core/homeassistant/components/device_tracker/mqtt.py

43 lines
1.1 KiB
Python

"""
Support for tracking MQTT enabled devices.
For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/device_tracker.mqtt/
"""
import logging
import homeassistant.components.mqtt as mqtt
from homeassistant import util
DEPENDENCIES = ['mqtt']
CONF_QOS = 'qos'
CONF_DEVICES = 'devices'
DEFAULT_QOS = 0
_LOGGER = logging.getLogger(__name__)
def setup_scanner(hass, config, see):
"""Setup the MQTT tracker."""
devices = config.get(CONF_DEVICES)
qos = util.convert(config.get(CONF_QOS), int, DEFAULT_QOS)
if not isinstance(devices, dict):
_LOGGER.error('Expected %s to be a dict, found %s', CONF_DEVICES,
devices)
return False
dev_id_lookup = {}
def device_tracker_message_received(topic, payload, qos):
"""MQTT message received."""
see(dev_id=dev_id_lookup[topic], location_name=payload)
for dev_id, topic in devices.items():
dev_id_lookup[topic] = dev_id
mqtt.subscribe(hass, topic, device_tracker_message_received, qos)
return True