2025. IoT-based material height monitoring and temperature-humidity control system with ESP32 on a Dosimat Feeder Hopper at PT. Semen Padang. Journal of Industrial Automation and Electrical Engineering. 2, 2 (Dec. 2025), 159–169. DOI:https://doi.org/10.24036/jiaee.v2.i2.pp159-169.