Presence system using RFID and ESP32 CAM based on Internet of Things. Journal of Industrial Automation and Electrical Engineering, [S. l.], v. 1, n. 2, p. 126–131, 2024. DOI: 10.24036/1gjrcw29. Disponível em: https://jiaee.ppj.unp.ac.id/index.php/jiaee/article/view/92. Acesso em: 13 jul. 2025.