home-assistant.io/source/components/sensor.mqtt.markdown

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layout	title	description	date	sidebar	comments	sharing	footer
page	MQTT Sensor support	Instructions how to integrate MQTT sensors within Home Assistant.	2015-05-30 23:21	false	false	true	true

This generic sensor implementation uses the MQTT message payload as the sensor value. If messages in this state_topic are published with RETAIN flag, the sensor will receive an instant update with last known value. Otherwise, the initial state will be undefined.

# Example configuration.yml entry
sensor:
  platform: mqtt
  name: "MQTT Sensor"
  state_topic: "home/bedroom/temperature"
  qos: 0
  unit_of_measurement: "°C"

• name: The name of the sensor. Default is 'MQTT Sensor'. Optional
• state_topic: The MQTT topic subscribed to receive sensor values. Required
• qos: The maximum QoS level of the state topic. Default is 0. Optional
• unit_of_measurement: Defines the units of measurement of the sensor, if any. Optional