Waliulu, R. F., Hendriawan, A., Pramono, A., & Supardi, S. (2021). PROTOTYPE DETEKSI OBJEK MENGGUNAKAN RASPBERRY PI MELALUI MODUL SENSOR ULTRASONIK HC-SR04. JPB : Jurnal Patria Bahari, 1(2), 53-57. https://doi.org/10.54017/jpb.v1i2.22