Wivanius, Nadhrah, Heru Wijanarko, and Taufik Ramadhan Novian. “Sistem Keamanan Loker Berbasis GSM Module, Bluetooth Module Dan Reed Sensor”. Jurnal ELEMENTER (Elektro dan Mesin Terapan) 5, no. 1 (May 31, 2019): 38–47. Accessed May 4, 2024. https://jurnal.pcr.ac.id/index.php/elementer/article/view/2513.