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Video 46: IoT Communication with MQTT
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Learn how to integrate an ESP32 microcontroller with a temperature sensor, LED, and push button for MQTT communication in this comprehensive tutorial.

* **Introduction**: Discover how to use an ESP32 microcontroller with a temperature sensor, LED, and push button.
* **MQTT Protocol**: Understand the lightweight, bidirectional, and scalable nature of MQTT, along with its reliability and security features.
* **Wiring Setup**: Get insights into the wiring connections required for the temperature sensor, LED, and push button.
* **Arduino Code Explanation**: Dive into the Arduino code setup, including Wi-Fi configuration, MQTT client setup, and message handling.
* **Board and COM Port Selection**: Learn how to select the ESP32 board and COM port in the Arduino IDE.
* **HiveMQ Free Broker Demonstration**: See a step-by-step demonstration of using the HiveMQ Free broker for MQTT communication, including publishing temperature data and controlling the LED remotely.


**Video**

.. raw:: html

    <iframe width="700" height="500" src="https://www.youtube.com/embed/XwTCfnHDASg?si=G1BCxFaUY5uaZdQ0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

.. **Related On-line Tutorials**

.. * :ref:`ar_iot_mqtt`