Putri, Suci Yulia, and Nini Firmawati. “Rancang Bangun Pengukur Kadar Gula Darah Non-Invasive Berbasis NodeMCU ESP8266”. Jurnal Fisika Unand, vol. 11, no. 2, Apr. 2022, pp. 271-7, doi:10.25077/jfu.11.2.271-277.2022.