Diseño e implementación de un sistema IoT para la automatización y monitoreo de TDS (Total de Solidos Disueltos) en un módulo hidropónico a escala

Abstract

This project aims to design and implement a fuzzy control system for a lettuce hydroponic system, in order to maintain key parameters such as pH and TDS (Total Dissolved Solids) within optimal ranges for plant growth. . The system consists of three tanks: one with a mixture of nutrient solution and water, another with just water, and the third with just nutrient solution. Solenoid valves and a pump are used to control the passage of water and nutrients in the system, adjusting injection times based on pH and TDS values. Fuzzy control is implemented using a Mamdani model with discrete centroid defuzzification, and measurements are performed every 10 minutes. The ideal pH and TDS values ​​are 6 and 800 ppm, respectively, and the system is designed to maintain these values ​​within an optimal range by continuously monitoring and adjusting the activation times of the solenoid valves. The solution is flexible, efficient and seeks to minimize resource waste while improving the growth of lettuce in the hydroponic system.