def is_song_playing(self): return binary_response(self._read_sensor_data(37))
def virtual_wall(self): return binary_response(self._read_sensor_data(13))
def cliff_right(self): return binary_response(self._read_sensor_data(12))
def cliff_front_left(self): return binary_response(self._read_sensor_data(10))
def cliff_left(self): return binary_response(self._read_sensor_data(9))
def wall_sensor(self): return binary_response(self._read_sensor_data(8))