Hafiz Mohd Khanil; Pooi Ying Choong; Yaw Long Chua; Yit Yan Koh. Development of Observation System Using Internet of Things for Growth Improvement in Indoor Farming of Apium Graveolens Var. Secalinum Alef. J. Adv. Res. Appl. Sci. Eng. Tech. 2023, 32, 360-369.