MQTT Demo

[TechSolomon]

Diagram

graph TD;
    Input_1-->MQTT;
    Input_2-->MQTT;
    Input_3-->MQTT;
    MQTT-->Subscriber;
    MQTT-->Re-publisher;

[dayne]

This is a good representation of the MQTT message bus on the private/secure network (inside).

The second phase would be then to show the replication of the data collection/system state that is available on a second network that by re-publishing/streaming the system state information available on the private MQTT bus to an outside/public MQTT bus so a second HMI system can be made available.

Here is a rough diagram of that second phase integrating the data diode: