Measurement And Control Method Of Internet Of Things Nodes Based On Pe Packet Data Communication Protocol

Combined with the serious problems of indoor air pollution in China,and Refer to the traditional fresh air control system,Based on the study of the technology of the Internet of things,this paper combines J2EE(Java2 Platform Enterprise Edition)technology,sensor detection technology and WiFi network communication technology to realize remote monitoring and online data sharing.A node monitoring and control method based on PE packet data communication protocol is presented.The measurement and control system is mainly composed of two modules,one is the Internet node for monitoring and control,the other is the network processing control platform.The Internet node is composed of sensors,singlechip and WiFi module.The main task of sensors is to collectting information and process it.The microcontroller will takes these information and packaging,then controls the WiFi module to the network platform.after that the microcontroller will controls the WiFi module to transmitted that data to the network platform.This paper briefly introduces the hardware circuit design,mainly introduces the custom PE packet network protocol and the software design of the network platform system.Each of the hardware circuit sensor modules can collect and process data by themselves,and then could directly access to the MCU,The WiFi module directly connects to the MCU after burning the AT firmware.The microcontroller writes a program to wrap the incoming data of the sensor and send it to the network platform through WiFi module and circulate.The network platform is mainly divided into three parts,interface design,business logic and database,because of time and convenience,Interface design does not use the best front-end development technology,just adopted basic Java program to designed a simple interface pages.because the Microsoft interface very good,and the data is not much,so the database was chose the SQL Server database to storage data.Business logic and database are developed by frameworks to improve development efficiency and reduce coupling degree,and providing convenience for subsequent development.For the readability and further scalability of the program,a communication protocol for communication between network nodes and network platform is defined.Based on this protocol,the interaction of network nodes and network platform is clearer.Nomatter the programming of the MCU in the slave computer or the control mode of the network platform,there is a reference,if later,the network platform can be used as a reference.if Further development is needed.Referring to this protocol,we can quickly grasp the system's principle and make it easy to modify and upgrade.The network platform of this measurement and control system can run on its own.It will automatically pull the data in the database to display on the panel.The network nodes will collect data to the database.Only when the network nodes are connected to the network platform,the network platform can send out the control commands,and the feasibility of the indoor intelligent new wind system is verified experimentally.At the same time,the fresh air system will be integrated into the Internet of things,which is the future trend of the fresh air system.