Mohd Ridhuan, Amir Umar, and Ramhuzaini Abd Rahman. 2022. “Study of Soil Quality (Moisture and PH) Upon the Growth of Okra Plant Using IoT Technique”. Research Progress in Mechanical and Manufacturing Engineering 3 (1):290-97. https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/3846.