Dimyati , Achmad, Inayatul Inayah, Lis Sa’odah, and M. Yusuf. “Development of An IoT-Based Heart Rate Monitoring System Using Android Application”. Elinvo (Electronics, Informatics, and Vocational Education) 10, no. 2 (December 2, 2025): 169–180. Accessed January 20, 2026. https://journal.uny.ac.id/index.php/elinvo/article/view/89724.