Setiawan, Dede, Febri Haswan, and Jasri Jasri. “Design of School Bell Scheduling Application Based on Arduino Uno on MTs Babussalam Simandolak”. JURNAL TEKNOLOGI DAN OPEN SOURCE 7, no. 1 (July 1, 2024): 22 - 30. Accessed December 21, 2024. http://ejournal.uniks.ac.id/index.php/JTOS/article/view/3867.