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Summary

MQTT Store and Forward allows data to be buffered locally at a client when connections are down to the MQTT Server infrastructure and deliver that data when the connection is restored. This feature is critical in most applications because if we lose connection to the MQTT Server we will lose data if it is not buffered locally.

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If the edge node is notified that the state of the primary application is offline, tags will be stored locally until the state of the primary application is online when any stored tags will be published.

The short video below describes the benefits and use cases for MQTT Store and Forward within an Ignition system.

Additional Resources:

Ignition Video 10: Primary Host ID Setting

Ignition Video 12: Set Up Store-and-Forward System