anchor.diff:  	 start/2,
   	 start/3,
   	 state/0,
  +	 update_handler/1,
   	 exit/0,
   	 quit_cooja/1,
   	 %% simulation
  
positive.code: 	 simulation_time_ms/1,
  	 simulation_step_ms/1,
  	 simulation_step/2,
  	 %% radio
  	 radio_set_config/2,
  	 radio_get_config/1,
  
negative.code: 	    end;
  	{state, P} ->
  	    P ! {running, Handler},
  	    handle_requests(Handler);
  	{handler, NewHandler} ->
  	    handle_requests(NewHandler)
      end.
  
  command_fun(CoojaPath, Cmd, PrintOutput) ->
  