Research And Implementation Of Soil Multi-parameter Data Colletion And Transmission System Based On IOT

With the rapid development of technology in Internet of Things,intelligent agriculture will be development trend of modern agriculture in the future.Using technology of Internet of things in agricultural production can not only change the management mode of agricultural production,enhance the efficiency of agricultural production,but also be conducive to the protection of cultivated land.With the background of the scientific research project of the Agricultural Internet of things approved by the Xi'an Municipal Science and Technology Bureau,the system of multi parameter collection and transmission of soil based on the Internet of things is designed and realized.The system can perform real-time collecting and transmitting of agricultural soil environment parameters,which plays an important role in improving the agricultural production efficiency and management of ordinary farmers and general farms.The system is consisted of the hardware which include micro controller,LoRa wireless communication technology,ZigBee technology and MS 10 soil moisture sensor,YJ-SPH100 soil pH sensor,soil nutrient measuring instrument and relative software.The author designed and constructed the system for the large-scale farms and ordinary farmers.The author first studies the network transmission of large-scale farm collection point data and introduces a new low-power transmission technology of the Internet of Things-LoRa.The paper focuses on researching the transmission performance of LoRa in the wide area.then relative experiments has been carried out at the indoor and field outdoor about the effection of LoRa networks transmission.On the basis of theoretical research and networking experiment analysis,a LoRa network transmission scheme for farms was designed.Subsequently,the author uses the microcontroller and the soil sensor to collect data at the terminal node in the farm.The LoRa module automaticly composes a network for data transmission.The gateway node receives the data and uploads the data to the soil multi-parameter monitoring and analysis system server through WIFI.As the high supplement of project,the author designs and implements a professional APP,which can complete the role of auxiliary information transmission in the process of data acquisition and transmission?In other hand,due to the small range of cultivated land for ordinary farmers,author adopts the data transmission method of ZigBee wireless Ad Hoc networks.The acquisition part of the front end still uses the combination of microcontroller and sensors;the monitoring point data is transmitted by the ZigBee network;the gateway node receives the data of the sink node and transfers the monitoring data to the Android mobile intelligent terminal while the Android mobile intelligent terminal is responsible for collecting data caching and preprocessing,and the professional APP is developed to completes the data of soil nutrient formula and other auxiliary parameters,combining the sensor data package through the TCP/IP protocol to send the soil multi-parameter monitoring and analysis system server.The server generates the multi parameter soil formula scientific fertilizer application by the expert decision system and sends it to the Android terminal to guide the farmers to carry out precise fertilization.The author carries out functional tests and transmission performance tests on the two types of acquisition and transmission systems in the outdoors.The test results show that the two sets of acquisition and transmission systems were able to complete the functional requirements better,and also meet the requirements of the project.