Design of monitoring system for grain depot based on ZigBee technology

As the environmental parameters monitoring points for large scale grain depot facilities were scattered, a wireless sensor network central monitoring system was designed with the structure of hierarchical network topology. CC2430 chip with ZigBee technology was considered as the core of information processing and wireless nodes detection. The terminal child-nodes of the wireless sensor network was established with temperature and humidity sensors. The system implemented real-time circumstances monitoring at the scene, and transferred data by routing nodes. The routing nodes module corresponded with central node in wireless or RS-485 manner; as a result the detecting information at the scene was transferred to central monitoring computer in real time. The system fulfilled multi-point and real-time detecting inside the grain depot. Results show that the system has the characteristics of good expansibility, networking flexibility and low cost. The design lays a foundation for modern management of large scale grain depot facilities.