Page History

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• The UNS Transmitter creates an MQTT Client
• After connection to the MQTT server, data can only be published from the MQTT Client to the MQTT Server
• Uses LWT to maintain system state awareness
  • Publishes a properties message for each tag on a client connection
• Data can be published as QoS0, QoS1 or QoS2
• The published messages can be consumed by any MQTT Client
  • The topic is the identified Ignition tag path
  • The payload contains only the tag name, dataType, value, timestamp and quality formatted as JSON
• Publishes the leaf tags of Ignition UDTs and the structure of the UDT (i.e. UDT name itself and folders in the UDT) become topic tokens
• Is limited to publishing a single data message for each tag change event