ARAPA, Alman; SARI, Selvi Mayang; SETYOWATI, Rika; MUSAWWIR, Ahmad; SARWONO. Conceptual Design of an ESP32-Ultrasonic-Based Patient Visitor Counting System for Health Information Education. Journal of Information Systems and Technology Research, [S. l.], v. 5, n. 3, p. 369–378, 2026. DOI: 10.55537/jistr.v5i3.1866. Disponível em: https://journal.aira.or.id/jistr/article/view/1866. Acesso em: 6 sep. 2026.