Design Of Wireless Communication Front-end Control System Based On IoT Application

Wireless communication technology is one of the key technologies of the Internet of things(IOT).Based on the research of wireless communication front-end control architecture and wireless communication protocol for IOT applications,this paper designs a wireless communication front-end control system which is suitable for low power IOT applications.System design compose of three aspects: 1.Design of frontend control interface of wireless communication;2.Design of embedded wireless communication system;3.Application layer software interface design.The main work and innovation of this paper are as follows:(1)The difference of wireless communication protocol can cause the problem of incompatibility of communication front end.Therefore,a highly applicable wireless communication front-end control interface is designed in this paper.This paper chooses the standard SPI(Serial Peripheral Interface)Bus protocol to design the data communication interface.By analyzing different wireless communication protocols,a data processing module that can customize data frame format is designed.In order to facilitate wireless communication front-end test and function expansion,a test module with data direct mode is designed.The control interface will have high power consumption when dealing with external trigger signals.This paper designs an external signal trigger method to reduce power consumption without affecting the performance.(2)Embedded wireless communication system is designed based on STM8L151 G chip.The design uses three different data transmission methods.By comparing the test results,the applicability of the three methods is analyzed.At the same time,the design of embedded wireless communication system includes standard SPI interface,UART interface and low power consumption mode.The system can meet the needs of most IOT applications,and provide a reference for the design of embedded communication system.(3)According to the application layer requirement of wireless communication front-end control system,the software interface based on host computer is designed.Two common methods of computer communication for ActiveX control and API function are implemented.An improved Multithreaded API method is designed to effectively solve the problems in common methods.At the same time,this paper designed a data transmission protocol for the communication process between PC and MCU.It is verified that all blocks of the wireless communication front-end control system designed in this paper perform as well as prediction and achieved the desired goal.The solutions given in this work can be easily applied to solve the problems of wireless communication system for IOT applications.