“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 ” (2023) JEITECH (JOURNAL OF ELECTRICAL ENGINEERING, INFORMATION TECHNOLOGY, CONTROL ENGINEERING, AND ROBOTIC), 1(1), pp. 67–75. Available at: https://journal.unram.ac.id/index.php/jeitech/article/view/2848 (Accessed: 9 October 2025).