text: """
  Contains functionality to use a ZigBee device as a binary sensor.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/binary_sensor.zigbee/
  """
  import voluptuous as vol
  
  from homeassistant.components.binary_sensor import BinarySensorDevice
  from homeassistant.components.zigbee import (
      ZigBeeDigitalIn, ZigBeeDigitalInConfig, PLATFORM_SCHEMA)
  
  CONF_ON_STATE = 'on_state'
  
  DEFAULT_ON_STATE = 'high'
  DEPENDENCIES = ['zigbee']
  
  STATES = ['high', 'low']
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Optional(CONF_ON_STATE): vol.In(STATES),
  })
  
  
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """Setup the ZigBee binary sensor platform."""
      add_devices([ZigBeeBinarySensor(hass, ZigBeeDigitalInConfig(config))])
  
  
  class ZigBeeBinarySensor(ZigBeeDigitalIn, BinarySensorDevice):
      """Use ZigBeeDigitalIn as binary sensor."""
  
      pass
  