Uploaded November 2023 | Updated September 2026, 3 hours ago

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Mosquitto is a popular MQTT Broker for Home Assistant and is used for communication by many IoT devices, including Tasmota, Shelly and many more.

I explain how MQTT works, some of it's important settings and typical uses.

MQTT is a messaging based communication system with one broker and many clients connecting to that broker to exchange information.

MQTT Broker Benchmark: emqx.com/en/blog/open-mqtt-benchmarking-comparison-mqtt-brokers-in-2023
Victron Venus OS Docs: victronenergy.com/live/open_source:start
Mikrotik MQTT Documentation: help.mikrotik.com/docs/display/ROS/MQTT

00:00 Intro
01:20 MQTT Brokers - Mosquitto, RabbitMQ & HiveMQ
02:05 Tasmota Open Source Firmware for ESP8266 & ESP32 Devices
02:50 Shelly Devices - Built-in MQTT Support
03:32 Victron & MQTT - CerboGX, Multiplus II, Charge Controllers etc
05:03 Blue Iris - Built-in MQTT Support for motion alerts
06:05 Mikrotik Routers and Switches Support MQTT!
06:43 MQTT Explanation
07:07 MQTT Explanation - Topic
07:47 MQTT Explanation - QoS - Quality of Service
08:40 MQTT Explanation - Keep Alive Duration
09:04 MQTT Explanation - LWT - Last Will Testament
09:50 MQTT Explanation - Retain Flag
11:14 MQTT Explanation - Persistence
11:26 MQTT Explorer App for inspecting broker messages
11:53 Home Assistant MQTT Services
12:23 Outro

#mqtt #homeassistant #victron