text: """
  Support for Homematic devices.
  
  For more details about this component, please refer to the documentation at
  https://home-assistant.io/components/homematic/
  """
  import os
  import time
  import logging
  from datetime import timedelta
  from functools import partial
  
  import voluptuous as vol
  
  import homeassistant.helpers.config_validation as cv
  from homeassistant.const import (
      EVENT_HOMEASSISTANT_STOP, STATE_UNKNOWN, CONF_USERNAME, CONF_PASSWORD,
      CONF_PLATFORM, CONF_HOSTS, CONF_NAME, ATTR_ENTITY_ID)
  from homeassistant.helpers import discovery
  from homeassistant.helpers.entity import Entity
  from homeassistant.helpers.event import track_time_interval
  from homeassistant.config import load_yaml_config_file
  
  DOMAIN = 'homematic'
  REQUIREMENTS = ["pyhomematic==0.1.21"]
  
  SCAN_INTERVAL_HUB = timedelta(seconds=300)
  SCAN_INTERVAL_VARIABLES = timedelta(seconds=30)
  
  DISCOVER_SWITCHES = 'homematic.switch'
  DISCOVER_LIGHTS = 'homematic.light'
  DISCOVER_SENSORS = 'homematic.sensor'
  DISCOVER_BINARY_SENSORS = 'homematic.binary_sensor'
  DISCOVER_COVER = 'homematic.cover'
  DISCOVER_CLIMATE = 'homematic.climate'
  
  ATTR_DISCOVER_DEVICES = 'devices'
  ATTR_PARAM = 'param'
  ATTR_CHANNEL = 'channel'
  ATTR_NAME = 'name'
  ATTR_ADDRESS = 'address'
  ATTR_VALUE = 'value'
  ATTR_PROXY = 'proxy'
  
  EVENT_KEYPRESS = 'homematic.keypress'
  EVENT_IMPULSE = 'homematic.impulse'
  
  SERVICE_VIRTUALKEY = 'virtualkey'
  SERVICE_RECONNECT = 'reconnect'
  SERVICE_SET_VAR_VALUE = 'set_var_value'
  SERVICE_SET_DEV_VALUE = 'set_dev_value'
  
  HM_DEVICE_TYPES = {
      DISCOVER_SWITCHES: [
          'Switch', 'SwitchPowermeter', 'IOSwitch', 'IPSwitch',
          'IPSwitchPowermeter', 'KeyMatic', 'HMWIOSwitch'],
      DISCOVER_LIGHTS: ['Dimmer', 'KeyDimmer'],
      DISCOVER_SENSORS: [
          'SwitchPowermeter', 'Motion', 'MotionV2', 'RemoteMotion', 'MotionIP',
          'ThermostatWall', 'AreaThermostat', 'RotaryHandleSensor',
          'WaterSensor', 'PowermeterGas', 'LuxSensor', 'WeatherSensor',
          'WeatherStation', 'ThermostatWall2', 'TemperatureDiffSensor',
          'TemperatureSensor', 'CO2Sensor', 'IPSwitchPowermeter', 'HMWIOSwitch'],
      DISCOVER_CLIMATE: [
          'Thermostat', 'ThermostatWall', 'MAXThermostat', 'ThermostatWall2',
          'MAXWallThermostat'],
      DISCOVER_BINARY_SENSORS: [
          'ShutterContact', 'Smoke', 'SmokeV2', 'Motion', 'MotionV2',
          'RemoteMotion', 'WeatherSensor', 'TiltSensor', 'IPShutterContact',
          'HMWIOSwitch', 'MaxShutterContact'],
      DISCOVER_COVER: ['Blind', 'KeyBlind']
  }
  
  HM_IGNORE_DISCOVERY_NODE = [
      'ACTUAL_TEMPERATURE',
      'ACTUAL_HUMIDITY'
  ]
  
