It would seem so if you look at the sidebar help
mqtt out
Connects to a MQTT broker and publishes messages.
payload string | buffer
the payload to publish. If this property is not set, no message will be sent. To send a blank message, set this property to an empty String.
topic string
the MQTT topic to publish to.
qos number
0, fire and forget - 1, at least once - 2, once and once only. Default 0.
retain boolean
set to true to retain the message on the broker. Default false.
responseTopic string
MQTTv5 : the MQTT response topic for the message
correlationData Buffer
MQTTv5 : the correlation data for the message
contentType string
MQTTv5 : the content-type of the payload
userProperties object
MQTTv5 : any user properties of the message
messageExpiryInterval number
MQTTv5 : the expiry time, in seconds, of the message
topicAlias number
MQTTv5 : the MQTT topic alias to use
msg.payload
is used as the payload of the published message. If it contains an Object it will be converted to a JSON string before being sent. If it contains a binary Buffer the message will be published as-is.
The topic used can be configured in the node or, if left blank, can be set by msg.topic
.
Likewise the QoS and retain values can be configured in the node or, if left blank, set by msg.qos
and msg.retain
respectively. To clear a previously retained topic from the broker, send a blank message to that topic with the retain flag set.
This node requires a connection to a MQTT broker to be configured. This is configured by clicking the pencil icon.
Several MQTT nodes (in or out) can share the same broker connection if required.
Dynamic Control
The connection shared by the node can be controlled dynamically. If the node receives one of the following control messages, it will not publish the message payload as well.
action string
the name of the action the node should perform. Available actions are: "connect"
, and "disconnect"
.
broker broker
For the "connect"
action, this property can override any of the individual broker configuration settings, including:
broker
port
-
url
- overrides broker/port to provide a complete connection url
username
password
If this property is set and the broker is already connected an error will be logged unless it has the force
property set - in which case it will disconnect from the broker, apply the new settings and reconnect.