text: """Support for MySensors binary sensors."""
  from homeassistant.components import mysensors
  from homeassistant.components.binary_sensor import (
      DEVICE_CLASS_SAFETY,
      DEVICE_CLASS_SOUND,
      DEVICE_CLASS_VIBRATION,
      DEVICE_CLASSES,
      DOMAIN,
      BinarySensorEntity,
  )
  from homeassistant.const import STATE_ON
  
  SENSORS = {
      "S_DOOR": "door",
      "S_MOTION": "motion",
      "S_SMOKE": "smoke",
      "S_SPRINKLER": DEVICE_CLASS_SAFETY,
      "S_WATER_LEAK": DEVICE_CLASS_SAFETY,
      "S_SOUND": DEVICE_CLASS_SOUND,
      "S_VIBRATION": DEVICE_CLASS_VIBRATION,
      "S_MOISTURE": "moisture",
  }
  
  
  async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
      """Set up the mysensors platform for binary sensors."""
      mysensors.setup_mysensors_platform(
          hass,
          DOMAIN,
          discovery_info,
          MySensorsBinarySensor,
          async_add_entities=async_add_entities,
      )
  
  
  class MySensorsBinarySensor(mysensors.device.MySensorsEntity, BinarySensorEntity):
      """Representation of a MySensors Binary Sensor child node."""
  
      @property
      def is_on(self):
          """Return True if the binary sensor is on."""
          return self._values.get(self.value_type) == STATE_ON
  
      @property
      def device_class(self):
          """Return the class of this sensor, from DEVICE_CLASSES."""
          pres = self.gateway.const.Presentation
          device_class = SENSORS.get(pres(self.child_type).name)
          if device_class in DEVICE_CLASSES:
              return device_class
          return None
  