  HM_ATTRIBUTE_SUPPORT = {
      'LOWBAT': ['Battery', {0: 'High', 1: 'Low'}],
      'ERROR': ['Sabotage', {0: 'No', 1: 'Yes'}],
      'RSSI_DEVICE': ['RSSI', {}],
      'VALVE_STATE': ['Valve', {}],
      'BATTERY_STATE': ['Battery', {}],
      'CONTROL_MODE': ['Mode', {0: 'Auto', 1: 'Manual', 2: 'Away', 3: 'Boost'}],
      'POWER': ['Power', {}],
      'CURRENT': ['Current', {}],
      'VOLTAGE': ['Voltage', {}],
      'WORKING': ['Working', {0: 'No', 1: 'Yes'}],
  }
  
  HM_PRESS_EVENTS = [
      'PRESS_SHORT',
      'PRESS_LONG',
      'PRESS_CONT',
      'PRESS_LONG_RELEASE',
      'PRESS',
  ]
  
  HM_IMPULSE_EVENTS = [
      'SEQUENCE_OK',
  ]
  
  _LOGGER = logging.getLogger(__name__)
  
  CONF_RESOLVENAMES_OPTIONS = [
      'metadata',
      'json',
      'xml',
      False
  ]
  
  DATA_HOMEMATIC = 'homematic'
  DATA_DELAY = 'homematic_delay'
  DATA_DEVINIT = 'homematic_devinit'
  DATA_STORE = 'homematic_store'
  
  CONF_LOCAL_IP = 'local_ip'
  CONF_LOCAL_PORT = 'local_port'
  CONF_IP = 'ip'
  CONF_PORT = 'port'
  CONF_RESOLVENAMES = 'resolvenames'
  CONF_VARIABLES = 'variables'
  CONF_DEVICES = 'devices'
  CONF_DELAY = 'delay'
  CONF_PRIMARY = 'primary'
  
  DEFAULT_LOCAL_IP = "0.0.0.0"
  DEFAULT_LOCAL_PORT = 0
  DEFAULT_RESOLVENAMES = False
  DEFAULT_PORT = 2001
  DEFAULT_USERNAME = "Admin"
  DEFAULT_PASSWORD = ""
  DEFAULT_VARIABLES = False
  DEFAULT_DEVICES = True
  DEFAULT_DELAY = 0.5
  DEFAULT_PRIMARY = False
  
  
  DEVICE_SCHEMA = vol.Schema({
      vol.Required(CONF_PLATFORM): "homematic",
      vol.Required(ATTR_NAME): cv.string,
      vol.Required(ATTR_ADDRESS): cv.string,
      vol.Required(ATTR_PROXY): cv.string,
      vol.Optional(ATTR_CHANNEL, default=1): vol.Coerce(int),
      vol.Optional(ATTR_PARAM): cv.string,
  })
  
  CONFIG_SCHEMA = vol.Schema({
      DOMAIN: vol.Schema({
          vol.Required(CONF_HOSTS): {cv.match_all: {
              vol.Required(CONF_IP): cv.string,
              vol.Optional(CONF_PORT, default=DEFAULT_PORT):
                  cv.port,
              vol.Optional(CONF_USERNAME, default=DEFAULT_USERNAME): cv.string,
              vol.Optional(CONF_PASSWORD, default=DEFAULT_PASSWORD): cv.string,
              vol.Optional(CONF_VARIABLES, default=DEFAULT_VARIABLES):
                  cv.boolean,
              vol.Optional(CONF_RESOLVENAMES, default=DEFAULT_RESOLVENAMES):
                  vol.In(CONF_RESOLVENAMES_OPTIONS),
              vol.Optional(CONF_DEVICES, default=DEFAULT_DEVICES): cv.boolean,
              vol.Optional(CONF_PRIMARY, default=DEFAULT_PRIMARY): cv.boolean,
          }},
          vol.Optional(CONF_LOCAL_IP, default=DEFAULT_LOCAL_IP): cv.string,
          vol.Optional(CONF_LOCAL_PORT, default=DEFAULT_LOCAL_PORT): cv.port,
          vol.Optional(CONF_DELAY, default=DEFAULT_DELAY): vol.Coerce(float),
      }),
  }, extra=vol.ALLOW_EXTRA)
  
