“Simulasi Sistem Monitoring Pasang Surut Air Laut Dan Peringatan Dini Tsunami Menggunakan Sensor Hc-Sr04: Simulation of Sea Water Tide Monitoring and Tsunami Early Warning System Using HC-SR04 Sensor ”, JEITECH, vol. 1, no. 1, pp. 67–75, Jun. 2023, Accessed: Oct. 09, 2025. [Online]. Available: https://journal.unram.ac.id/index.php/jeitech/article/view/2848