text: """
  This component provides HA sensor support for Amcrest IP cameras.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/sensor.amcrest/
  """
  import asyncio
  from datetime import timedelta
  import logging
  
  from homeassistant.components.amcrest import DATA_AMCREST, SENSORS
  from homeassistant.helpers.entity import Entity
  from homeassistant.const import CONF_NAME, CONF_SENSORS, STATE_UNKNOWN
  
  DEPENDENCIES = ['amcrest']
  
  _LOGGER = logging.getLogger(__name__)
  
  SCAN_INTERVAL = timedelta(seconds=10)
  
  
  @asyncio.coroutine
  def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
      """Set up a sensor for an Amcrest IP Camera."""
      if discovery_info is None:
          return
  
      device_name = discovery_info[CONF_NAME]
      sensors = discovery_info[CONF_SENSORS]
      amcrest = hass.data[DATA_AMCREST][device_name]
  
      amcrest_sensors = []
      for sensor_type in sensors:
          amcrest_sensors.append(
              AmcrestSensor(amcrest.name, amcrest.device, sensor_type))
  
      async_add_devices(amcrest_sensors, True)
      return True
  
  
  class AmcrestSensor(Entity):
      """A sensor implementation for Amcrest IP camera."""
  
      def __init__(self, name, camera, sensor_type):
          """Initialize a sensor for Amcrest camera."""
          self._attrs = {}
          self._camera = camera
          self._sensor_type = sensor_type
          self._name = '{0}_{1}'.format(name,
                                        SENSORS.get(self._sensor_type)[0])
          self._icon = 'mdi:{}'.format(SENSORS.get(self._sensor_type)[2])
          self._state = STATE_UNKNOWN
  
      @property
      def name(self):
          """Return the name of the sensor."""
          return self._name
  
      @property
      def state(self):
          """Return the state of the sensor."""
          return self._state
  
      @property
      def device_state_attributes(self):
          """Return the state attributes."""
          return self._attrs
  
      @property
      def icon(self):
          """Icon to use in the frontend, if any."""
          return self._icon
  
      @property
      def unit_of_measurement(self):
          """Return the units of measurement."""
          return SENSORS.get(self._sensor_type)[1]
  
      def update(self):
          """Get the latest data and updates the state."""
          _LOGGER.debug("Pulling data from %s sensor.", self._name)
  
          try:
              version, build_date = self._camera.software_information
              self._attrs['Build Date'] = build_date.split('=')[-1]
              self._attrs['Version'] = version.split('=')[-1]
          except ValueError:
              self._attrs['Build Date'] = 'Not Available'
              self._attrs['Version'] = 'Not Available'
  
          try:
              self._attrs['Serial Number'] = self._camera.serial_number
          except ValueError:
              self._attrs['Serial Number'] = 'Not Available'
  
          if self._sensor_type == 'motion_detector':
              self._state = self._camera.is_motion_detected
              self._attrs['Record Mode'] = self._camera.record_mode
  
          elif self._sensor_type == 'ptz_preset':
              self._state = self._camera.ptz_presets_count
  
          elif self._sensor_type == 'sdcard':
              sd_used = self._camera.storage_used
              sd_total = self._camera.storage_total
              self._attrs['Total'] = '{0} {1}'.format(*sd_total)
              self._attrs['Used'] = '{0} {1}'.format(*sd_used)
              self._state = self._camera.storage_used_percent
  