Arm9-based Wireless Sensor Network Design

With the development of modern computer technology, communication networks and embedded systems, the traditional mode of life will gradually tend to be portable and intelligent. Remote intelligent home control system was borned, which spread the operational status of field devices to the WEB server with embedded web technology and network communication technology, so that you can use a standard browser to access the dynamic pages in the embedded server. The development of wireless technology promote that wireless technology applied to the RMON to replace wired technology, This article was designed based on the ZigBee networking technology of remote wireless home lighting control system to achieve the user to control the LED lights through the WEB Network. The main content of the thesis is as follows:(1) In combination with other wireless solutions, dissertation will describe the advantages of ZigBee protocol in wireless smart home control system.(2) The dissertation analysised all levels of the ZigBee protocol and designed the system at the application layer, then the dissertation researched the system topology, network configuration, network structure, node binding and data transmission, at last the dissertation described the three kinds of ZigBee terminals and address given in algorithm analysis.Finally the star network and wireless sensor controlled LED lighting node ad hoc network combined with the general home environment.(3) In accordance with the requirements of the system, the dissertation designed the part of the ZigBee RF module PCB and the microstrip antenna, software part consist of the application layer of the ZigBee protocol and serial communications and the communication between the various nodes.(4) The dissertation gives a detailed study about the temperature and voltage, and brightness adjustment, LED driver PCB of LED lights as the representative of the household appliances.(5) To build a platform for the system it writes the bootloader and the transplant file system and kernel, then rewritten the network protocol driver.(6) Through a remote web server program, it access the local data dynamically and give the remote control after transplanting BOA to the WEBSERVER.(7) Finally, it gives the system testing, including test of the serial network interface testing, and test part of the ZigBee protocol.The tests show that the sensor data collected by the ZigBee protocol in each node mutual transmission and the transmission rate is up to250kbps, the coordinator can transmitted the data to the ARM9server by the serial port, and it also can transmitte a remote web page through the network interface. Users only need click on a remote web page and thar will control the local environment and the electrical, so It really achieves the purpose of remote control, and it has a great applicable value.