Based On The Cc1110 Wireless Self-organizing Sensor Network System

In recent years, wireless sensor networking technology becomes one of the hot spots of Internet sector research. Here are a number of species technologies used in wireless sensor network (such as:Bluetooth, RF and ultra-bandwidth wireless communications, etc.) to promote the development of wireless sensor networks. However, it does not require high bandwidth and long distance in the fields of intelligent home, medical care, and industrial monitoring applications. But only it requires low-cost, low-power local wireless communications. In order to meet the requirements of these applications, TI introduced the CMOS chip of System on Chip (SoC) recently--CC1110 chip, which works at 433MHz,868/915MHz ISM. In order to achieve wireless network communication, TI Company designs a proprietary low-power RF protocol specializing in simple small-scale RF network--network protocol of SimpliciTI. This protocol can simplify implementation, reduce the MCU's resource consumption, and reduce the cost of RF network systems. It is an excellent supplement for ZigBee which is adapt to mesh routing and the standard configuration for a large network.I have done some works which are introduced in this paper:1. CC1110 wireless module is designed as the core module. And self-organizing wireless sensor network system based on the CC1110 is designed. The system includes the control center and the terminal child nodes. Terminal child nodes include the clock, temperature collection and storage modules. And this paper introduced the hardware design of clock module of terminal child nodes and sensor acquisition module. The control center of the system connects to the computer via USB, and finishes system time synchronization, storage information operation via PC software,, while the corresponding information is displayed by PC software. The terminal child node, which is responsible for collecting information, finishes data acquisition mainly through the temperature sensors, transfers the data to the control center after a network connection has been established.2. Network protocol of SimpliciTI for small RF networks is used. And a simple master-slave-type star network has been set up based on the network protocol stack which is provided by the protocol. Wireless self-organizing network is realized by software.I have developed applications of automatically joining the network of a terminal child nodes, time synchronization, reading information and other in the user application layer.3. The whole system has been tested, such as networking, point to point communication and so on. The corresponding information can be displayed by PC software. The design reached the expected requirements.