Page History

...

The topology of this example shows MQTT Distributor, MQTT Engine, and MQTT Transmission all running in the same Ignition instance.  This is done for simplicity of the tutorial.  But, this isn't required or even intended to be a real use case.  In a more realistic scenario the MQTT Transmission and MQTT Engine would be located on separate machines.

Variations:

This tutorial shows how to use OPC tags and MQTT Transmission to generate MQTT messages based on tag change events.  However, the tag source does not have to be an OPC tag.  Instead, as long as the tag structure for MQTT Transmission is followed, any Ignition Tag can be used to generate MQTT messages and/or be controlled via MQTT messages.

Sending OPC Tag Data with Transmission:

...