M. N. A. Jam, L. . Bakar, and Z. Abdul Wahab, “Heart Rate Monitoring Robot by Using Arduino and NodeMCU ESP8266”, peat, vol. 3, no. 2, pp. 363–372, Dec. 2022, Accessed: May 01, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6125