  SCHEMA_SERVICE_VIRTUALKEY = vol.Schema({
      vol.Required(ATTR_ADDRESS): cv.string,
      vol.Required(ATTR_CHANNEL): vol.Coerce(int),
      vol.Required(ATTR_PARAM): cv.string,
      vol.Optional(ATTR_PROXY): cv.string,
  })
  
  SCHEMA_SERVICE_SET_VAR_VALUE = vol.Schema({
      vol.Required(ATTR_NAME): cv.string,
      vol.Required(ATTR_VALUE): cv.match_all,
      vol.Optional(ATTR_ENTITY_ID): cv.entity_ids,
  })
  
  SCHEMA_SERVICE_SET_DEV_VALUE = vol.Schema({
      vol.Required(ATTR_ADDRESS): cv.string,
      vol.Required(ATTR_CHANNEL): vol.Coerce(int),
      vol.Required(ATTR_PARAM): cv.string,
      vol.Required(ATTR_VALUE): cv.match_all,
      vol.Optional(ATTR_PROXY): cv.string,
  })
  
  SCHEMA_SERVICE_RECONNECT = vol.Schema({})
  
  
  def virtualkey(hass, address, channel, param, proxy=None):
      """Send virtual keypress to homematic controlller."""
      data = {
          ATTR_ADDRESS: address,
          ATTR_CHANNEL: channel,
          ATTR_PARAM: param,
          ATTR_PROXY: proxy,
      }
  
      hass.services.call(DOMAIN, SERVICE_VIRTUALKEY, data)
  
  
  def set_var_value(hass, entity_id, value):
      """Change value of homematic system variable."""
      data = {
          ATTR_ENTITY_ID: entity_id,
          ATTR_VALUE: value,
      }
  
      hass.services.call(DOMAIN, SERVICE_SET_VAR_VALUE, data)
  
  
  def set_dev_value(hass, address, channel, param, value, proxy=None):
      """Send virtual keypress to homematic controlller."""
      data = {
          ATTR_ADDRESS: address,
          ATTR_CHANNEL: channel,
          ATTR_PARAM: param,
          ATTR_VALUE: value,
          ATTR_PROXY: proxy,
      }
  
      hass.services.call(DOMAIN, SERVICE_SET_DEV_VALUE, data)
  
  
  def reconnect(hass):
      """Reconnect to CCU/Homegear."""
      hass.services.call(DOMAIN, SERVICE_RECONNECT, {})
  
  
  # pylint: disable=unused-argument
  def setup(hass, config):
      """Setup the Homematic component."""
      from pyhomematic import HMConnection
  
      hass.data[DATA_DELAY] = config[DOMAIN].get(CONF_DELAY)
      hass.data[DATA_DEVINIT] = {}
      hass.data[DATA_STORE] = []
  
      # create hosts list for pyhomematic
      remotes = {}
      hosts = {}
      for rname, rconfig in config[DOMAIN][CONF_HOSTS].items():
          server = rconfig.get(CONF_IP)
  
          remotes[rname] = {}
          remotes[rname][CONF_IP] = server
          remotes[rname][CONF_PORT] = rconfig.get(CONF_PORT)
          remotes[rname][CONF_RESOLVENAMES] = rconfig.get(CONF_RESOLVENAMES)
          remotes[rname][CONF_USERNAME] = rconfig.get(CONF_USERNAME)
          remotes[rname][CONF_PASSWORD] = rconfig.get(CONF_PASSWORD)
  
          if server not in hosts or rconfig.get(CONF_PRIMARY):
              hosts[server] = {
                  CONF_VARIABLES: rconfig.get(CONF_VARIABLES),
                  CONF_NAME: rname,
              }
          hass.data[DATA_DEVINIT][rname] = rconfig.get(CONF_DEVICES)
  
