Sistema de Automação Residencial de Baixo Custo com Processamento Local

Abstract

This work presents the development of a low‑cost, secure, adaptable home automation system with local processing, aiming to broaden access to home automation and allow users to choose to process their data locally. The system uses an ESP32 microcontroller for control of lighting, gates, alarm and other actuators, and a Raspberry Pi 4 for local voice recognition via the VOSK library. To demonstrate operation, a 1:20‑scale model was built, designed in CAD and 3D printed, integrating reed sensors, DC motors, relays, LED strips and an electromagnet, simulating a complete residential environment. The design allows reuse of existing electrical infrastructure, preserving switches and outlets, and dispenses with continuous Internet connection, ensuring privacy and operation in locations without connectivity. Results indicate the feasibility of a functional, low‑cost system, independent of Internet connection.