Design And Implementation Of Wireless Sensor Network Based On Wi-Fi

With the development of society,wireless communication has become an essential part of people’s lives,the traditional cable transmission has exposed the disadvantages of high cost,maintenance of erection difficulty and poor mobility.Wireless communication broke through the time and space conditions and get rid of the shackles of the line,the construction is more easy and the movement is more flexible,coupled with the continuous updating and iteration of wireless communication technology,the application domain is more and more widely and the technology is more and more mature,which greatly improved the traditional communication mode.The wireless sensor network designed in this paper takes CC3200 as a wireless forwarding module,with sensor signal acquisition module,wireless controller,wireless hotspot(AP)and upper computer to realize sensor signal collecting and editing and data transmission.Based on the background of the research,this paper introduces the research status quo and the current wireless technology at home and abroad,and then introduces Wi-Fi as a main field of wireless communication,related indicators and wireless networking technology.The main contents of this paper are wireless networking,hardware circuit design and software design of the module and upper computer.The hardware part mainly includes the selection and layout of component related collecting and editing module and wireless transmission module.The software part mainly includes the compilation of the wireless forwarding module program and the module control and data receiving software used by the upper computer.The main development part of the wireless transmission module is the compilation of UART interrupt program,the wireless transmission of signal data based on TCP/IP protocol,and the reception and judgment of the upper computer’s sending commands.The upper computer program is written in C# language under.N ET platform,which mainly uses Socket programming and WinForm programming,and realizes the control of the wireless forwarding module and data receiving and saving.Then the system is tested in part and overall,and problems which occur are analyzed and solved.Finally,the whole work is summarized,and the next step is put forward.The system test shows that the wireless sensor acquisition network designed in this paper can meet the needs of multi terminal simultaneous transmission.The transmission accuracy is benefited from the TCP/IP protocol,which can guarantee high accuracy and long communication distance to meet the actual project needs.