvent>
 
 #include <bcdriver.h>
 
 
+/**
+ * @brief Einfaches Buttonwidget, um zwischen Dark- und Lightmode
+ * zu wechseln
+ */
+
 class BCThemeSwitchButton : public QPushButton
 {
   Q_OBJECT
@@ -47,6 +53,7 @@ class BCThemeSwitchButton : public QPushButton
 public:
 
   explicit BCThemeSwitchButton(QWidget *parent = nullptr);
+  void setDarkMode( bool isDark );
 
 signals:
 
@@ -54,13 +61,13 @@ signals:
 
 private slots:
 
-  void toggle();
+  void toggleMode();
 
 private:
 
   void updateIcon();
 
-  bool _isDarkMode;
+  bool _isDarkMode{false};
 
 };
 
@@ -70,6 +77,11 @@ private:
 /// -----------------------------------------------------------------------------------
 
 
+/**
+ * @brief Einfaches Widget, um den Zustand des TinyCan Native
+ * Drivers anzuzeigen.
+ */
+
 class BCDriverStateWidget : public QWidget
 {
   Q_OBJECT
@@ -84,12 +96,16 @@ public slots:
   // 'customMessage' ist optional. Wenn leer, wird ein Standardtext genommen.
   void onDriverStateChanged(BCDriver::DriverState state, const QString& customMessage = QString());
 
-private:
+signals:
+
+  void clicked();
+
+protected:
 
   void updateStyle();
+  void mouseReleaseEvent(QMouseEvent* event) override;
 
   QLabel*               _led;
-  QLabel*               _label;
   BCDriver::DriverState _state;
 
 };
diff --git a/bcmainwindow.cpp b/bcmainwindow.cpp
index 5f7353f..356effa 100644
--- a/bcmainwindow.cpp
+++ b/bcmainwindow.cpp
@@ -29,7 +29,7 @@
 
  ***************************************************************************/
 
-
+#include <QFile>
 #include <QTimer>
 
 #include "qassert.h"
@@ -119,6 +119,7 @@ void BCMainWindow::initMainWindow()
   configureAction(_batteryButton, _batteryAction, BCDevice::ID::Battery );
   //configureAction(_pimpButton,    _pimpAction,    BCDevice::ID::Pimp );
 
+
   /*
   bool m_isDarkMode = false;
   QString icon = m_isDarkMode ? "☀️" : "🌙";
@@ -165,23 +166,74 @@ void BCMainWindow::initMainWindow()
 
 }
 
+/*
+// 2. Bild für den Zustand UNCHECKED (Off) hinzufügen
+// Das ist das Symbol, wenn NICHT verbunden ist (z.B. ein Stecker)
+connectIcon.addFile(":/icons/plug_disconnected.svg", QSize(), QIcon::Normal, QIcon::Off);
+
+// 3. Bild für den Zustand CHECKED (On) hinzufügen
+// Das ist das Symbol, wenn verbunden IST (z.B. Stecker in Dose)
+connectIcon.addFile(":/icons/plug_connected.svg",    QSize(), QIcon::Normal, QIcon::On);
+*/
 
 void BCMainWindow::initStatusBar()
 {
   QStatusBar *statBar = statusBar();
 
-  BCDriverStateWidget* connector = new BCDriverStateWidget(this);
-  connect( &_transmitter, &BCTransmitter::driverStateChanged, connector, &BCDriverStateWidget::onDriverStateChanged );
-  statBar->addPermanentWidget(connector);
+  BCDriverStateWidget* conState = new BCDriverStateWidget(this);
+  connect( &_transmitter, &BCTransmitter::driverStateChanged, conState, &BCDriverStateWidget::onDriverStateChanged );
+  connect( conState, &BCDriverStateWidget::clicked, _connectAction, &QAction::trigger );
 
