MQTT Explained: The Protocol Powering Every Smart Home

MQTT (Message Queue Telemetry Transport) is the lightweight, low-bandwidth messaging protocol that lets tiny devices chat like they’re in a group DM. In this video I break down what MQTT is, why it exists, and how you actually use it in real world scenarios. As promised, here is a link where you can see more in-depth information about QoS (as well as a deep-dive into all of MQTT!): https://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levels/ Chapters 00:00 Intro 00:18 MQTT in a nutshell 01:05 Quick history 01:53 Basic terms 03:03 QoS levels 04:39 Wildcards 05:03 Retained messages 05:22 Last will, birth & close messages 05:52 Sessions 06:24 Smart-home example 07:23 What MQTT isn’t 07:58 Rules of thumb 09:31 Wrap-up Check out other videos in my "What the heck" series: https://www.youtube.com/playlist?list=PLQ4XUMXxWfD8EVleJDWQ-gWtoi4SU3pVk #mqtt #iot #smarthome #iotplatform #iotsoftware #explained #flow #programming #industrial #nodered