Mansur, Mamad Muhamad, Rahmat Ismatullah Ibrahim, and Ade Surya Budiman. “Designing Prototype of Volume Detector for Medical Oxygen Cylinder Using NodeMCU ESP8266”. bit-Tech 6, no. 2 (December 28, 2023): 127–133. Accessed July 3, 2024. https://jurnal.kdi.or.id/index.php/bt/article/view/980.