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Fabian Affolter 2015-10-21 19:39:31 +02:00
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source/components/sensor.mqtt.markdown
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@ -10,10 +10,9 @@ 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.
This MQTT 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.
To use your MQTT sensor in your installation, add the following to your `configuration.yaml` file:
```yaml
# Example configuration.yml entry