Dimmer with ESP8266/ESP32 MQTT – Publish and Subscribe with Arduino IDE. Connecting to Home Assistant, Node-RED, Amazon AWS, and openHAB

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Mar 06, 2025 6:52 am

(@shavkatzh)

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Link to project: https://rbdimmer.com/dimmer-with-esp8266-esp32-mqtt-publish-and-subscribe-with-arduino-ide-connecting-to-home-assistant-node-red-amazon-aws-and-openhab/

This project shows how to use MQTT communication protocol with the ESP32 to publish messages and subscribe to topics from MQTT broker under servers like Home Assistant, Node RED, Amazon AWS, and openHAB. As an example, we’ll control the dimmer. The server can be either local or on the cloud.

The ESP32 we’ll be programmed using Arduino IDE. The PubSubClient library provides a client for doing simple publish/subscribe messaging with a server that supports MQTT.

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Dimmer with ESP8266/ESP32 MQTT – Publish and Subscribe with Arduino IDE. Connecting to Home Assistant, Node-RED, Amazon AWS, and openHAB