GPRS and WEB based data acquisition system for greenhouse environment

Aiming at the characteristics of the diversity, volatile variation, remote distribution for agricultural objects, a technical solution of a GPRS and WEB based monitoring and publishing system for greenhouse environment information was presented. First, a RS-485 bus cable as a middle bridge was used to connect the PC and digital sensors together forming a field monitoring system. Second, connection was established between field computer and INTERNET through GPRS wireless module so that the real-time field data could be transferred to the remote database server. The software was developed with Microsoft VB.NET and ASP.NET criterion under the B/S(Browser-Server) thin client mode. In this mode, users could not only check real time data coming from remote field site, but could visit historical data just by a client browser. The result showed that this system provided a flexible solution to solve the bottle-neck problem of so called "final one kilometer" phenomenon for web based application of agricultural information communication.