206 lines
8.0 KiB
Python
206 lines
8.0 KiB
Python
"""
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Support for MQTT binary sensors.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/binary_sensor.mqtt/
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"""
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import logging
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import voluptuous as vol
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from homeassistant.components import binary_sensor, mqtt
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from homeassistant.components.binary_sensor import (
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DEVICE_CLASSES_SCHEMA, BinarySensorDevice)
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from homeassistant.components.mqtt import (
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ATTR_DISCOVERY_HASH, CONF_QOS, CONF_STATE_TOPIC, CONF_UNIQUE_ID,
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MqttAttributes, MqttAvailability, MqttDiscoveryUpdate,
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MqttEntityDeviceInfo, subscription)
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from homeassistant.components.mqtt.discovery import (
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MQTT_DISCOVERY_NEW, clear_discovery_hash)
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from homeassistant.const import (
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CONF_DEVICE, CONF_DEVICE_CLASS, CONF_FORCE_UPDATE, CONF_NAME,
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CONF_PAYLOAD_OFF, CONF_PAYLOAD_ON, CONF_VALUE_TEMPLATE)
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from homeassistant.core import callback
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import homeassistant.helpers.config_validation as cv
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from homeassistant.helpers.dispatcher import async_dispatcher_connect
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import homeassistant.helpers.event as evt
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from homeassistant.helpers.typing import ConfigType, HomeAssistantType
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_LOGGER = logging.getLogger(__name__)
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DEFAULT_NAME = 'MQTT Binary sensor'
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CONF_OFF_DELAY = 'off_delay'
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DEFAULT_PAYLOAD_OFF = 'OFF'
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DEFAULT_PAYLOAD_ON = 'ON'
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DEFAULT_FORCE_UPDATE = False
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DEPENDENCIES = ['mqtt']
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PLATFORM_SCHEMA = mqtt.MQTT_RO_PLATFORM_SCHEMA.extend({
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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vol.Optional(CONF_PAYLOAD_OFF, default=DEFAULT_PAYLOAD_OFF): cv.string,
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vol.Optional(CONF_PAYLOAD_ON, default=DEFAULT_PAYLOAD_ON): cv.string,
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vol.Optional(CONF_DEVICE_CLASS): DEVICE_CLASSES_SCHEMA,
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vol.Optional(CONF_FORCE_UPDATE, default=DEFAULT_FORCE_UPDATE): cv.boolean,
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vol.Optional(CONF_OFF_DELAY):
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vol.All(vol.Coerce(int), vol.Range(min=0)),
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# Integrations should never expose unique_id through configuration.
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# This is an exception because MQTT is a message transport, not a protocol
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vol.Optional(CONF_UNIQUE_ID): cv.string,
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vol.Optional(CONF_DEVICE): mqtt.MQTT_ENTITY_DEVICE_INFO_SCHEMA,
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}).extend(mqtt.MQTT_AVAILABILITY_SCHEMA.schema).extend(
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mqtt.MQTT_JSON_ATTRS_SCHEMA.schema)
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async def async_setup_platform(hass: HomeAssistantType, config: ConfigType,
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async_add_entities, discovery_info=None):
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"""Set up MQTT binary sensor through configuration.yaml."""
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await _async_setup_entity(config, async_add_entities)
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async def async_setup_entry(hass, config_entry, async_add_entities):
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"""Set up MQTT binary sensor dynamically through MQTT discovery."""
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async def async_discover(discovery_payload):
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"""Discover and add a MQTT binary sensor."""
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try:
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discovery_hash = discovery_payload.pop(ATTR_DISCOVERY_HASH)
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config = PLATFORM_SCHEMA(discovery_payload)
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await _async_setup_entity(config, async_add_entities, config_entry,
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discovery_hash)
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except Exception:
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if discovery_hash:
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clear_discovery_hash(hass, discovery_hash)
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raise
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async_dispatcher_connect(
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hass, MQTT_DISCOVERY_NEW.format(binary_sensor.DOMAIN, 'mqtt'),
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async_discover)
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async def _async_setup_entity(config, async_add_entities, config_entry=None,
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discovery_hash=None):
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"""Set up the MQTT binary sensor."""
