Authors: P. Akilan, T.Ananth Kumar, K.Jayasurya, Dr.T.Sengolrajan
Abstract: Post-harvest onion losses due to inadequate storage conditions continue to pose a major challenge in the agricultural sector, particularly for small and marginal farmers. Improper ventilation, excess humidity, and temperature fluctuations often lead to sprouting, rotting, and significant economic losses. To address this issue an IoT-based Smart Onion Preservation System has been developed to maintain optimal environmental conditions within the storage unit. The system continuously monitors temperature and humidity levels with help of DHT11 Sensor and placed inside the storage chamber. Based on real-time data the system automatically controls with ESP32 Micro-controller to automate 60 W incandescent bulb to regulate airflow and maintain suitable tempera-ture levels. The exhaust fan helps remove excess moisture and heat while the bulb provides con-trolled warmth when required. Additionally, natural materials such as river sand, charcoal powder and dry coconut leaf fibers are incorporated to enhance moisture absorption, improve air quality and reduce odor. This integration of IoT technology with eco-friendly materials ensures energy efficiency, low operational cost and reliable performance. The system is compact, affordable and particularly suitable for small-scale onion storage appl cations in rural areas.
DOI: https://doi.org/10.5281/zenodo.18832824
