278 lines
9.3 KiB
Python
278 lines
9.3 KiB
Python
"""Support for MQTT binary sensors."""
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from datetime import timedelta
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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,
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BinarySensorDevice,
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)
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from homeassistant.const import (
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CONF_DEVICE,
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CONF_DEVICE_CLASS,
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CONF_FORCE_UPDATE,
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CONF_NAME,
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CONF_PAYLOAD_OFF,
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CONF_PAYLOAD_ON,
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CONF_VALUE_TEMPLATE,
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)
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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.event import async_track_point_in_utc_time
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from homeassistant.helpers.typing import ConfigType, HomeAssistantType
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from homeassistant.util import dt as dt_util
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from . import (
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ATTR_DISCOVERY_HASH,
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CONF_QOS,
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CONF_STATE_TOPIC,
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CONF_UNIQUE_ID,
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MqttAttributes,
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MqttAvailability,
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MqttDiscoveryUpdate,
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MqttEntityDeviceInfo,
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subscription,
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)
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from .discovery import MQTT_DISCOVERY_NEW, clear_discovery_hash
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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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CONF_EXPIRE_AFTER = "expire_after"
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PLATFORM_SCHEMA = (
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mqtt.MQTT_RO_PLATFORM_SCHEMA.extend(
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{
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vol.Optional(CONF_DEVICE): mqtt.MQTT_ENTITY_DEVICE_INFO_SCHEMA,
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vol.Optional(CONF_DEVICE_CLASS): DEVICE_CLASSES_SCHEMA,
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vol.Optional(CONF_EXPIRE_AFTER): cv.positive_int,
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vol.Optional(CONF_FORCE_UPDATE, default=DEFAULT_FORCE_UPDATE): cv.boolean,
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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vol.Optional(CONF_OFF_DELAY): vol.All(vol.Coerce(int), vol.Range(min=0)),
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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_UNIQUE_ID): cv.string,
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}
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)
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.extend(mqtt.MQTT_AVAILABILITY_SCHEMA.schema)
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.extend(mqtt.MQTT_JSON_ATTRS_SCHEMA.schema)
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)
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async def async_setup_platform(
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hass: HomeAssistantType, config: ConfigType, async_add_entities, discovery_info=None
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):
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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(
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config, async_add_entities, config_entry, discovery_hash
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)
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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"), async_discover
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)
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async def _async_setup_entity(
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config, async_add_entities, config_entry=None, discovery_hash=None
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):
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"""Set up the MQTT binary sensor."""
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async_add_entities([MqttBinarySensor(config, config_entry, discovery_hash)])
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class MqttBinarySensor(
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MqttAttributes,
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MqttAvailability,
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MqttDiscoveryUpdate,
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MqttEntityDeviceInfo,
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BinarySensorDevice,
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):
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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._expiration_trigger = None
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self._delay_listener = None
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self._expired = 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, 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_write_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_write_ha_state()
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@callback
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def state_message_received(msg):
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"""Handle a new received MQTT state message."""
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payload = msg.payload
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# auto-expire enabled?
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expire_after = self._config.get(CONF_EXPIRE_AFTER)
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if expire_after is not None and expire_after > 0:
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# When expire_after is set, and we receive a message, assume device is not expired since it has to be to receive the message
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self._expired = False
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# Reset old trigger
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if self._expiration_trigger:
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self._expiration_trigger()
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self._expiration_trigger = None
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# Set new trigger
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expiration_at = dt_util.utcnow() + timedelta(seconds=expire_after)
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self._expiration_trigger = async_track_point_in_utc_time(
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self.hass, self.value_is_expired, expiration_at
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)
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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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)
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if payload == self._config[CONF_PAYLOAD_ON]:
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self._state = True
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elif payload == self._config[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(
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"No matching payload found" " for entity: %s with state_topic: %s",
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self._config[CONF_NAME],
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self._config[CONF_STATE_TOPIC],
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)
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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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)
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self.async_write_ha_state()
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self._sub_state = await subscription.async_subscribe_topics(
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self.hass,
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self._sub_state,
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{
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"state_topic": {
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"topic": self._config[CONF_STATE_TOPIC],
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"msg_callback": state_message_received,
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"qos": self._config[CONF_QOS],
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}
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},
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)
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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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)
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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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@callback
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def value_is_expired(self, *_):
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"""Triggered when value is expired."""
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self._expiration_trigger = None
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self._expired = True
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self.async_write_ha_state()
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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[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[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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@property
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def available(self) -> bool:
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"""Return true if the device is available and value has not expired."""
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expire_after = self._config.get(CONF_EXPIRE_AFTER)
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# pylint: disable=no-member
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return MqttAvailability.available.fget(self) and (
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expire_after is None or not self._expired
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)
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