      # Create server thread
      bound_system_callback = partial(_system_callback_handler, hass, config)
      hass.data[DATA_HOMEMATIC] = HMConnection(
          local=config[DOMAIN].get(CONF_LOCAL_IP),
          localport=config[DOMAIN].get(CONF_LOCAL_PORT),
          remotes=remotes,
          systemcallback=bound_system_callback,
          interface_id="homeassistant"
      )
  
      # Start server thread, connect to peer, initialize to receive events
      hass.data[DATA_HOMEMATIC].start()
  
      # Stops server when Homeassistant is shutting down
      hass.bus.listen_once(
          EVENT_HOMEASSISTANT_STOP, hass.data[DATA_HOMEMATIC].stop)
      hass.config.components.append(DOMAIN)
  
      # init homematic hubs
      entity_hubs = []
      for _, hub_data in hosts.items():
          entity_hubs.append(HMHub(
              hass, hub_data[CONF_NAME], hub_data[CONF_VARIABLES]))
  
      # regeister homematic services
      descriptions = load_yaml_config_file(
          os.path.join(os.path.dirname(__file__), 'services.yaml'))
  
      def _hm_service_virtualkey(service):
          """Service handle virtualkey services."""
          address = service.data.get(ATTR_ADDRESS)
          channel = service.data.get(ATTR_CHANNEL)
          param = service.data.get(ATTR_PARAM)
  
          # device not found
          hmdevice = _device_from_servicecall(hass, service)
          if hmdevice is None:
              _LOGGER.error("%s not found for service virtualkey!", address)
              return
  
          # if param exists for this device
          if param not in hmdevice.ACTIONNODE:
              _LOGGER.error("%s not datapoint in hm device %s", param, address)
              return
  
          # channel exists?
          if channel not in hmdevice.ACTIONNODE[param]:
              _LOGGER.error("%i is not a channel in hm device %s",
                            channel, address)
              return
  
          # call key
          hmdevice.actionNodeData(param, True, channel)
  
      hass.services.register(
          DOMAIN, SERVICE_VIRTUALKEY, _hm_service_virtualkey,
          descriptions[DOMAIN][SERVICE_VIRTUALKEY],
          schema=SCHEMA_SERVICE_VIRTUALKEY)
  
      def _service_handle_value(service):
          """Set value on homematic variable."""
          entity_ids = service.data.get(ATTR_ENTITY_ID)
          name = service.data[ATTR_NAME]
          value = service.data[ATTR_VALUE]
  
          if entity_ids:
              entities = [entity for entity in entity_hubs if
                          entity.entity_id in entity_ids]
          else:
              entities = entity_hubs
  
          if not entities:
              _LOGGER.error("Homematic controller not found!")
              return
  
          for hub in entities:
              hub.hm_set_variable(name, value)
  
      hass.services.register(
          DOMAIN, SERVICE_SET_VAR_VALUE, _service_handle_value,
          descriptions[DOMAIN][SERVICE_SET_VAR_VALUE],
          schema=SCHEMA_SERVICE_SET_VAR_VALUE)
  
      def _service_handle_reconnect(service):
          """Reconnect to all homematic hubs."""
          hass.data[DATA_HOMEMATIC].reconnect()
  
      hass.services.register(
          DOMAIN, SERVICE_RECONNECT, _service_handle_reconnect,
          descriptions[DOMAIN][SERVICE_RECONNECT],
          schema=SCHEMA_SERVICE_RECONNECT)
  
      def _service_handle_device(service):
          """Service handle set_dev_value services."""
          address = service.data.get(ATTR_ADDRESS)
          channel = service.data.get(ATTR_CHANNEL)
          param = service.data.get(ATTR_PARAM)
          value = service.data.get(ATTR_VALUE)
  
          # device not found
          hmdevice = _device_from_servicecall(hass, service)
          if hmdevice is None:
              _LOGGER.error("%s not found!", address)
              return
  
