mirror of
https://github.com/home-assistant/home-assistant.io.git
synced 2025-05-06 19:18:59 +00:00
34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
---
|
|
layout: page
|
|
title: "MQTT Sensor support"
|
|
description: "Instructions how to integrate MQTT sensors within Home Assistant."
|
|
date: 2015-05-30 23:21
|
|
sidebar: false
|
|
comments: false
|
|
sharing: true
|
|
footer: true
|
|
---
|
|
|
|
<img src='/images/supported_brands/mqtt.png' class='brand pull-right' />
|
|
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.
|
|
|
|
```yaml
|
|
# Example configuration.yml entry
|
|
sensor:
|
|
platform: mqtt
|
|
state_topic: "home/bedroom/temperature"
|
|
name: "MQTT Sensor"
|
|
qos: 0
|
|
unit_of_measurement: "°C"
|
|
```
|
|
|
|
Configuration variables:
|
|
|
|
- **state_topic** (*Required*): The MQTT topic subscribed to receive sensor values.
|
|
- **name** (*Optional*): The name of the sensor. Default is 'MQTT Sensor'.
|
|
- **qos** (*Optional*): The maximum QoS level of the state topic. Default is 0.
|
|
- **unit_of_measurement** (*Optional*): Defines the units of measurement of the sensor, if any.
|