R. F. Chai and Chua King Lee, “Global System for Mobile Communication Based Automated Billing System for Electric Energy Meter”, EEEE, vol. 2, no. 2, pp. 979–988, Nov. 2021, Accessed: Jul. 18, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/3929