Indah Purnama Sari, Mulkan Azhari, Ahmad Riady Hasibuan. Design and Construction of Room Door Security Using ESP 32 Cam and Blynk Based on Internet of Things. Altafani. 2024;1(2). Diakses November 14, 2026. https://jurnal2.umsu.ac.id/index.php/altafani/article/view/71