รัตนกร น., & Photong, C. (2021). Low-cost Solar Insolation Measurement System using Estimation Technique from the Brightness Sensor. Rajamangala University of Technology Srivijaya Research Journal, 13(2), 382–392. Retrieved from https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/227389