The Research On Application Of Lora In Intelligent Agriculture Transport Layer

At the end of 2008,IBM made a "wisdom of the earth" strategy to the United States,the Internet of things began quickly in many countries caused a high degree of concern.China attaches great importance to the development of Internet of Things technology,as it is our national strategic emerging industries is an important component.Agricultural networking refers to the information through the agricultural information sensing equipment,the agricultural system in some of the information and the Internet link to carry out information exchange.Due to the lack of analysis of the hierarchical structure of the whole agricultural networking,leading to the emergence of fragmentation,verticalization and isomerization of agricultural networking.The object network model is generally divided into perceptual layer,access layer,network layer,data layer and application layer.Each layer corresponds to a different application protocol.Lora in the Internet of Things applications in the access layer,compared to 2G,3G or WIFI,Zig Bee access technology,there are obvious advantages.In this paper,according to the advantages of Lora,in its wisdom in agriculture to make relevant technical research.The specific research contents are as follows:To study the ability of Lora spread spectrum technology to resist interference and endurance in complex agricultural environment.Communication stability in different environments.The different environmental models were established,and the numerical results and experimental results were compared and analyzed.It is concluded that Lora technology plays a large advantage in the access layer of wisdom agriculture,and then it is reliable theoretical support for Lora's application in intelligent agriculture.STM8L processor producted by ST Company is used as the core processor for access layer communication,and Semtech's SX1278 is a data transmission module based on ultra long-distance low-power communication chips up to 1GHz.Used to carry out temperature,humidity,wind speed,soil moisture and other information collection,and can light,deworm lamp water pump for remote control.The Lora Wan protocol is used as a gateway to the communication protocol stack,which greatly enhances the scalability and compatibility of products.STM32 processor is used as the core of the hardware gateway processor,using the hardware protocol stack W5500 as a TCP / IP communication chip.STM32 is a very good ARM7 processor based on the CORTEX-M3 core.Using SX1278 as a wireless communication module and other modules for data interaction.Extended serial communication can be directly connected to the host computer communication.