Análise e desenvolvimento de um sistema de automação com base no protocolo MQTT

Abstract

This thesis presents the implementation of a home automation prototype using the ESP32 board and the MQTT protocol, recognized for its lightweight and flexible characteristics in IoT applications. A system was developed in a simulated environment, achieving stable communication, validation of Quality of Service (QoS) levels, and the use of the retain function for message persistence. Tests confirmed the solution's viability, despite limitations in the simulated environment, such as the absence of encryption and physical sensor testing. The results indicate that the MQTT protocol combined with ESP32 is an efficient solution for small-scale home automation. Expanding the work to incorporate real hardware, a Raspberry Pi 3B was used to host a local broker and leverage GPIO pins to connect a display for message visualization, with potential for integrating larger or serial displays for more complex applications. Additionally, remote notifications were implemented via a Telegram bot, enabling instant feedback on system states through mobile phones and smartwatches.