Development of data terminal for wireless sensor network

In wireless sensor network (WSN), gateway is the bridge connecting wireless sensor networks and the external network. Based on ARM9 and embedded Linux system, a multi-function data terminal was designed which used for data transmission, data real-time display, data local storage and historical data query, including hardware and software. The hardware is mainly consisted of an ECU, a GPRS module, several wireless sensors. And the software is composed of interface module, dialing module, remote data transmitting module, and data collecting module. The system is multi-function and has wide applications. Graphical interfaces illustrate the function above using MINIGUI, and can be operated by touch screen easily. Through the experiment in lab, the multi-function data terminal designed can work stably and reliably, and is worth of practical application.