Zhafira, Mutia, and Juli Sardi. “Implementation of Internet of Things (IoT) In Heart Rate Measurement Tool”. JTEIN: Jurnal Teknik Elektro Indonesia 5, no. 1 (February 25, 2024): 99–110. Accessed September 26, 2026. http://jtein.ppj.unp.ac.id/index.php/JTEIN/article/view/581.