Smart Onion storage Using Arduino

India ranks second in onion production in the world. Onion acquired 6% share in the production of vegetables in India. It has a wide impact on national economy and financial status of consumers/growers. The stored onions in onion in onion sheds are exposed to the hot, cold and humid air. Due to continue change in climate can rot. Once the process is iniated it grows drastically and rapidly resulting in unexpected loss. This system can help to avoid loss. Various gas sensors are used to sense emitted gases. When onions starts rotting. Developed system informs owner and also sends alert. The proposed system is performing main function measuring and monitoring the humidity, temperature and the methane concentration and notifying the user, the storage house will be ventilated and aerated sufficiently to keep the produce dry and cool.