Prototipação de sistema modular e escalável para controle eletrônico de acesso com integração de RFID e biometria

Abstract

Secure access to restricted areas has become an increasing concern in a variety of environments, such as commercial buildings, government facilities, and private residences. In this context, this work investigates the development of an embedded EAC system using the ESP-WROOM-32 microcontroller combined with biometric and RFID modules. The adopted methodology was Design Thinking, applied throughout ideation and iterative prototyping stages, aiming to address real security and operational needs in the intended use context. In addition, software modeling aspects are discussed with an emphasis on scalability and extensibility, achieved by encapsulating system components into C++ libraries. For validation, the prototype was deployed in a real environment and assessed by users based on TAM and a Likert-scale questionnaire. The results showed a predominance of positive responses regarding Perceived Usefulness, with full agreement on the suitability of biometrics/RFID for the context and the relevance of automatic access logging, as well as unanimous agreement that the system meets the access control needs of the environment. For Perceived Ease of Use, the system was generally regarded as simple and easy to learn, although improvement opportunities were identified related to operational stability, the clarity of display messages, and response time influenced by network connectivity.