The Design Of Wireless Data Transmission System Based On ZigBee

Employing the transmission system of the wireless data is an important way to gain the surrounding information,and it is an important technology to obtain a variety of data.The traditional system that transmit the data is complicated and the cost is relatively high.The wireless transmission system of this paper adopts the wireless sensor network based on ZigBee,which is low cost,no wiring is needed,and the network structure remain stable,and the network is not prone to paralysis,the most important thing is to achieve real-time monitoring.In the aspect of the hardware design,the RF chip of the 2.4GHz frequency band has been used on the node for realizing the wireless communication,TI’s CC2530 chip as the core of the node.The hardware design of data acquisition system has been achieved by adopting the main peripheral interface devices including the serial port,the liquid crystal display and the temperature humidity sensor(the temperature humidity sensor is the SHT11 type,of which the temperature collecting accuracy reachs ± 0.5 ℃).For software design,we deeply study the technical principle and the protocol structure of the ZigBee,as well the functions of the each layer,also transplant and modify the Z-Stack protocol stack,finally complet the programs for the networking about the coordinator and the theterminal node,and for the data collection.About the data processing,the monitoring software has been designed in this paper based on the interface design of MATLAB GUI created by GUIDE in MATLAB.The GUIDE is a rapid application development specially designed for graphical user interface,which friendly and easy to use,getting the temperature and humidity curves only via opening the serial port,the changes of the temperature and the humidity intuitively displayed.In this paper,the pattern combining the hardware and the software is adopted.The data of the temperature and the humidity through the wireless sensor network of the ZigBee are sent to the PC,of which the software monitors the curves of temperature and humidity in time.But the monitoring software real-time monitoring there is a delay,need to continue to improve,the last chapter introduces the working steps,the possible problems and the solutions,foreshadowing the subsequent works.