Suwarno, I., Ma’arif, A., Raharja, N. M., Hariadi, T. K., & Shomad, M. A. (2022). Using a Combination of PID Control and Kalman Filter to Design of IoT-based Telepresence Self-balancing Robots during COVID-19 Pandemic. Emerging Science Journal, 4, 241–261. https://doi.org/10.28991/esj-2021-SP1-016