Layered security system on safe using RFID, finger print, camera and keypad based on Internet of Things. Journal of Industrial Automation and Electrical Engineering, [S. l.], v. 2, n. 1, p. 201–209, 2025. DOI: 10.24036/enqe3a12. Disponível em: https://jiaee.ppj.unp.ac.id/index.php/jiaee/article/view/28. Acesso em: 10 nov. 2025.