Rancang Bangun Sistem IoT untuk Monitoring Ketinggian Air Sungai Menggunakan NodeMCU dan Sensor Ultrasonik HC-SR04 Terintegrasi Website. HORIZON: Indonesian Journal of Multidisciplinary, [S. l.], v. 4, n. 3, p. 1283–1291, 2026. DOI: 10.54373/hijm.v4i3.5834. Disponível em: https://ejournal.indo-intellectual.id/index.php/hijm/article/view/5834. Acesso em: 12 aug. 2026.