Putri Madonaa, Rahmat Ilias Bastia, Muhammad Mahrus Zainb Department of Electronics Engineering, Politeknik Caltex Riau, Riau 28261, Indonesia Department of Information System Engineering, Politeknik Caltex Riau, Riau 28261, Indonesia https://www.gacetasanitaria.org/en-pqrst-wave-detection-on-ecg-articulo-S0213911121002466 Setup: Raspberry Pi 3b & AD8232 POLITEKNIK CALTEX RIAU https://pcr.ac.id/en/history