Design and Development of an IoT-Based Blood Oxygen Level DetectionDevice for Real-Time Monitoring. Diagnosa, [S. l.], v. 2, n. 1, p. 31–37, 2026. DOI: 10.63935/wtxyrt39. Disponível em: https://journal.ajbnews.com/index.php/diagnosa/article/view/263. Acesso em: 26 mar. 2026.