360 Tech Engineering
Nov 27, 2020 · Fundamentals
Understanding MQTT Publish and Subscribe: Message Formats, QoS Levels, Retain Flags, and Acknowledgments
This article explains how MQTT handles message publishing and subscribing, covering topic structures, QoS levels, retain flags, payload details, duplicate fields, subscription formats, packet identifiers, subscription acknowledgments, and unsubscribe procedures, providing a comprehensive overview of the protocol's messaging workflow.
IoTMQTTMessage Queuing
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