Nur Fatehah, M. A. ., Alfindana, D. and Dermawan, B. (2025) “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, 1(1), pp. 42–57. Available at: https://ejournal.ump.ac.id/jiok/article/view/401 (Accessed: 4 April 2026).