Opto 22 posted Intro to MQTT with Sparkplug Opto 22 Woodland, WA:

Intro to MQTT with Sparkplug

Summary
In this Sparkplug for MQTT lesson, you'll learn how the Sparkplug specification enhances MQTT's State Management, Topic Name Space, and Payload format. This tutorial explains these differences and shows how they apply to use of MQTT in industrial automation.

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