International Journal of Scientific Research and Engineering Development

The IoT-based Smart Irrigation System using a Real-Time Clock (RTC) module is an automated solution designed to improve water management in agriculture. Traditional irrigation methods often require manual operation and fixed schedules, which can lead to water wastage and inefficient crop management. This project integrates embedded systems, sensors, and IoT technology to develop an intelligent irrigation system that automatically supplies water to plants based on soil conditions and scheduled timing. The system uses a NodeMCU (ESP8266) microcontroller as the main controller, along with a DS3231 Real-Time Clock module to maintain accurate irrigation scheduling. A soil moisture sensor continuously monitors the moisture level of the soil and sends real-time data to the microcontroller. When the soil moisture level falls below a predefined threshold and the scheduled time is reached, the system automatically activates a relay module that turns on the water pump. Once the soil reaches the desired moisture level, the pump is turned off automatically, preventing overwatering. The system also integrates IoT functionality through the Blynk platform, enabling users to monitor soil moisture levels, pump status, and irrigation schedules remotely using a smartphone. A 16×2 LCD display provides real-time information such as soil moisture percentage, current time, and motor status for local monitoring. This smart irrigation system helps conserve water, reduce human effort, and improve crop productivity by ensuring efficient and precise irrigation. It can be applied in agricultural fields, greenhouses, residential gardens, and landscaping systems to support sustainable and modern farming practices.

Om Ashok Bidave, Yash Ajay Marathe, Shrushti Vijay Nathe, Divya Sandeep Kalokhe, Prof. D.M.Bhatkar,"IOT BASED: Smart Irrigation System Using RTC Module" International Journal of Scientific Research and Engineering Development, V9(2): Page(1035-1040) Mar-Apr 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.