Hua, Li, Xu Da, and Fuquan Zhao. “Design of a State Monitoring System for Equipment Based on the Zigbee Wireless Sensor Network”. International Journal of Online and Biomedical Engineering (iJOE) 12, no. 06 (June 30, 2016): pp. 20–23. Accessed April 27, 2024. https://online-journals.org/index.php/i-joe/article/view/5516.