| Wireless Sensor Network(WSN) is mainly designed for tracking and monitoring purpose. So far, many proposals and works have been made for applications, routing, and link layers in WSN. However, less work has been done in monitoring,managering and controlling of the nodes themselves. If the nodes are deployed where the maintenance is extremely hard, system robustness is one of biggest concern. In this paper, to address this challenge, one-key recovery is introduced and error messages are sent from nodes to gateway even center of control. We can then hold a restore key in the sensor node or send a recovery command from gateway to the nodes so that rolling the system back to the initial state. In addition, a visibility friendly graphic user interface make users efficiently manage any of nodes.In this thesis, the core of hardware platform is CC2530 chip system developed by TI and equipped with a touch screen for gateway. The software system is developed based on Linux to facility the visualization operation while the core of node system is Z-Stack protocol stack developed by TI. We mainly modify the code of application and hardware abstraction layers to solve the problem.For the one-key recovery module, the hardware platform is LPC1114 developed by NXP,which is based on ARM Cortex-M0 and a low-cost 32-bit microcontroller. It is designed for 8/16-bit microcontroller applications and reduced code size compared to existing 8/16-bit architectures. Furthermore the code which is used for restoring system is stored in a special storage W25X16, and its advantage is low-power and very suitable for downloading code. The recovery process is the code is read from W25X16 and wrote in CC2530 by LPC1114. Then the one-key recovery is completed.After a lot of tests, the result show that the software and hadware described in this thesis meet our design requirements,significantly improving the life of the node. |
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