Development of a low-cost NTP stratum 2 time synchronization system with hybrid RTC/NTP failover for remote Indonesian mosques. J. Soft Comput. Explor. [Internet]. 2025 Nov. 15 [cited 2026 Aug. 25];6(3):199-205. Available from: https://shmpublisher.com/index.php/joscex/article/view/570