Mulyani, Asri, Dede Kurniadi, and Rizki Esa Saputra. “IoT-Based Real-Time River Monitoring and Early Flood Warning Using ESP32 and HC-SR04”. Journal of Novel Engineering Science and Technology 5, no. 01 (May 3, 2026): 55–62. Accessed October 8, 2026. https://journal.iistr.org/index.php/JNEST/article/view/1252.