          # call key
          hmdevice.setValue(param, value, channel)
  
      hass.services.register(
          DOMAIN, SERVICE_SET_DEV_VALUE, _service_handle_device,
          descriptions[DOMAIN][SERVICE_SET_DEV_VALUE],
          schema=SCHEMA_SERVICE_SET_DEV_VALUE)
  
      return True
  
  
  def _system_callback_handler(hass, config, src, *args):
      """Callback handler."""
      if src == 'newDevices':
          _LOGGER.debug("newDevices with: %s", args)
          # pylint: disable=unused-variable
          (interface_id, dev_descriptions) = args
          proxy = interface_id.split('-')[-1]
  
          # device support active?
          if not hass.data[DATA_DEVINIT][proxy]:
              return
  
          ##
          # Get list of all keys of the devices (ignoring channels)
          key_dict = {}
          for dev in dev_descriptions:
              key_dict[dev['ADDRESS'].split(':')[0]] = True
  
          ##
          # remove device they allready init by HA
          tmp_devs = key_dict.copy()
          for dev in tmp_devs:
              if dev in hass.data[DATA_STORE]:
                  del key_dict[dev]
              else:
                  hass.data[DATA_STORE].append(dev)
  
          # Register EVENTS
          # Search all device with a EVENTNODE that include data
          bound_event_callback = partial(_hm_event_handler, hass, proxy)
          for dev in key_dict:
              hmdevice = hass.data[DATA_HOMEMATIC].devices[proxy].get(dev)
  
              # have events?
              if len(hmdevice.EVENTNODE) > 0:
                  _LOGGER.debug("Register Events from %s", dev)
                  hmdevice.setEventCallback(callback=bound_event_callback,
                                            bequeath=True)
  
          # If configuration allows autodetection of devices,
          # all devices not configured are added.
          if key_dict:
              for component_name, discovery_type in (
                      ('switch', DISCOVER_SWITCHES),
                      ('light', DISCOVER_LIGHTS),
                      ('cover', DISCOVER_COVER),
                      ('binary_sensor', DISCOVER_BINARY_SENSORS),
                      ('sensor', DISCOVER_SENSORS),
                      ('climate', DISCOVER_CLIMATE)):
                  # Get all devices of a specific type
                  found_devices = _get_devices(
                      hass, discovery_type, key_dict, proxy)
  
                  # When devices of this type are found
                  # they are setup in HA and an event is fired
                  if found_devices:
                      # Fire discovery event
                      discovery.load_platform(hass, component_name, DOMAIN, {
                          ATTR_DISCOVER_DEVICES: found_devices
                      }, config)
  
  
  def _get_devices(hass, discovery_type, keys, proxy):
      """Get the Homematic devices for given discovery_type."""
      device_arr = []
  
      for key in keys:
          device = hass.data[DATA_HOMEMATIC].devices[proxy][key]
          class_name = device.__class__.__name__
          metadata = {}
  
          # Class supported by discovery type
          if class_name not in HM_DEVICE_TYPES[discovery_type]:
              continue
  
          # Load metadata if needed to generate a param list
          if discovery_type == DISCOVER_SENSORS:
              metadata.update(device.SENSORNODE)
          elif discovery_type == DISCOVER_BINARY_SENSORS:
              metadata.update(device.BINARYNODE)
          else:
              metadata.update({None: device.ELEMENT})
  
          if metadata:
              # Generate options for 1...n elements with 1...n params
              for param, channels in metadata.items():
                  if param in HM_IGNORE_DISCOVERY_NODE:
                      continue
  
                  # Add devices
                  _LOGGER.debug("%s: Handling %s: %s: %s",
                                discovery_type, key, param, channels)
                  for channel in channels:
                      name = _create_ha_name(
                          name=device.NAME, channel=channel, param=param,
                          count=len(channels)
                      )
                      device_dict = {
                          CONF_PLATFORM: "homematic",
                          ATTR_ADDRESS: key,
                          ATTR_PROXY: proxy,
                          ATTR_NAME: name,
                          ATTR_CHANNEL: channel
                      }
                      if param is not None:
                          device_dict[ATTR_PARAM] = param
  