-  statBar->showMessage("Ready");
-  BCThemeSwitchButton *themeBtn = new BCThemeSwitchButton(this);
+  statBar->addPermanentWidget(conState);
+  conState->installEventFilter(this);
+
+  BCThemeSwitchButton* themeBtn = new BCThemeSwitchButton(this);
   statBar->addPermanentWidget(themeBtn);
   connect(themeBtn, &BCThemeSwitchButton::themeChanged, this, [this](bool isDark)
   {
     QString message = isDark ? "Dark Mode Activated" : "Light Mode Activated";
     statusBar()->showMessage( message, 3000);
+    setApplicationStyleSheet( isDark ? ":/claude_dark_mode.qss"_L1 : ":/claude_light_mode.qss"_L1 );
   });
+
+  // Wir starten im light mode
+  //themeBtn->setDarkMode( false );
+
+  statBar->showMessage("Ready");
+}
+
+/*
+bool BCMainWindow::eventFilter(QObject *obj, QEvent *event)
+{
+  if (obj == myWidget && event->type() == QEvent::MouseButtonRelease) {
+    QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);
+    if (mouseEvent->button() == Qt::LeftButton) {
+      myAction->trigger();
+      return true; // Event wurde verarbeitet
+    }
+  }
+  return QObject::eventFilter(obj, event);
+}
+*/
+
+/**
+ * @brief Setzt das Stylesheet, hier: Dark- oder Lightmode
+ * @param path Der Pfad zuum Stylesheet
+ * @return
+ */
+
+bool BCMainWindow::setApplicationStyleSheet( QAnyStringView path )
+{
+  QFile styleFile( path.toString() );
+  if (styleFile.open(QIODevice::ReadOnly | QIODevice::Text))
+  {
+    QString style = styleFile.readAll();
+    qApp->setStyleSheet(style);
+    styleFile.close();
+    return false;
+  }
+  qWarning() << "Konnte Stylesheet nicht laden:" << styleFile.errorString();
+  return true;
 }
 
 
@@ -195,6 +247,10 @@ void BCMainWindow::setHeaderLabel( const QString& headerText)
   _headerLabel->setText( "   BionxControl: " + headerText );
 }
 
+void BCMainWindow::onShowMessage( const QString& message, int timeOut )
+{
+  _statusbar->showMessage( message, timeOut );
+}
 
 void BCMainWindow::autoConnect()
 {
diff --git a/bcmainwindow.h b/bcmainwindow.h
index 4dda74c..3b0bddc 100644
--- a/bcmainwindow.h
+++ b/bcmainwindow.h
@@ -60,10 +60,12 @@ public slots:
   void onConnectButtonToggled(bool active );
   void onDriverStateChanged( BCDriver::DriverState state, const QString& message="" );
 
-  // Slots für Rückmeldungen vom Runner
+  // Slots für Rückmeldungen vom Transmitter
   void onValueUpdated( BCDevice::ID deviceID, int index, BCValue::State state, const QString& newValue="" );
   void onSyncDeviceView();
 
+  void onShowMessage( const QString& message, int timeOut=3000);
+
 signals:
 
   // Internes Signal, um Daten an den Worker Thread zu senden
@@ -71,10 +73,13 @@ signals:
 
 protected:
 
+  bool setApplicationStyleSheet( QAnyStringView path );
   void initMainWindow();
   void initStatusBar();
   void autoConnect();
 
+  //bool eventFilter(QObject *obj, QEvent *event) override;
+
   BCXmlLoader _dataManager;
 
