diff --git a/include/etl/state_machine.h b/include/etl/state_machine.h
deleted file mode 100644
index cf9727df..00000000
--- a/include/etl/state_machine.h
+++ /dev/null
@@ -1,154 +0,0 @@
-/******************************************************************************
-The MIT License(MIT)
-
-Embedded Template Library.
-https://github.com/ETLCPP/etl
-https://www.etlcpp.com
-
-Copyright(c) 2018 jwellbelove
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files(the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions :
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-******************************************************************************/
-
-#ifndef ETL_LWFSM_INCLUDED
-#define ETL_LWFSM_INCLUDED
-
-#include <stdint.h>
-
-#include "etl/nullptr.h"
-
-namespace etl
-{
-  //***************************************************************************
-  /// Light Weight Finite State Machine
-  //***************************************************************************
-  template <typename TObject>
-  class state_machine
-  {
-  public:
-
-    typedef uint32_t state_id_t;
-    typedef uint32_t event_id_t;
-
-    //*************************************************************************
-    /// Transition definition
-    //*************************************************************************
-    struct transition
-    {
-      transition(event_id_t event_,
-                 state_id_t current_state_,
-                 state_id_t next_state_,
-                 void (TObject::*action_)(),
-                 bool (TObject::*condition_)()  = nullptr)
-        : event(event_),
-          current_state(current_state_),
-          nextState(next_state_),
-          action(action_),
-          condition(condition_)
-      {
-      }
-
-      event_id_t event;
-      state_id_t current_state;
-      state_id_t nextState;
-      void (TObject::*action)();
-      bool (TObject::*condition)();
-    };
-
-    //*************************************************************************
-    ///
-    //*************************************************************************
-    state_machine(TObject& object_)
-      : object(object_)
-    {
-    }
-
-    //*************************************************************************
-    ///
-    //*************************************************************************
-    state_machine(TObject& object_, state_id_t state_)
-      : object(object_),
-        current_state(state_)
-    {
-    }
-
-    //*************************************************************************
-    ///
-    //*************************************************************************
-    template <const uint32_t TRANSITION_TABLE_SIZE>
-    void set_transition_table(transition<TObject>(&transition_table_)[TRANSITION_TABLE_SIZE])
-    {
-      transition_table      = &transition_table_[0];
-      transition_table_size = TRANSITION_TABLE_SIZE;
-    }
-
-    //*************************************************************************
-    ///
-    //*************************************************************************
-    void set_initial_state(state_id_t state)
-    {
-      current_state = state;
-    }
-
-    //*************************************************************************
-    ///
-    //*************************************************************************
-    state_id_t get_state() const
-    {
-      return current_state;
-    }
-
-    //*************************************************************************
-    ///
-    //*************************************************************************
-    void process_event(event_id_t event)
-    {
-      bool handled = false;
-
-      // Scan the transition table.
-      for (uint32_t i = 0; (i < transition_table_size) && (handled == false); ++i)
-      {
-        transition<TObject>& transition = transition_table[i];
-
-        // Matching event and state?
-        if ((transition.event == event) && (transition.current_state == current_state))
-        {
-          // Shall we execute the transition?
-          bool do_transition = (transition.condition == nullptr) || ((object.*transition.condition)());
-
-          if (do_transition)
-          {
-            (object.*transition.action)();
-            current_state = transition.next_state;
-            handled = true;
-          }
-        }
-      }
-    }
-
-  private:
-
-    state_id_t           current_state;         ///< The current state id.
-    TObject&             object;                ///< The object that supplies codition and action member functions
-    transition<TObject>* transition_table;      ///< The table of transitions.
-    uint32_t             transition_table_size; ///< The size of the transition table.
-  };
-}
-
-#endif
\ No newline at end of file