Devya, and Shib Sankar Das. “Design and Implementation of a Low-Cost, High-Density IIoT Gateway for Smart Factory Monitoring Using ESP32”. International Journal of Innovations in Science, Engineering And Management 5, no. 2 (June 2, 2026): 364–375. Accessed July 25, 2026. https://ijisem.com/journal/index.php/ijisem/article/view/571.