text: """
  Support for VOC.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/binary_sensor.volvooncall/
  """
  import logging
  
  from homeassistant.components.volvooncall import VolvoEntity
  from homeassistant.components.binary_sensor import BinarySensorDevice
  
  _LOGGER = logging.getLogger(__name__)
  
  
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """Set up the Volvo sensors."""
      if discovery_info is None:
          return
      add_devices([VolvoSensor(hass, *discovery_info)])
  
  
  class VolvoSensor(VolvoEntity, BinarySensorDevice):
      """Representation of a Volvo sensor."""
  
      @property
      def is_on(self):
          """Return True if the binary sensor is on."""
          val = getattr(self.vehicle, self._attribute)
          if self._attribute == 'bulb_failures':
              return bool(val)
          if self._attribute in ['doors', 'windows']:
              return any([val[key] for key in val if 'Open' in key])
          return val != 'Normal'
  
      @property
      def device_class(self):
          """Return the class of this sensor, from DEVICE_CLASSES."""
          return 'safety'
  