129 lines
4.2 KiB
Python
129 lines
4.2 KiB
Python
"""Support for WeMo binary sensors."""
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import asyncio
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import logging
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import async_timeout
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import requests
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from homeassistant.components.binary_sensor import BinarySensorDevice
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from homeassistant.exceptions import PlatformNotReady
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DEPENDENCIES = ['wemo']
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_LOGGER = logging.getLogger(__name__)
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def setup_platform(hass, config, add_entities, discovery_info=None):
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"""Register discovered WeMo binary sensors."""
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from pywemo import discovery
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if discovery_info is not None:
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location = discovery_info['ssdp_description']
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mac = discovery_info['mac_address']
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try:
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device = discovery.device_from_description(location, mac)
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except (requests.exceptions.ConnectionError,
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requests.exceptions.Timeout) as err:
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_LOGGER.error('Unable to access %s (%s)', location, err)
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raise PlatformNotReady
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if device:
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add_entities([WemoBinarySensor(hass, device)])
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class WemoBinarySensor(BinarySensorDevice):
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"""Representation a WeMo binary sensor."""
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def __init__(self, hass, device):
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"""Initialize the WeMo sensor."""
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self.wemo = device
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self._state = None
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self._available = True
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self._update_lock = None
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self._model_name = self.wemo.model_name
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self._name = self.wemo.name
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self._serialnumber = self.wemo.serialnumber
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def _subscription_callback(self, _device, _type, _params):
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"""Update the state by the Wemo sensor."""
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_LOGGER.debug("Subscription update for %s", self.name)
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updated = self.wemo.subscription_update(_type, _params)
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self.hass.add_job(
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self._async_locked_subscription_callback(not updated))
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async def _async_locked_subscription_callback(self, force_update):
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"""Handle an update from a subscription."""
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# If an update is in progress, we don't do anything
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if self._update_lock.locked():
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return
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await self._async_locked_update(force_update)
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self.async_schedule_update_ha_state()
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async def async_added_to_hass(self):
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"""Wemo sensor added to HASS."""
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# Define inside async context so we know our event loop
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self._update_lock = asyncio.Lock()
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registry = self.hass.components.wemo.SUBSCRIPTION_REGISTRY
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await self.hass.async_add_executor_job(registry.register, self.wemo)
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registry.on(self.wemo, None, self._subscription_callback)
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async def async_update(self):
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"""Update WeMo state.
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Wemo has an aggressive retry logic that sometimes can take over a
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minute to return. If we don't get a state after 5 seconds, assume the
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Wemo sensor is unreachable. If update goes through, it will be made
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available again.
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"""
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# If an update is in progress, we don't do anything
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if self._update_lock.locked():
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return
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try:
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with async_timeout.timeout(5):
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await asyncio.shield(self._async_locked_update(True))
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except asyncio.TimeoutError:
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_LOGGER.warning('Lost connection to %s', self.name)
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self._available = False
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async def _async_locked_update(self, force_update):
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"""Try updating within an async lock."""
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async with self._update_lock:
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await self.hass.async_add_executor_job(self._update, force_update)
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def _update(self, force_update=True):
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"""Update the sensor state."""
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try:
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self._state = self.wemo.get_state(force_update)
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if not self._available:
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_LOGGER.info('Reconnected to %s', self.name)
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self._available = True
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except AttributeError as err:
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_LOGGER.warning("Could not update status for %s (%s)",
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self.name, err)
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self._available = False
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@property
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def unique_id(self):
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"""Return the id of this WeMo sensor."""
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return self._serialnumber
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@property
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def name(self):
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"""Return the name of the service if any."""
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return self._name
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@property
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def is_on(self):
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"""Return true if sensor is on."""
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return self._state
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@property
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def available(self):
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"""Return true if sensor is available."""
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return self._available
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