RANCANG BANGUN SISTEM PERINGATAN DINI BANJIR BERBASIS ANDROID MENGGUNAKAN ESP32 DAN SENSOR ULTRASONIK . JUPITER : Journal of Computer & Information Technology, [S. l.], v. 7, n. 1, p. 112–119, 2026. DOI: 10.53990/7dbz1r63. Disponível em: https://ojs.umbk.ac.id/index.php/jupiter/article/view/613. Acesso em: 25 aug. 2026.