Add MQTT Subscriber

Configure a MQTT Subscriber to subscribe messages to MQTT Broker on defined Topic. If a client subscribes to a Topic, it will receive all the messages that the broker forwards for that topic.
TIP: The subscriber can receive variables from other
FactoryTalk® Optix™
 clients, and other clients using the supported format.
  1. In Project view, right-click
    MQTT
    , select
    New
    , and select
    MQTT Subscriber
    .
  2. In , go to
    Subscriptions
    Subscription1
     and configure the following properties:
    Folder
    This folder node contains variables on which the Subscriber will copy the values read from the broker.
    Topic
    A single topic on a Broker to subscribe. Topic is required.
    QoS
    MQTT Quality of Service (QoS), defines the guarantee of delivery for a specific message (0, 1, 2).
    0 - At most once (May lose messages).
    1 - At least once (Guarantees the message delivery but potentially duplicate messages).
    2 - Exactly once (Ensures messages are delivered exactly once without duplication).
In
Project view
, in the
MQTT
 folder, the configured
MQTT Subscriber
 object appears.
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