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async_add_entities([MqttBinarySensor(config, config_entry,
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discovery_hash)])
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class MqttBinarySensor(MqttAttributes, MqttAvailability, MqttDiscoveryUpdate,
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MqttEntityDeviceInfo, BinarySensorDevice):
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"""Representation a binary sensor that is updated by MQTT."""
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def __init__(self, config, config_entry, discovery_hash):
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"""Initialize the MQTT binary sensor."""
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self._config = config
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self._unique_id = config.get(CONF_UNIQUE_ID)
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self._state = None
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self._sub_state = None
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self._delay_listener = None
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device_config = config.get(CONF_DEVICE)
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MqttAttributes.__init__(self, config)
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MqttAvailability.__init__(self, config)
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MqttDiscoveryUpdate.__init__(self, discovery_hash,
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self.discovery_update)
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MqttEntityDeviceInfo.__init__(self, device_config, config_entry)
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async def async_added_to_hass(self):
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"""Subscribe mqtt events."""
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await super().async_added_to_hass()
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await self._subscribe_topics()
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async def discovery_update(self, discovery_payload):
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"""Handle updated discovery message."""
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config = PLATFORM_SCHEMA(discovery_payload)
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self._config = config
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await self.attributes_discovery_update(config)
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await self.availability_discovery_update(config)
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await self.device_info_discovery_update(config)
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await self._subscribe_topics()
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self.async_schedule_update_ha_state()
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async def _subscribe_topics(self):
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"""(Re)Subscribe to topics."""
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value_template = self._config.get(CONF_VALUE_TEMPLATE)
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if value_template is not None:
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value_template.hass = self.hass
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@callback
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def off_delay_listener(now):
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"""Switch device off after a delay."""
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self._delay_listener = None
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self._state = False
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self.async_schedule_update_ha_state()
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@callback
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def state_message_received(_topic, payload, _qos):
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"""Handle a new received MQTT state message."""
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value_template = self._config.get(CONF_VALUE_TEMPLATE)
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if value_template is not None:
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payload = value_template.async_render_with_possible_json_value(
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payload, variables={'entity_id': self.entity_id})
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if payload == self._config.get(CONF_PAYLOAD_ON):
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self._state = True
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elif payload == self._config.get(CONF_PAYLOAD_OFF):
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self._state = False
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else: # Payload is not for this entity
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_LOGGER.warning('No matching payload found'
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' for entity: %s with state_topic: %s',
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self._config.get(CONF_NAME),
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self._config.get(CONF_STATE_TOPIC))
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return
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if self._delay_listener is not None:
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self._delay_listener()
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self._delay_listener = None
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off_delay = self._config.get(CONF_OFF_DELAY)
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if (self._state and off_delay is not None):
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self._delay_listener = evt.async_call_later(
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self.hass, off_delay, off_delay_listener)
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self.async_schedule_update_ha_state()
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self._sub_state = await subscription.async_subscribe_topics(
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self.hass, self._sub_state,
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{'state_topic': {'topic': self._config.get(CONF_STATE_TOPIC),
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'msg_callback': state_message_received,
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'qos': self._config.get(CONF_QOS)}})
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async def async_will_remove_from_hass(self):
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"""Unsubscribe when removed."""
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self._sub_state = await subscription.async_unsubscribe_topics(
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self.hass, self._sub_state)
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await MqttAttributes.async_will_remove_from_hass(self)
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await MqttAvailability.async_will_remove_from_hass(self)
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@property
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def should_poll(self):
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"""Return the polling state."""
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return False
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@property
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def name(self):
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"""Return the name of the binary sensor."""
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return self._config.get(CONF_NAME)
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@property
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def is_on(self):
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"""Return true if the binary sensor is on."""
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return self._state
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@property
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def device_class(self):
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"""Return the class of this sensor."""
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return self._config.get(CONF_DEVICE_CLASS)
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@property
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def force_update(self):
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"""Force update."""
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return self._config.get(CONF_FORCE_UPDATE)
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@property
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def unique_id(self):
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"""Return a unique ID."""
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return self._unique_id
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