                      # Add new device
                      try:
                          DEVICE_SCHEMA(device_dict)
                          device_arr.append(device_dict)
                      except vol.MultipleInvalid as err:
                          _LOGGER.error("Invalid device config: %s",
                                        str(err))
          else:
              _LOGGER.debug("Got no params for %s", key)
      _LOGGER.debug("%s autodiscovery done: %s", discovery_type, str(device_arr))
      return device_arr
  
  
  def _create_ha_name(name, channel, param, count):
      """Generate a unique object name."""
      # HMDevice is a simple device
      if count == 1 and param is None:
          return name
  
      # Has multiple elements/channels
      if count > 1 and param is None:
          return "{} {}".format(name, channel)
  
      # With multiple param first elements
      if count == 1 and param is not None:
          return "{} {}".format(name, param)
  
      # Multiple param on object with multiple elements
      if count > 1 and param is not None:
          return "{} {} {}".format(name, channel, param)
  
  
  def setup_hmdevice_discovery_helper(hass, hmdevicetype, discovery_info,
                                      add_callback_devices):
      """Helper to setup Homematic devices with discovery info."""
      devices = []
      for config in discovery_info[ATTR_DISCOVER_DEVICES]:
          _LOGGER.debug("Add device %s from config: %s",
                        str(hmdevicetype), str(config))
  
          # create object and add to HA
          new_device = hmdevicetype(hass, config)
          new_device.link_homematic()
          devices.append(new_device)
  
      add_callback_devices(devices)
      return True
  
  
  def _hm_event_handler(hass, proxy, device, caller, attribute, value):
      """Handle all pyhomematic device events."""
      try:
          channel = int(device.split(":")[1])
          address = device.split(":")[0]
          hmdevice = hass.data[DATA_HOMEMATIC].devices[proxy].get(address)
      except (TypeError, ValueError):
          _LOGGER.error("Event handling channel convert error!")
          return
  
      # is not a event?
      if attribute not in hmdevice.EVENTNODE:
          return
  
      _LOGGER.debug("Event %s for %s channel %i", attribute,
                    hmdevice.NAME, channel)
  
      # keypress event
      if attribute in HM_PRESS_EVENTS:
          hass.add_job(hass.bus.async_fire(EVENT_KEYPRESS, {
              ATTR_NAME: hmdevice.NAME,
              ATTR_PARAM: attribute,
              ATTR_CHANNEL: channel
          }))
          return
  
      # impulse event
      if attribute in HM_IMPULSE_EVENTS:
          hass.add_job(hass.bus.async_fire(EVENT_KEYPRESS, {
              ATTR_NAME: hmdevice.NAME,
              ATTR_CHANNEL: channel
          }))
          return
  
      _LOGGER.warning("Event is unknown and not forwarded to HA")
  
  
  def _device_from_servicecall(hass, service):
      """Extract homematic device from service call."""
      address = service.data.get(ATTR_ADDRESS)
      proxy = service.data.get(ATTR_PROXY)
  
      if proxy:
          return hass.data[DATA_HOMEMATIC].devices[proxy].get(address)
  
      for _, devices in hass.data[DATA_HOMEMATIC].devices.items():
          if address in devices:
              return devices[address]
  
  
  class HMHub(Entity):
      """The Homematic hub. I.e. CCU2/HomeGear."""
  
      def __init__(self, hass, name, use_variables):
          """Initialize Homematic hub."""
          self.hass = hass
          self.entity_id = "{}.{}".format(DOMAIN, name.lower())
          self._homematic = hass.data[DATA_HOMEMATIC]
          self._variables = {}
          self._name = name
          self._state = STATE_UNKNOWN
          self._use_variables = use_variables
  
