Introduction to MQTT

Contributors: Alex the Giant

Resources and Going Further

Hopefully, this tutorial has given you a starting point to integrate MQTT in your home automation project. Instead of turning a LED on or off, you could take it a step further and connect our IoT Power Relay to the ESP32 to control your AC powered devices.

IoT Power Relay

Out of stock COM-14236

Do you want to control a standard wall outlet device with your microcontroller, but don’t want to mess with the high-voltag…

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A tool not mentioned in this tutorial is Home Assistant. With Home Assistant you can control a wide array for commercial smart home devices, including MQTT. This means that with Home Assistant you can create your own MQTT devices that can easily control your existing smart home devices, but stay tuned for a tutorial about that in the future. In the mean time, there's a blog post about MQTT and Home Assistant using an ESP8266 and Raspberry Pi which can be found here:

For more information about MQTT, check out some of the links below:

• Wikipedia Article on MQTT
• MQTT Official Documentation
• Mosquitto Documentation and API Reference
• GitHub Arduino Library: PubSubClient

Need some inspiration for your next project? Check out some of these related tutorials:

Interested in learning more about WiFi?

Get a background in how WiFi works as well as the hardware available to help you connect your project wirelessly.

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