IOT-BASED SMART IRRIGATION AND MONITORING SYSTEM

Abstract

Efficient irrigation management plays a critical role in sustainable agriculture and water 
conservation. This paper presents the design and implementation of a cloud-enabled smart irrigation 
system using the ESP32 microcontroller and the Blynk IoT platform. The system monitors soil moisture, 
temperature, and humidity in real time using an analog soil moisture sensor and a DHT22 environmental 
sensor. Based on threshold-based decision logic, a relay-controlled water pump is automatically 
activated when the soil becomes dry and deactivated when sufficient moisture is detected. 
The system integrates cloud connectivity through the Blynk IoT platform, enabling remote 
monitoring and control via a mobile dashboard. It supports both automatic irrigation mode and manual 
override mode. A 16×2 LCD provides local real-time system feedback. The proposed solution 
demonstrates a low-cost, scalable, and hybrid edge-cloud IoT architecture suitable for smart agriculture 
and small-scale irrigation systems.