R. Muhida, M. Riza, A. Harsoyo, H. Murwadi, and A. Legowo, “Utilization of IoT for Measuring Hydrogen Production in a Photovoltaic-Solid Polymer Electrolyte (PV-SPE) System ”, J. of App. Sci. & Adv. Eng., vol. 3, no. 1, pp. 37–41, Mar. 2025.