Publish–Subscribe with IoT for a Smart Soil Moisture Irrigation System

Abstract

During the last several decades, smart agriculture approaches have become increasingly popular as a means of increasing agricultural productivity. The main goals of this research were to increase crop yield and allow farmers to monitor and manage the growth of their plants in their fields using a smart platform of IoT to control the flow of water based on the moisture of the soil and provide real-time surveillance to farmers who live far away from their farms. Anyone with a smartphone can use it, and once set up; it does not need to be maintained. In this study, two levels of controller were proposed: publisher and subscriber. The master and controller of the whole sensor is the publisher, who serves as the central coordinator. In technical terms, a subscriber is referred to as a water sprinkler unit. Based on the information given by the publisher, the water sprinkler unit will deliver water to the agricultural area once the publisher advises the subscriber. In the agriculture area, four Raspberry Pi systems, Arduino boards, and soil moisture sensors were used in an experiment that yielded a successful outcome.