Research And Implementation Of Wireless Video Transmission Based On WIFI

With the wide application of WIFI technology,electronic devices combined with WIFI technology are becoming more and more popular.At present,scientists have developed STM32 microprocessor chip with Cortex-M4 core,which is used as the core of this design to achieve wireless video transmission.This design has the characteristics of high configuration,low cost,light weight,strong battery life and so on.Through WIFI technology,the video is wirelessly transmitted to the terminal at a certain frame rate.Compared with wired transmission,it has better mobility and saves the trouble of wiring.Hardware part: The hardware part of the design is mainly composed of camera module,wireless transmission module and main control chip,which is divided according to their respective functions.The camera module is OV2640 image sensor,the wireless transmission module is Marvell88W8782,and the main control chip is STM32F407.The main control chip core of this design is Cortes-M4,which can control the camera module and the wireless transmission module,and then transmit the video to the terminal to achieve the purpose of monitoring.Software part: This part is mainly on the hardware platform to develop programs to achieve functions.We can flexibly select and transplant the Lw IP protocol stack and Marvell88W8782 driver program to the STM32 microprocessor according to the actual situation,and transplant these programs to the STM32 microprocessor,and at the same time transform the design of the underlying driver and the interface of the application layer.So that the NFC library function written by the host computer program and Socket based on the client can run well.In the process of transplantation of WIFI driver,we carefully analyzed the WIFI principle concept and the operation mode of the WIFI driver standard model,so as to achieve the purpose of accurate and rapid communication.The design scheme of hardware and software in this paper has good test results.The results show that the image collection function is not affected by the strength of WIFI,and the image can be collected and output stably in each WIFI environment.The system has the advantages of low hardware cost,light weight,high cost performance and simple connection mode,which greatly improves the feasibility of the design.At the same time,the problems that need to be solved and improved in the future are also proposed.