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Beginner's Guide: Building an ESP32 IoT Project with MQTT Protocol

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A tutorial published on DEV Community walks beginners through building a basic IoT project using the ESP32 microcontroller and the MQTT communication protocol. The ESP32 is a low-cost device with built-in Wi-Fi and Bluetooth, making it suitable for projects ranging from smart agriculture to energy monitoring without needing extra networking hardware. MQTT's publish/subscribe model allows the ESP32 to send sensor data to a broker, which then forwards it to a subscribing dashboard or application. The tutorial outlines a simple data pipeline — sensor to ESP32 to Wi-Fi to MQTT broker to an IoT dashboard — using tools like the DHT11 temperature sensor and platforms such as KiwisIoT for visualization. The guide emphasizes that the same core architecture can be adapted across multiple use cases by simply swapping the sensor while keeping the underlying connectivity framework intact.

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Beginner's Guide: Building an ESP32 IoT Project with MQTT Protocol · ShortSingh