Home Intelligent Monitoring System Based On Nb IOT Technology

The traditional smart home devices based on the Internet of things generally interact with the gateway through ZigBee or Bluetooth or some other 433Mhz communication mode,and then forward the device information through the gateway.In most cases,the gateway adopts the communication mode of Wi-Fi,GSM,3G or 4G to transmit information to the network.However,in this way,not only the communication between the device and the gateway,but also the network state of the gateway itself needs to be considered.Moreover,both the device and the gateway need to be kept within a certain distance,so long-distance transmission cannot be realized.Aiming at the problems of poor signal,high power consumption,narrow coverage and high cost in the traditional method,this paper designs a home intelligent monitoring system based on NB-IOT.The system is a way of monitoring combining the monitoring equipment based on NB-IOT technology with cloud platform server.The advantages of this approach are:portable equipment(equipment out of the gateway,mobile),broad cover(based on operator base station),low power consumption(NB-IOT module USES eDRX power-saving technology,reduce the unnecessary receiving),low cost(NB-IOT module very cheap).By studying the NB-IOT transmission mechanism and combining sensor technology and Internet technology,users can view the information of home NB-IOT monitoring equipment(such as temperature and humidity data of the equipment,as well as operating data such as the power of the equipment itself).The system consists of terminal monitoring equipment,linuxC data server and cloud platform server.The terminal equipment is responsible for data acquisition,data processing packaging,and NB-IOT network transmission.The terminal will collect data from SHT31 temperature and humidity sensors and other sensors,package the data inspection and send it to the linuxC data server through NB-IOT network.The linuxC data server will make a temporary storage and forward,and forward the data to the Java background server.The Java background server receives the data from the LinuxC data server,unpacks and saves the successfully unpacked data to the MySQL database.At the same time,Java receives the request from the front-end interface,executes the request from the front-end,and returns a result to the front-end.The test results show that the system can accurately collect and process data,and can maintain good communication with the server.Nb-iot terminal monitoring equipment meets the design requirements of low power consumption,in sleep time,whose current is less than 10 ?A,after waking-up,the sending current is about 26 Ma,and the receiving current is between 80 and 130 Ma.The system has research significance for the development of intelligent home devices under the condition of Internet of things.