diff --git a/Software/WomoLin/board/simulation/build.sh b/Software/WomoLin/board/simulation/build.sh
index 13ae134..b61edec 100755
--- a/Software/WomoLin/board/simulation/build.sh
+++ b/Software/WomoLin/board/simulation/build.sh
@@ -3,8 +3,9 @@ rm -f simulation
 g++-8 -std=c++17 -Wall -Wpedantic -Werror -Os -o simulation \
 ../../lib/signal.cpp \
 ../../lib/protocol.cpp \
-../../lib/manager.cpp \
+../../lib/managerbase.cpp \
 ../../lib/unit.cpp \
+./hal/serial.cpp \
+./hal/unit.cpp \
 manager.cpp \
-serial.cpp \
 main.cpp
diff --git a/Software/WomoLin/board/simulation/include/serial.h b/Software/WomoLin/board/simulation/hal/include/serial.h
similarity index 93%
rename from Software/WomoLin/board/simulation/include/serial.h
rename to Software/WomoLin/board/simulation/hal/include/serial.h
index 0fc646a..902c759 100644
--- a/Software/WomoLin/board/simulation/include/serial.h
+++ b/Software/WomoLin/board/simulation/hal/include/serial.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "../../../lib/include/icommon.h"
+#include "../../../../lib/include/icommon.h"
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/Software/WomoLin/board/simulation/hal/include/unit.h b/Software/WomoLin/board/simulation/hal/include/unit.h
new file mode 100644
index 0000000..e0c1cad
--- /dev/null
+++ b/Software/WomoLin/board/simulation/hal/include/unit.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include "../../../../lib/include/unit.h"
+
+namespace womolin::board::simulation::hal::unit
+{
+
+   class Relay : public womolin::unit::Relay
+   {
+      public:
+         Relay( uint8_t relayId );
+         ~Relay() = default;
+
+      private:
+         uint8_t  relayId;
+   };
+
+}
diff --git a/Software/WomoLin/board/simulation/serial.cpp b/Software/WomoLin/board/simulation/hal/serial.cpp
similarity index 100%
rename from Software/WomoLin/board/simulation/serial.cpp
rename to Software/WomoLin/board/simulation/hal/serial.cpp
diff --git a/Software/WomoLin/board/simulation/hal/unit.cpp b/Software/WomoLin/board/simulation/hal/unit.cpp
new file mode 100644
index 0000000..4ee6a9c
--- /dev/null
+++ b/Software/WomoLin/board/simulation/hal/unit.cpp
@@ -0,0 +1,10 @@
+#include "include/unit.h"
+
+namespace womolin::board::simulation::hal::unit
+{
+   Relay::Relay( uint8_t relayId ) 
+      : womolin::unit::Relay()
+      , relayId( relayId )
+   {
+   }
+}
diff --git a/Software/WomoLin/board/simulation/main.cpp b/Software/WomoLin/board/simulation/main.cpp
index d16174c..e458bb3 100644
--- a/Software/WomoLin/board/simulation/main.cpp
+++ b/Software/WomoLin/board/simulation/main.cpp
@@ -1,7 +1,5 @@
-#include "include/manager.h"
-#include "include/serial.h"
-
-#include "../../lib/include/protocol.h"
+#include "hal/include/serial.h"
+#include "manager.h"
 
 #include <iostream>
 #include <thread>
@@ -12,8 +10,7 @@ int main(int argc, char *argv[]) {
    std::cout << "Wilkommen Board Simulation" << std::endl;
 
    auto serial = womolin::board::simulation::Serial();
-   auto protocol = womolin::protocol::Protocol();
-   auto manager = womolin::board::simulation::Manager( serial, protocol );
+   auto manager = womolin::board::simulation::Manager( serial );
 
    while( true ) {
       manager.doWork();
diff --git a/Software/WomoLin/board/simulation/manager.cpp b/Software/WomoLin/board/simulation/manager.cpp
index 3d946d6..dd70888 100644
--- a/Software/WomoLin/board/simulation/manager.cpp
+++ b/Software/WomoLin/board/simulation/manager.cpp
@@ -1,15 +1,16 @@
-#include "include/manager.h"
+#include "manager.h"
+#include "hal/include/unit.h"
 
 namespace womolin::board::simulation
 {
-   Manager::Manager( womolin::lib::common::interface::ISerial & serial, 
-                     womolin::lib::common::interface::IProtocol & protocol )
-      : ManagerBase( serial, protocol )
+   Manager::Manager( womolin::lib::common::interface::ISerial & serial )
+      : ManagerBase( serial )
 
    {
       // generated code
       signalVector["licht_an_aus"] = &licht_an_aus;
-      //licht_an_aus.AddUnit( &RELAY1 );
+      auto RELAY1 = womolin::board::simulation::hal::unit::Relay( 1u );
+      licht_an_aus.AddUnit( &RELAY1 );
    }
 
