The Design And Implementation Of Internet Of Things Gateway Based On Cortex-A9

Nowadays,IOT is playing a important role in the new generation of infor mation technology and will greatly change people's way of life with great mar ket potential.IOT through the perception of identification and control to achiev e the connection between things,to further achieve information sharing.Interne t technology in the depth of development will promote the type of sensor equi pment and the increase the number of applications.The development of IOT is closed to the corresponding gateway equipment,Gateway as a link device bet ween the sensing layer and the transport layer has a wide range of access cap abilities and protocol conversion capabilities.In a word,gateway is an essential component of the IOT system.The traditional gateway can't meet the requirements of IOT gateway,the d evelopment of embedded technology provides a new impetus for the developme nt of IOT.Now embedded technology and equipment have been applied to our lives and will play an important role in the development of the IOT.This article is based on the actual needs of the new generation IOT gatew ay.Analysis of the Internet of Things architecture and the status of IOT gatewa y in the entire IOT system.Through the research of embedded technology,wir eless sensor network technology,embedded WEB server technology,GSM mobi le communication technology put forward a new program.The program can ac hieve the accession of different types of equipment access.First of all,the sys tem uses ARM processor architecture as the system core control platform and analyze the hardware composition of the system and the software architecture.Designed the peripheral basic circuit module around the core processor,includi ng ethernet interface module,serial port module,USB interface module and S D card interface module and so on.The overall hardware platform of the gate way system consists of a core processor and a peripheral circuit module.Base d on the platform,through the USB interface module and RS232 serial port m odule to communicate with external devices and to achieve the acquisition of v ideo signals and wireless signals.External devices are mainly USB camera mo dule,ZigBee wireless network module and GSM SMS module.The system explains in detail the working principle of these three external devices and the har dware circuit.Secondly,the subject design uses the Linux operating system and introduc ed the implementation process of Linux system and the configuration of file se rver.Through the embedded WEB server technology achieved a good human-c omputer interaction;the working principle of BOA server is analyzed in detail;in order to achieve the function of video signal acquisition,analysis the fram e of V4L2.In order to realize the SMS alarm function through GSM mobile c ommunication technology,this paper analyzes the working mode and working p rinciple of SMS module in detail.The system can achieve the alarm In the ca se of abnormal data.System application design use of multi-process communic ation mechanism and description Command data format.When the client sends a request,the server responds to the request.In the system programming shou ld consider the communication mechanism between processes in order to avoid problems in response to customer requests.Finally,we test the functions in system environment.The results show tha t the system function is stable.Users can get video and environmental informa tion.Users can receive abnormal alarm information in the case of abnormal da ta.The system of the gateway system is stable and With the basic functions o f the gateway.At the same time there is a good human-computer interaction i nterface for the user to manage devices conveniently.