57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
"""
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Offer MQTT listening automation rules.
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For more details about this automation rule, please refer to the documentation
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at https://home-assistant.io/docs/automation/trigger/#mqtt-trigger
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"""
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import asyncio
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import json
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import voluptuous as vol
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from homeassistant.core import callback
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import homeassistant.components.mqtt as mqtt
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from homeassistant.const import (CONF_PLATFORM, CONF_PAYLOAD)
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import homeassistant.helpers.config_validation as cv
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DEPENDENCIES = ['mqtt']
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CONF_TOPIC = 'topic'
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TRIGGER_SCHEMA = vol.Schema({
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vol.Required(CONF_PLATFORM): mqtt.DOMAIN,
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vol.Required(CONF_TOPIC): mqtt.valid_subscribe_topic,
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vol.Optional(CONF_PAYLOAD): cv.string,
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})
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@asyncio.coroutine
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def async_trigger(hass, config, action):
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"""Listen for state changes based on configuration."""
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topic = config.get(CONF_TOPIC)
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payload = config.get(CONF_PAYLOAD)
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@callback
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def mqtt_automation_listener(msg_topic, msg_payload, qos):
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"""Listen for MQTT messages."""
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if payload is None or payload == msg_payload:
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data = {
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'platform': 'mqtt',
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'topic': msg_topic,
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'payload': msg_payload,
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'qos': qos,
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}
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try:
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data['payload_json'] = json.loads(msg_payload)
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except ValueError:
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pass
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hass.async_run_job(action, {
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'trigger': data
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})
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remove = yield from mqtt.async_subscribe(
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hass, topic, mqtt_automation_listener)
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return remove
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