 }
diff --git a/Software/WomoLin/board/simulation/include/manager.h b/Software/WomoLin/board/simulation/manager.h
similarity index 72%
rename from Software/WomoLin/board/simulation/include/manager.h
rename to Software/WomoLin/board/simulation/manager.h
index d7fe7a8..c17a8a7 100644
--- a/Software/WomoLin/board/simulation/include/manager.h
+++ b/Software/WomoLin/board/simulation/manager.h
@@ -1,14 +1,14 @@
 #pragma once
 
-#include "../../../lib/include/manager.h"
-#include "../../../lib/include/signal.h"
+#include "../../lib/include/managerbase.h"
+#include "../../lib/include/signal.h"
 
 namespace womolin::board::simulation
 {
    class Manager : public womolin::manager::ManagerBase 
    {
       public:
-         Manager( womolin::lib::common::interface::ISerial & serial, womolin::lib::common::interface::IProtocol & protocol );
+         Manager( womolin::lib::common::interface::ISerial & serial );
          ~Manager() = default;
 
       private:
diff --git a/Software/WomoLin/lib/include/icommon.h b/Software/WomoLin/lib/include/icommon.h
index 144de33..160d561 100644
--- a/Software/WomoLin/lib/include/icommon.h
+++ b/Software/WomoLin/lib/include/icommon.h
@@ -5,15 +5,6 @@
 namespace womolin::lib::common::interface
 {
 
-   class IProtocol
-   {
-      public:
-         virtual ~IProtocol() = default;
-
-         virtual void 
-         getKeyValue(const std::string & input, std::string & key, std::string & value) = 0;
-   };
-
    class ISerial
    {
       public:
diff --git a/Software/WomoLin/lib/include/manager.h b/Software/WomoLin/lib/include/managerbase.h
similarity index 65%
rename from Software/WomoLin/lib/include/manager.h
rename to Software/WomoLin/lib/include/managerbase.h
index f4f2c80..2f392ca 100644
--- a/Software/WomoLin/lib/include/manager.h
+++ b/Software/WomoLin/lib/include/managerbase.h
@@ -2,6 +2,7 @@
 
 #include "icommon.h"
 #include "signal.h"
+#include "protocol.h"
 
 #include <map>
 
@@ -10,18 +11,18 @@ namespace womolin::manager
    class ManagerBase
    {
       public:
-         ManagerBase( womolin::lib::common::interface::ISerial & serial, womolin::lib::common::interface::IProtocol & protocol );
+         ManagerBase( womolin::lib::common::interface::ISerial & serial );
          ~ManagerBase() = default;
 
          void doWork();
 
       protected:
-         std::string                                           message;
-         std::map<std::string, womolin::lib::common::interface::ISignal*>   signalVector;
+         std::string                                                          message;
+         std::map<std::string, womolin::lib::common::interface::ISignal*>     signalVector;
 
       private:
          womolin::lib::common::interface::ISerial &    serial;
-         womolin::lib::common::interface::IProtocol &  protocol;
+         womolin::protocol::Protocol                   protocol;
 
    };
 }
diff --git a/Software/WomoLin/lib/include/protocol.h b/Software/WomoLin/lib/include/protocol.h
index 41e6f12..ba1e089 100644
--- a/Software/WomoLin/lib/include/protocol.h
+++ b/Software/WomoLin/lib/include/protocol.h
@@ -4,15 +4,15 @@
 
 namespace womolin::protocol
 {
-   class Protocol : public womolin::lib::common::interface::IProtocol
+   class Protocol 
    {
       public:
          Protocol() = default;
-         virtual ~Protocol() = default;
+         ~Protocol() = default;
 
          void getKeyValue(const std::string & input, 
-                                std::string & key, 
-                                std::string & value) override final;
+                          std::string & key, 
+                          std::string & value);
          
    };
 
diff --git a/Software/WomoLin/lib/manager.cpp b/Software/WomoLin/lib/managerbase.cpp
similarity index 67%
rename from Software/WomoLin/lib/manager.cpp
rename to Software/WomoLin/lib/managerbase.cpp
index d035ddc..67923f6 100644
--- a/Software/WomoLin/lib/manager.cpp
+++ b/Software/WomoLin/lib/managerbase.cpp
@@ -1,12 +1,11 @@
-#include "include/manager.h"
+#include "include/managerbase.h"
 
 namespace womolin::manager
 {
    ManagerBase::ManagerBase( 
-      womolin::lib::common::interface::ISerial & serial, 
-      womolin::lib::common::interface::IProtocol & protocol )
-      : serial(serial)
-      , protocol(protocol)
+      womolin::lib::common::interface::ISerial & serial )
+      : serial( serial )
+      , protocol ( womolin::protocol::Protocol() )
    {
 
    }