Research On Farmland Small Weather Station System Based On LPWAN

China is a big agricultural country.Agriculture is the foundation of our country and the foundation of a strong country.Grain is the fundamental element of people’s survival.The development of agriculture is also the foundation of a country’s development.It indirectly determines the development of other industries.In the process of agricultural planting,the output of crops is the most concerned issue for farmers.However,the uncertainty of the environment and the variability of the weather have greatly affected the planting and output of crops.Therefore,this paper designs a set of main weather stations.The small farmland weather station system composed of two sub-weather stations can better monitor the field climate and increase crop yields through scientific means such as obtaining meteorological data in real time.The farmland climate is unstable and volatile,and the previous manual monitoring and single meteorological data monitoring can no longer meet the needs of modern agriculture.Aiming at the problems of high cost,high power consumption and difficult management of agricultural meteorological data collection,this paper designs a small farmland weather station system based on Low-Power Wide-Area Network(LPWAN)technology.The system consists of designing a main weather station and two sub-weather stations,including STM32 single-chip microcomputer,sensors that monitor five basic elements of farmland including environmental temperature and humidity,light intensity,wind speed,and soil temperature,Lo Ra module,NB-IoT module,Solar power supply module and cloud platform module;the meteorological data of the sub-weather station is transmitted to the main weather station through the LoRa networking,and the main weather station summarizes the system data and uploads it to the cloud platform through the NB-Io T module to realize remote monitoring.The experimental results show that this solution can accurately upload farmland weather data to the cloud platform,and can realize the alarm function,and the system is powered by solar and lithium batteries,and can work continuously outdoors.The main work of this paper is as follows(1)Broad monitoring range.The main weather station and sub weather stations of this system use LoRa technology to achieve long-distance transmission between weather stations.The main weather station can be connected to the cloud platform in remote areas through the NB-IoT module,so the system can realize large-scale farmland weather monitoring in remote areas;(2)Stable and uninterrupted power supply plan.This system uses a power supply system that combines solar energy and lithium batteries.This uninterrupted intelligent power supply includes solar panels,lithium batteries and solar lithium battery controllers,which not only continuously and stably power the system,but also has the ability to resist natural disasters.To ensure the continuous operation of the system;(3)Cloud platform remote monitoring and alarm.By registering the cloud platform account to set the relevant agreement,it can complete the data interaction with the system,so as to realize the weather monitoring.The cloud platform has functions such as data collection,data analysis,intelligent alarms and cloud storage,among which alarm notifications can prompt farmers with weather information through We Chat,SMS,etc.;(4)Low power consumption function.LoRa and NB-IoT technologies are used in the design,and through the design of hardware and software,the system alternately runs between working and sleeping states,achieving the effect of long-distance monitoring and low-power operation.