Rule action: MQTT publish

The MQTT action publishes a message to a broker of your choice when a rule fires — handy for driving other systems or actuators.

Configure:

Field Meaning
mqtt_broker_url Target broker (e.g. mqtts://host:8883)
mqtt_topic Topic to publish to
mqtt_payload Message body
mqtt_qos 0, 1, or 2
mqtt_retain Retain the message on the broker
mqtt_username / mqtt_password Broker credentials

Connections are pooled and reused. MQTT actions require a plan that allows them — see plans & limits.

More in Rules & alerts
Create an alerting rule
Trigger in-app, email, webhook, or MQTT actions when a threshold is crossed.
Operators & thresholds
The comparison operators a rule can use and how scope works.
Severity & cooldown
Label urgency and prevent alert storms with a cooldown.
Rule action: email
Send an email to one or more recipients when a rule fires.
Rule action: webhook (with signature)
POST a signed JSON payload to your endpoint when a rule fires.
User Actions & the action button
Save reusable webhook/MQTT actions and trigger them from a dashboard.