Ihsan, M. M., and W. J. Saputro. “Implementation of a Sound Sensor-Based Automatic Light Switch Using a Wemos D1 R32 Microcontroller in a Classroom”. JOISTECH: Journal of Information System and Technology, Vol. 2, no. 2, Dec. 2025, pp. 60-65, https://mail.ejournal.darunnajah.ac.id/index.php/joistech/article/view/762.