The Research And Simulation Of Asynchronous Communication Of Internet Of Things

With the development of the Internet of things, this technique has become one ofthe most popular technologies in the current society. In the Internet of things, when weuse the mode of synchronous data transmission, we need send the synchronous data toeach node. In the network, there are many nodes, and sensor nodes or control nodeshave a low utilization rate. In this case, if each node uses synchronization circuit willlead to increased costs and make the system complex. So the paper put forward aconcept. It will use the mode of asynchronous communication to simplify the node ofthe Internet of things.In the first, the concept of the Internet of things is introduced and its developmentat home and broad, and then some data transmission systems are introduced. Second,this paper introduced the composition of the Internet of things. The Internet of things isdivided into three layers. And the layer of network is used for data transmitting. It alsointroduces some kinds of data transmission technology of Internet of things, andanalyzes the advantages and disadvantages of asynchronous communication andsynchronous communication.In this paper, the design of asynchronous serial communication simulation isdivided into three modules: the transmitting module, the receiving module and thecontrol module. This paper describes the design ideas and running process of the threemodules. The transmitting module is responsible for sending. In this process, serialdata will be changed into parallel data. The start bit, stop bits and parity bit will beadded for each bit of data. The input data was changed into asynchronous serial data.The receiving module is responsible for receiving the data. The data coming from thetransmitting module will be read out by the receiving module. And the serial data willbe changed into parallel data and will be output by the receiving module. The controlmodule is mainly to control the transmitting module and the receiving module. In thesimulation of this part, the paper introduces the asynchronous serial data transmitprocess, reception, parity check process, state machine change process, and the signaldomain of the receiving module were discussed. Let us have a profound explanation ofthe principle of asynchronous serial communication. In the IOT asynchronous serial simulation, the design is a temperature acquisitionand control hardware system. The design is divided into four modules: DS18B20temperature acquisition module, digital tube display and control module, serialtransmission module, software key surface display module. The internal structure oftemperature acquisition chip DS18B20and simulation timing diagram and thestructure of MAX3232ESE will be introduced. The software and hardware design ofthe whole operation process will be given. This design uses FPGA as the control chip.The design is through the temperature sensor to collect temperature, and then transmitit through the serial communication. The data of temperature will be transmitted to thehost computer by the asynchronous serial mode. The temperature can real-time displayon the computer, and compared with the reference temperature. According to thetemperature difference, the system will do the right operation. The design is a practicalapplication of asynchronous communication in Internet of things. And it has thefunction of temperature acquisition and control.The paper about asynchronous communication of Internet of things is divided intotwo aspects of theory and practice to study. The data transmission process ofasynchronous communication is analyzed in detail. The actual application of theasynchronous serial communication mode is applied to the Internet of things. In thepaper about research and analysis of asynchronous communication in Internet of thingshas certain reference value for the data transmission.