MQTT Subscribe Trigger

Overview

MQTT Subscribe Trigger starts a flow when a message is received on a subscribed MQTT topic.

Use this trigger for event-driven flows that react to broker messages from sensors, services, or devices.

Input

MQTT Setup Tool

string required

Reference to a configured MQTT Client Initialization node.

Topic to Subscribe

string required

MQTT topic filter to listen to, for example home/sensor/temperature.

Quality of Service (QoS)

integer

Requested MQTT QoS level:

• 0
• 1
• 2

Default: 0

Output

Received Topic

string

Actual topic that delivered the message.

Message Payload

string

Raw message payload content.

Received QoS

integer

QoS level for the received message.

Retain Flag

boolean

Indicates whether the received message was a retained broker message.