title: A monitoring system for vegetable greenhouses based on a wireless sensor network.
abstract: A wireless sensor network-based automatic monitoring system is designed for monitoring the life conditions of greenhouse vegetables. The complete system architecture includes a group of sensor nodes, a base station, and an internet data center. For the design of wireless sensor node, the JN5139 micro-processor is adopted as the core component and the Zigbee protocol is used for wireless communication between nodes. With an ARM7 microprocessor and embedded ZKOS operating system, a proprietary gateway node is developed to achieve data influx, screen display, system configuration and GPRS based remote data forwarding. Through a Client/Server mode the management software for remote data center achieves real-time data distribution and time-series analysis. Besides, a GSM-short-message-based interface is developed for sending real-time environmental measurements, and for alarming when a measurement is beyond some pre-defined threshold. The whole system has been tested for over one year and satisfactory results have been observed, which indicate that this system is very useful for greenhouse environment monitoring.
authors.affiliation: College of Global Change and Earth System Science, Beijing Normal University, Xinjiekouwai Street No.19, Beijing, 100875, China. lixiuhong_bj@sina.com.cn
authors.forename: Xiu-hong
authors.initials: XH
authors.lastname: Li
authors.forename: Xiao
authors.initials: X
authors.lastname: Cheng
authors.forename: Ke
authors.initials: K
authors.lastname: Yan
authors.forename: Peng
authors.initials: P
authors.lastname: Gong
mesh_terms: D003195:Computer Communication Networks / Q000295:instrumentation*; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D008838:Microcomputers; D013686:Telemetry / Q000295:instrumentation / Q000379:methods; D014675:Vegetables / Q000254:growth & development*; D059015:Wireless Technology / Q000295:instrumentation*