ZigBee-based Communications Room Temperature Monitoring System

Fire event in communication equipment rooms, as the highest risk factor of safety accident, can possibly cause a huge threat to the running of the communication network, so that it is of vital significance to grasp, accurately and in real-time, the temperature status in the communications room so as to control the equipment for safety management of such engine rooms. In order to constitute such a monitoring system, this thesis has chosen a ZigBee wireless sensor network solution basing on a lot of comparison for various possible methods and schemes.The birth of the ZigBee technology has filled the blank of wireless sensor networks in the aspects of low rate, close distance and great capacity, providing opportunities for the further development of the wireless network.Aiming at monitoring room environment, this thesis researches in depth on the connection of several kinds of sensor networks, and has designed and implemented a wireless sensor network based on ZigBee technology devices, including gateways, routing and terminals.The terminal is mainly composed of such three parts as sensor, processor and wireless communications, where the sensor is responsible for converting the temperature information of the communication equipment in a room into a digital signal, the processor obtains the temperature information from the sensors at single bus operation mode. The processor also processes and storages the information with low-power consumption. The wireless communication part is responsible for transmitting the temperature data. The gateway is responsible for the management of the whole network as well as data collecting, which is mainly composed of a processor module and some commonly used data interfaces. The routing is used to realize capacity expansion for wireless data relay network.The core part of system is realized with some CC2530F256wireless RF chips, where some peripheral circuits are necessary, so as to facilitate future maintenance and expansion of the hardware system. Software portion is in accordance with the ZigBee protocol stack, where each module of the software program is written in the IAR EW development environment. The software has been debugged and solidified. The system has been passed FBI test and realized networking run.The preliminary test results of simulating the actual environment show that the system can quickly network, accurately collect data; its performance has reached the expected requirements.Compared with other schemes, the system designed in the thesis has obvious advantages, such as convenient in wiring, easy to install, simple to maintain; moreover, it has good scalability. It provides a new idea for room temperature monitoring.