1Department of Information Technology, Rajalakshmi Engineering College, Chennai, Tamil Nadu, India 2Department of Computer Science and Engineering, R.M.D. Engineering College, Kavaraipettai, Tamil Nadu, India DOI 10.7717/peerj-cs.1871 Academic Editor Valentina Emilia Balas Subject Areas Artificial Intelligence, Real-Time and Embedded Systems Keywords Automatic hydroponic, Nutrient estimator, Mask R-CNN, Arduino UNO, IoT sensors, Micro nutrients, Macro nutrients, Region proposal network...