Simatupang, Frengki, Marojahan M.T Sigiro, Eka Stephani Sinambela, and Istas Pratomo Manalu. 2026. “IoT-Based Package Drop Box System Using Arduino Uno and ESP32-CAM ”. Jurnal Sistem Cerdas 8 (3). https://doi.org/10.37396/jsc.v8i3.581.