anchor.diff:      stop(rotate_right),
       firmata:stop().
   
  +emergency_stop(Device) ->
  +    setup(Device),
  +    stop(forward),
  +    firmata:stop().
  +
   % Private API
   
   setup(Device) ->
  
positive.code: -module(bot).
  -export([start/1, test/1]).
  -define(PING, 7).
  -define(PWM_LEFT, 3).
  -define(PWM_RIGHT, 11).
  
negative.code: -define(SLEEP, 10).
  -define(STOP_SLEEP, 30).
  -define(TEST_SLEEP, 3000).
  -define(CHANGE_SLEEP, 500).
  -define(FWD_SPEED, 255).
  -define(BWD_SPEED, 200).
  -define(ROTATE_SPEED, 200).
  