Research On LED Intelligent Lighting System Based On Internet Of Things

With the widespread application of Internet of Things technology,there is an urgent need for the security of storage and transmission of network data.As an application of the Internet of Things,smart lighting system is becoming more and more important in data storage and communication security.Blockchain technology will be blockchain technology because of its high security in data storage and network communication.Application and IoT lighting is an effective way to solve network security problems.This paper studies a lighting IoT control system based on blockchain technology,which can guarantee the network security of IoT lighting system,and improve the data processing by making lightweight IoT devices independent of the blockchain.Real-time,while using smart contracts to achieve intelligent control of lighting.The main work of this dissertation is as follows:(1)According to the functional requirements of IoT lighting,the system architecture of IoT lighting is proposed.Based on the architecture,a scalable management mechanism based on the Ethereum network platform is proposed.The control mechanism is based on the Ethereum blockchain.The platform realizes intelligent control of lighting,security management of equipment,access control of data,and secure storage of data information by studying the method of writing control strategy,device management,and access control into smart contracts.(2)In view of the difficulty of accessing IoT for lightweight devices,this paper designs IoT devices that use NB_IoT technology and rely on CoAP protocol to access the network.The device combines three communication modes of ZigBee,WiFi and NB_IoT to realize the different architecture networking of the lighting system.The embedded microprocessor STM32F107 is the core,and the NB_IoT technology is used for network connection to realize remote control,which is realized by ZigBee.The ad hoc network of the lower-level device uses WiFi to implement local control.(3)The LED driver controller is designed.The driver controller uses the embedded microprocessor STM32F103 as the core,and uses ZigBee for wireless communication to realize the self-organizing network with the superior device,which has the functions of switching,dimming and electric power detection.(4)The application software was developed using Web technology.The application software can interact with the Internet of Things platform through the API interface to obtain data information,and has the ability of data processing and analysis,and can perform status monitoring and fault alarm on the lighting system.(5)Through the unit test and system test,the function and performance test of the system are carried out.The results show that the correct execution rate of the control command,the accuracy of the measurement data and the delay of the response command have all reached the expected aims.