| Internet of things(IOT)technology is widely used in many fields such as intelligent industry,medical treatment,transportation,home and metrology to realize intelligent identification,location,tracking,monitoring and management.Based on the research background of intelligent measurement and monitoring,this paper combines theory with practice to design a wireless sensor network for measuring and detecting environmental temperature and humidity.In this paper,we propose a technical scheme using ZigBee technology as the communication mode of the sensor layer wireless sensor network.ZigBee is one of the three emerging wireless sensor technologies,and it is simple and flexible.ZigBee is a low power WLAN protocol based on 802.15.4 approved by IEEE standard.ZigBee is characterized by short distance,self-organizing network,low complexity,low data rate and low power consumption,which is in line with the real-time monitoring of the field environment.According to the data types that need to be collected,the corresponding sensors are selected to construct the sensing system.CC2530 chip is chosen as the main control chip,and the circuits of the bottom module and the radio frequency module are designed.Through the compiler of ZigBee protocol stack,the wireless sensor network with multi-hop Mesh network topology structure with self-organizing network function is built.The application of integrated development environment and C language programming are used to debug and simulate the program of radio frequency module.The function of collecting and forwarding data in wireless sensor network is realized,and the data is transferred through serial port.The function of transmitting to the computer.The communication test and analysis of the design structure are carried out.In the actual measurement laboratory,test points were set up,and the accuracy and stability of the measurement of environmental temperature and humidity were tested systematically. |
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