   // Wir brauchen eine Verbindung zwischen den Views
diff --git a/bcmainwindow.ui b/bcmainwindow.ui
index c2af381..71e4ac3 100644
--- a/bcmainwindow.ui
+++ b/bcmainwindow.ui
@@ -19,6 +19,9 @@
   <property name="windowTitle">
    <string/>
   </property>
+  <property name="styleSheet">
+   <string notr="true"/>
+  </property>
   <widget class="QWidget" name="_centralwidget">
    <layout class="QVBoxLayout" name="verticalLayout">
     <item>
@@ -169,13 +172,6 @@
            </property>
           </widget>
          </item>
-         <item>
-          <widget class="QPushButton" name="fitzeButton">
-           <property name="text">
-            <string>Fitze</string>
-           </property>
-          </widget>
-         </item>
         </layout>
        </widget>
       </item>
@@ -318,7 +314,11 @@
     </item>
    </layout>
   </widget>
-  <widget class="QStatusBar" name="_statusbar"/>
+  <widget class="QStatusBar" name="_statusbar">
+   <property name="styleSheet">
+    <string notr="true">background-color: #DADADA</string>
+   </property>
+  </widget>
   <action name="_pimpAction">
    <property name="checkable">
     <bool>true</bool>
diff --git a/bctransmitter.cpp b/bctransmitter.cpp
index af9150b..b2c473c 100644
--- a/bctransmitter.cpp
+++ b/bctransmitter.cpp
@@ -44,11 +44,9 @@ BCTransmitter::BCTransmitter(QObject *parent)
 {
   //_canDriver = new BCDriverTinyCan{this};
   _canDriver = &_dummyDriver;
-
 }
 
 
-
 /**
  * @brief Steuert die Verbindung mit dem 'echten' CAN-Bus Treiber.
  * @param connect true:  Vesuche den CAN-Bus Treiber zu laden und zu verbinden
@@ -59,6 +57,10 @@ void BCTransmitter::onToggleDriverConnection( bool connect )
 {
   qDebug() << " --- onToggleDriverConnection: " << connect;
   // FIX! Ende der current op abwarten!
+  BCDriver::DriverState state = connect ? BCDriver::DriverState::DeviceReady : BCDriver::DriverState::NotPresent;
+  const QString& message = connect ? "Trying to connect" : " FAILED";
+  emit driverStateChanged(state, message);
+  return;
 
   // Hier sind wir noch in GUI Thread
   QMutexLocker locker(&_mutex);
@@ -69,7 +71,7 @@ void BCTransmitter::onToggleDriverConnection( bool connect )
 }
 
 
-void BCTransmitter::onStartNativeDirver()
+void BCTransmitter::onStartNativeDriver()
 {
 
 }
diff --git a/bctransmitter.h b/bctransmitter.h
index f47e58c..8eb0265 100644
--- a/bctransmitter.h
+++ b/bctransmitter.h
@@ -65,7 +65,7 @@ public slots:
   void onToggleDriverConnection( bool connect );
   void onEnqueueValue(BCValuePtrConst value );
   void onProcessValue();
-  void onStartNativeDirver();
+  void onStartNativeDriver();
 
 signals:
 
diff --git a/doc/Challenges.docx b/doc/Challenges.docx
index b0c3d6f..32177f2 100644
Binary files a/doc/Challenges.docx and b/doc/Challenges.docx differ
diff --git a/main.cpp b/main.cpp
index 14005cb..55f1a37 100644
--- a/main.cpp
+++ b/main.cpp
@@ -39,32 +39,15 @@
 
 #include <bcmainwindow.h>
 
-#include <expected>
-#include <iostream>
 
 
 
 
-bool setApplicationStyleSheet( QAnyStringView path )
-{
-  QFile styleFile( path.toString() );
-  if (styleFile.open(QIODevice::ReadOnly | QIODevice::Text))
-  {
-    QString style = styleFile.readAll();
-    qApp->setStyleSheet(style);
-    styleFile.close();
-    return true;
-  }
-  qWarning() << "Konnte Stylesheet nicht laden:" << styleFile.errorString();
-  return true;
-}
-
 int main(int argc, char *argv[])
 {
 
   QApplication app(argc, argv);
-  //setApplicationStyleSheet( ":/claude_light_mode.qss"_L1 );
-  /*
+   /*
   app.setStyleSheet(R"(
             QWidget {
                 background-color: #F3F3F3;