IoT-based Estimation System for Microcystis aeruginosa Cyanobacteria in Laguna de Bay using an Arduino-controlled Spectrophotometric DeviceLawrence D. Alejandrino, Jessica Joy D. Jocson, Micah Romina R. Mirarza, Ericson D. Dimaunahan, Ramon G Garcia and Flordeliza L ValienteE3S Web Conf., 325 (2021) 04007DOI: https://doi.org/10.1051/e3sconf/202132504007