          # load data
          track_time_interval(hass, self._update_hub, SCAN_INTERVAL_HUB)
          self._update_hub(None)
  
          if self._use_variables:
              track_time_interval(
                  hass, self._update_variables, SCAN_INTERVAL_VARIABLES)
              self._update_variables(None)
  
      @property
      def name(self):
          """Return the name of the device."""
          return self._name
  
      @property
      def should_poll(self):
          """Return false. Homematic Hub object update variable."""
          return False
  
      @property
      def state(self):
          """Return the state of the entity."""
          return self._state
  
      @property
      def state_attributes(self):
          """Return the state attributes."""
          attr = self._variables.copy()
          return attr
  
      @property
      def icon(self):
          """Return the icon to use in the frontend, if any."""
          return "mdi:gradient"
  
      def _update_hub(self, now):
          """Retrieve latest state."""
          state = self._homematic.getServiceMessages(self._name)
          self._state = STATE_UNKNOWN if state is None else len(state)
          self.schedule_update_ha_state()
  
      def _update_variables(self, now):
          """Retrive all variable data and update hmvariable states."""
          variables = self._homematic.getAllSystemVariables(self._name)
          if variables is None:
              return
  
          state_change = False
          for key, value in variables.items():
              if key in self._variables and value == self._variables[key]:
                  continue
  
              state_change = True
              self._variables.update({key: value})
  
          if state_change:
              self.schedule_update_ha_state()
  
      def hm_set_variable(self, name, value):
          """Set variable on homematic controller."""
          if name not in self._variables:
              _LOGGER.error("Variable %s not found on %s", name, self.name)
              return
          old_value = self._variables.get(name)
          if isinstance(old_value, bool):
              value = cv.boolean(value)
          else:
              value = float(value)
          self._homematic.setSystemVariable(self.name, name, value)
  
          self._variables.update({name: value})
          self.schedule_update_ha_state()
  
  
  class HMDevice(Entity):
      """The Homematic device base object."""
  
      def __init__(self, hass, config):
          """Initialize a generic Homematic device."""
          self.hass = hass
          self._homematic = hass.data[DATA_HOMEMATIC]
          self._name = config.get(ATTR_NAME)
          self._address = config.get(ATTR_ADDRESS)
          self._proxy = config.get(ATTR_PROXY)
          self._channel = config.get(ATTR_CHANNEL)
          self._state = config.get(ATTR_PARAM)
          self._data = {}
          self._hmdevice = None
          self._connected = False
          self._available = False
  
          # Set param to uppercase
          if self._state:
              self._state = self._state.upper()
  
      @property
      def should_poll(self):
          """Return false. Homematic states are pushed by the XML RPC Server."""
          return False
  
      @property
      def name(self):
          """Return the name of the device."""
          return self._name
  
      @property
      def assumed_state(self):
          """Return true if unable to access real state of the device."""
          return not self._available
  
      @property
      def available(self):
          """Return true if device is available."""
          return self._available
  
      @property
      def device_state_attributes(self):
          """Return device specific state attributes."""
          attr = {}
  
          # no data available to create
          if not self.available:
              return attr
  
          # Generate an attributes list
          for node, data in HM_ATTRIBUTE_SUPPORT.items():
              # Is an attributes and exists for this object
              if node in self._data:
                  value = data[1].get(self._data[node], self._data[node])
                  attr[data[0]] = value
  
          # static attributes
          attr['ID'] = self._hmdevice.ADDRESS
          attr['proxy'] = self._proxy
  
          return attr
  
      def link_homematic(self):
          """Connect to Homematic."""
          # device is already linked
          if self._connected:
              return True
  
          # Init
          self._hmdevice = self._homematic.devices[self._proxy][self._address]
          self._connected = True
  
          # Check if Homematic class is okay for HA class
          _LOGGER.info("Start linking %s to %s", self._address, self._name)
          try:
              # Init datapoints of this object
              self._init_data()
              if self.hass.data[DATA_DELAY]:
                  # We delay / pause loading of data to avoid overloading
                  # of CCU / Homegear when doing auto detection
                  time.sleep(self.hass.data[DATA_DELAY])
              self._load_data_from_hm()
              _LOGGER.debug("%s datastruct: %s", self._name, str(self._data))
  
