Adan, . N. F., Abdul Hakim, D. N. D. ., Syed Jafri, S. S. E. ., Sukelan, N. S., & Ahmad, M. S. . (2020). A Simulation Approach to IoT Based Safety Keychain Device Using Proteus Software. Multidisciplinary Applied Research and Innovation, 2(1), 380-388. https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/401