text: """
  Support for Netgear routers.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/device_tracker.netgear/
  """
  import logging
  
  import voluptuous as vol
  
  import homeassistant.helpers.config_validation as cv
  from homeassistant.components.device_tracker import (
      DOMAIN, PLATFORM_SCHEMA, DeviceScanner)
  from homeassistant.const import (
      CONF_HOST, CONF_PASSWORD, CONF_USERNAME, CONF_PORT)
  
  REQUIREMENTS = ['pynetgear==0.3.3']
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_HOST = 'routerlogin.net'
  DEFAULT_USER = 'admin'
  DEFAULT_PORT = 5000
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Optional(CONF_HOST, default=DEFAULT_HOST): cv.string,
      vol.Optional(CONF_USERNAME, default=DEFAULT_USER): cv.string,
      vol.Required(CONF_PASSWORD): cv.string,
      vol.Optional(CONF_PORT, default=DEFAULT_PORT): cv.port
  })
  
  
  def get_scanner(hass, config):
      """Validate the configuration and returns a Netgear scanner."""
      info = config[DOMAIN]
      host = info.get(CONF_HOST)
      username = info.get(CONF_USERNAME)
      password = info.get(CONF_PASSWORD)
      port = info.get(CONF_PORT)
  
      scanner = NetgearDeviceScanner(host, username, password, port)
  
      return scanner if scanner.success_init else None
  
  
  class NetgearDeviceScanner(DeviceScanner):
      """Queries a Netgear wireless router using the SOAP-API."""
  
      def __init__(self, host, username, password, port):
          """Initialize the scanner."""
          import pynetgear
  
          self.last_results = []
          self._api = pynetgear.Netgear(password, host, username, port)
  
          _LOGGER.info("Logging in")
  
          results = self._api.get_attached_devices()
  
          self.success_init = results is not None
  
          if self.success_init:
              self.last_results = results
          else:
              _LOGGER.error("Failed to Login")
  
      def scan_devices(self):
          """Scan for new devices and return a list with found device IDs."""
          self._update_info()
  
          return (device.mac for device in self.last_results)
  
      def get_device_name(self, mac):
          """Return the name of the given device or None if we don't know."""
          try:
              return next(device.name for device in self.last_results
                          if device.mac == mac)
          except StopIteration:
              return None
  
      def _update_info(self):
          """Retrieve latest information from the Netgear router.
  
          Returns boolean if scanning successful.
          """
          if not self.success_init:
              return
  
          _LOGGER.info("Scanning")
  
          results = self._api.get_attached_devices()
  
          if results is None:
              _LOGGER.warning("Error scanning devices")
  
          self.last_results = results or []
  