              # Link events from pyhomatic
              self._subscribe_homematic_events()
              self._available = not self._hmdevice.UNREACH
              _LOGGER.debug("%s linking done", self._name)
          # pylint: disable=broad-except
          except Exception as err:
              self._connected = False
              _LOGGER.error("Exception while linking %s: %s",
                            self._address, str(err))
  
      def _hm_event_callback(self, device, caller, attribute, value):
          """Handle all pyhomematic device events."""
          _LOGGER.debug("%s received event '%s' value: %s", self._name,
                        attribute, value)
          have_change = False
  
          # Is data needed for this instance?
          if attribute in self._data:
              # Did data change?
              if self._data[attribute] != value:
                  self._data[attribute] = value
                  have_change = True
  
          # If available it has changed
          if attribute == 'UNREACH':
              self._available = bool(value)
              have_change = True
  
          # If it has changed data point, update HA
          if have_change:
              _LOGGER.debug("%s update_ha_state after '%s'", self._name,
                            attribute)
              self.schedule_update_ha_state()
  
      def _subscribe_homematic_events(self):
          """Subscribe all required events to handle job."""
          channels_to_sub = {0: True}  # add channel 0 for UNREACH
  
          # Push data to channels_to_sub from hmdevice metadata
          for metadata in (self._hmdevice.SENSORNODE, self._hmdevice.BINARYNODE,
                           self._hmdevice.ATTRIBUTENODE,
                           self._hmdevice.WRITENODE, self._hmdevice.EVENTNODE,
                           self._hmdevice.ACTIONNODE):
              for node, channels in metadata.items():
                  # Data is needed for this instance
                  if node in self._data:
                      # chan is current channel
                      if len(channels) == 1:
                          channel = channels[0]
                      else:
                          channel = self._channel
  
                      # Prepare for subscription
                      try:
                          if int(channel) >= 0:
                              channels_to_sub.update({int(channel): True})
                      except (ValueError, TypeError):
                          _LOGGER.error("Invalid channel in metadata from %s",
                                        self._name)
  
          # Set callbacks
          for channel in channels_to_sub:
              _LOGGER.debug(
                  "Subscribe channel %d from %s", channel, self._name)
              self._hmdevice.setEventCallback(
                  callback=self._hm_event_callback, bequeath=False,
                  channel=channel)
  
      def _load_data_from_hm(self):
          """Load first value from pyhomematic."""
          if not self._connected:
              return False
  
          # Read data from pyhomematic
          for metadata, funct in (
                  (self._hmdevice.ATTRIBUTENODE,
                   self._hmdevice.getAttributeData),
                  (self._hmdevice.WRITENODE, self._hmdevice.getWriteData),
                  (self._hmdevice.SENSORNODE, self._hmdevice.getSensorData),
                  (self._hmdevice.BINARYNODE, self._hmdevice.getBinaryData)):
              for node in metadata:
                  if metadata[node] and node in self._data:
                      self._data[node] = funct(name=node, channel=self._channel)
  
          return True
  
      def _hm_set_state(self, value):
          """Set data to main datapoint."""
          if self._state in self._data:
              self._data[self._state] = value
  
      def _hm_get_state(self):
          """Get data from main datapoint."""
          if self._state in self._data:
              return self._data[self._state]
          return None
  
      def _init_data(self):
          """Generate a data dict (self._data) from the Homematic metadata."""
          # Add all attributes to data dict
          for data_note in self._hmdevice.ATTRIBUTENODE:
              self._data.update({data_note: STATE_UNKNOWN})
  
          # init device specified data
          self._init_data_struct()
  
      def _init_data_struct(self):
          """Generate a data dict from the Homematic device metadata."""
          raise NotImplementedError
  