NUR FATEHAH, M. A. .; ALFINDANA, D.; DERMAWAN, B. Design and Development of a Running Speed Timer Device Using a Microcontoller-Based Internet of Things (IoT) System for Elementary Schools. JURNAL ILMU OLAHRAGA DAN KESEHATAN, [S. l.], v. 1, n. 1, p. 42–57, 2025. Disponível em: http://ejournal.ump.ac.id/index.php/jiok/article/view/401. Acesso em: 6 jul. 2026.