Ramadhani, Syahri, and Dhanny Permatasari Putri. “Design of a Home Door Security System Based on NodeMCU ESP32 Using a Magnetic Reed Switch Sensor and Telegram Bot Application”. Sinkron : jurnal dan penelitian teknik informatika 7, no. 4 (October 1, 2023): 2059-2068. Accessed July 16, 2024. https://jurnal.polgan.ac.id/index.php/sinkron/article/view/12688.