diff --git a/bcdriver.cpp b/bcdriver.cpp
index 5845e4d..a3a6bb0 100644
--- a/bcdriver.cpp
+++ b/bcdriver.cpp
@@ -31,6 +31,7 @@
 
 
 #include <QDebug>
+#include <QRandomGenerator>
 
 #include <bcdriver.h>
 
@@ -93,4 +94,45 @@ void BCDriver::onStartDriver()
 
 }
 
+/// -----------------------------------------------------------------------------------
+/// -----------------------------------------------------------------------------------
+
+/**
+ * @brief BCDriverDummy::BCDriverDummy
+ * @param parent
+ */
+
+BCDriverDummy::BCDriverDummy( QObject* parent )
+  : BCDriver(parent)
+{
+}
+
+BCDriver::DriverState BCDriverDummy::loadDriver()
+{
+  return BCDriver::DriverState::Ready;
+}
+BCDriver::DriverState BCDriverDummy::initDriver()
+{
+  return DriverState::Ready;
+}
+
+uint32_t BCDriverDummy::readRawByte( uint32_t deviceID, uint8_t registerID ) const
+{
+  //if( getState() != DriverState::Ready)
+  //  throw BCException( "readRawValue error: driver not loaded." );
+
+  uint32_t myRandomByte = static_cast<uint32_t>(QRandomGenerator::global()->bounded(256));
+  return myRandomByte;
+
+}
+
+void BCDriverDummy::writeRawByte( uint32_t deviceID, uint8_t registerID, uint8_t value ) const
+{
+  if( getState() != DriverState::Ready)
+    throw BCException( "readRawValue error: driver not loaded." );
+
+  qDebug() << " --- BCDriverTinyCan writeRawValue: " << value;
+  return;
+}
+
 
diff --git a/bcdriver.h b/bcdriver.h
index 096b671..afd3f48 100644
--- a/bcdriver.h
+++ b/bcdriver.h
@@ -130,8 +130,23 @@ protected:
 
   DriverState _driverState{DriverState::NotPresent};
 
-  static constexpr int cRetries  =  5;
-  static constexpr int cTimeOuts = 20;
+};
+
+
+class BCDriverDummy : public BCDriver
+{
+  Q_OBJECT
+
+public:
+
+
+  explicit BCDriverDummy( QObject* parent = nullptr );
+
+  DriverState loadDriver() override;
+  DriverState initDriver() override;
+
+  uint32_t readRawByte( uint32_t deviceID, uint8_t registerID ) const override;
+  void     writeRawByte( uint32_t deviceID, uint8_t registerID, uint8_t value ) const override;
 
 };
 
diff --git a/bcdrivertinycan.cpp b/bcdrivertinycan.cpp
index d7095f1..277b722 100644
--- a/bcdrivertinycan.cpp
+++ b/bcdrivertinycan.cpp
@@ -31,7 +31,7 @@
 
 
 #include <QDebug>
-#include <QRandomGenerator>
+
 
 #include <bcdrivertinycan.h>
 #include <can_drv.h>
@@ -143,9 +143,6 @@ BCDriver::DriverState BCDriverTinyCan::initDriver()
 uint32_t BCDriverTinyCan::readRawByte( uint32_t deviceID, uint8_t registerID ) const
 {
 
-  uint32_t myRandomByte = static_cast<uint32_t>(QRandomGenerator::global()->bounded(256));
-  return myRandomByte;
-
   if( getState() != DriverState::Ready)
     throw BCException( "readRawValue error: driver not loaded." );
 
@@ -155,8 +152,6 @@ uint32_t BCDriverTinyCan::readRawByte( uint32_t deviceID, uint8_t registerID ) c
 
   TCanMsg msg;
 
-
-
   // msg verpacken
   msg.MsgFlags = 0L;
   msg.Id = deviceID;
@@ -223,7 +218,6 @@ void BCDriverTinyCan::writeRawByte( uint32_t deviceID, uint8_t registerID ,uint8
   qDebug() << " --- BCDriverTinyCan writeRawValue: " << value;
   return;
 
-
   struct TCanMsg msg;
   int timeout_count = cTIMEOUT_COUNT;
 
diff --git a/bcdrivertinycan.h b/bcdrivertinycan.h
index cb86e08..49a19a0 100644
--- a/bcdrivertinycan.h
+++ b/bcdrivertinycan.h
@@ -64,6 +64,10 @@ protected:
   const char* CBCDLL_LIN = "libmhstcan.so";
   const char* CBCDLL_WIN = "mhstcan.dll";
 
+
+  static constexpr int cRetries  =  5;
+  static constexpr int cTimeOuts = 20;
+
   static constexpr int   cTIMEOUT_MS    = 10; // 10ms
   static constexpr int   cTIMEOUT_COUNT = 10;
 
diff --git a/bctransmitter.cpp b/bctransmitter.cpp
index 9c73d26..d5a501a 100644
--- a/bctransmitter.cpp
+++ b/bctransmitter.cpp
@@ -35,10 +35,11 @@
 
 #include <bctransmitter.h>
 
-
 BCTransmitter::BCTransmitter(QObject *parent)
   : QObject(parent), _isBusy(false)
 {
+  //_canDriver = new BCDriverTinyCan{this};
+  _canDriver = new BCDriverDummy{this};
 }
 
 
@@ -46,11 +47,11 @@ void BCTransmitter::onToggleConnectionState( bool connect )
 {
   if( connect )
   {
-    if( _canDriver.getState() != BCDriver::DriverState::Ready )
-      _canDriver.onStartDriver();
+    if( _canDriver->getState() != BCDriver::DriverState::Ready )
+      _canDriver->onStartDriver();
 
     // fix!
-    uint32_t hwVersion = _canDriver.readRawByte( (uint32_t)BCDevice::ID::Console, (uint8_t)BC::ID::Cons_Rev_Hw);
+    uint32_t hwVersion = _canDriver->readRawByte( (uint32_t)BCDevice::ID::Console, (uint8_t)BC::ID::Cons_Rev_Hw);
 
     if(!hwVersion)
     {
@@ -158,7 +159,7 @@ uint32_t BCTransmitter::readRawByte(  uint32_t deviceID, uint8_t registerID  ) c
   uint32_t result{};
   try
   {
-    result = _canDriver.readRawByte( deviceID, registerID );
+    result = _canDriver->readRawByte( deviceID, registerID );
   }
   catch ( BCException& exception )
   {    
@@ -172,7 +173,7 @@ void BCTransmitter::writeRawByte( uint32_t deviceID, uint8_t registerID , uint8_
 {
   try
   {
-    _canDriver.writeRawByte( deviceID, registerID, value );
+    _canDriver->writeRawByte( deviceID, registerID, value );
   }
   catch ( BCException& exception )
   {
diff --git a/bctransmitter.h b/bctransmitter.h
index b0e0f58..45c5eea 100644
--- a/bctransmitter.h
+++ b/bctransmitter.h
@@ -72,7 +72,8 @@ private:
   QMutex       _mutex;
   std::atomic<bool> _isBusy{ false };
 
-  BCDriverTinyCan _canDriver;
+  BCDriver* _canDriver{};
+
 };