Rahma, P.M., Riyadi, R.S., Shafina, S.A., Mahardika, R. and Suroni, A. 2026. IoT-Based Campus Parking Slot Monitoring System via Ultrasonic Sensors with Real-Time Web Visualization. Journal of Informatics Information System Software Engineering and Applications (INISTA). 8, 2 (Jun. 2026), 121-131. DOI:https://doi.org/10.20895/inista.v8i2.2056.