Research And Implementation Of Image Transmission And Networking Based On Zigbee

With the rapid development of wireless network technology,a variety of wireless communication standards emerged.In wireless communication technology,ZigBee technology is widely used in smart homes,remote monitoring,medical and health fields because of its low power consumption,low cost,large network capacity,ad hoc network,and other characteristics.The main characteristics of Wi-Fi technology are high transmission rate and direct networking.Wi-Fi technology is widely used in our daily life.Based on the characteristics of these two technologies,the research and development of the thesis are as follows:1.The device type in ZigBee network and the topology of ZigBee network are expounded.And the specifications and functions of each layer of ZigBee protocol are expounded,which includes modulation technology and demodulation technology of physical layer,physical frame format,MAC frame format,and network layer frame format.2.Collection and display of image data.The thesis uses CC2530 as the wireless chip of ZigBee node.The thesis uses OV7670 image sensor with FIFO to collect image information.The upper computer is developed by Visual C++ 6.0,which is used to display the captured images.The thesis first introduces the CC2530 chip.Then the functional modules and the control method of the OV7670 image sensor are expounded.Then the reading method of image data and the format of the captured image are expounded.At last,the design of upper computer is expounded.The thesis uses serial camera control bus to control OV7670 image sensor output image data of the QVGA,RGB565 format.Then the image data is transmitted to the upper computer through the serial port on the CC2530 single chip microcomputer.3.The working process of ZigBee protocol stack and the networking process of ZigBee nodes are expounded.The ZigBee terminal node sends the collected image data to the coordinator through the ZigBee network.The coordinator sends the image data to the upper computer through the serial port.In addition,the ZigBee protocol stack is developed on the GNU Radio platform,making it a ZigBee-WiFi gateway.The terminal node transmits the collected temperature and humidity data to the GNU Radio platform through the ZigBee network.The platform converts ZigBee data frames to WiFi data frames and uses the WiFi protocol to send temperature and humidity data to another GNU Radio platform for display.In this way,the network fusion of ZigBee network and WiFi network is realized preliminarily.