Desarrollo de un sistema automático de irrigación para huertos caseros por medio de IoT con software y hardware libre

Abstract

The following technical project presents an irrigation system for home gardens that works using free software and hardware. The open-source platform called Openhab is used to automate the home garden, this platform allows the creation of a private cloud with which the user can interact with the irrigation system from anywhere in the world. The system integrates an IoT architecture with three Esp32 modules that are programmed with the MQTT protocol and communicate through a Raspberry pi, which will be the Broker in this implementation, it contains the Openhab platform installed in it. The first Esp32 module contains a flow sensor and is in charge of activating and deactivating the solenoid valves that allow irrigation of the orchard. Through Openhab graphical interface, the user can select the amount of water to irrigate and the soil moisture threshold parameters, all of this will depend on the seasons of the year, since in winter the plantation will need less water. The second module Esp32 sends the soil humidity values registered with capacitive soil humidity sensors to the Broker, which by means of a rule programmed in Openhab, sends the order to activate each solenoid valve. The third module Esp32 sends the values of humidity and temperature of the environment to the Broker and turns on a luminaire for a better visualization in low light conditions inside the orchard.