Hutahaean, Yoslina, Dini Hapsari, and Dian Rusdiyanto. “Design of a Monitoring Device and System for Measuring Heart Rate, Oxygen Saturation and Body Temperature Based on the Internet of Things (IoT)”. JTEIN: Jurnal Teknik Elektro Indonesia 6, no. 1 (February 11, 2025): 1-10. Accessed February 22, 2025. http://jtein.ppj.unp.ac.id/index.php/JTEIN/article/view/704.