Design And.Implementation Of Agriculture Greenhouse Monitoring System Based On LoRa Technology

With the rapid development of agricultural modernization,agricultural greenhouse is also developing towards the direction of intelligent management.At present,most agricultural monitoring systems use WiFi,ZigBee and other short distance wireless technologies to realize the networking of sensor networks,but they have some problems in agricultural greenhouse monitoring with large area and complex environment.In this paper,compared with other communication technologies and combined with the merits of LoRa technology and the development status of agricultural greenhouse,an agricultural greenhouse monitoring system based on LoRa technology was designed.The main research work in this thesis can be summarized is as follows:1.The development status of agricultural greenhouse monitoring technology at home and abroad was studied.Some communication technologies,such as WiFi,Zigbee,and LoRa,etc,were compared and analyzed.Combined the characteristics and merits of LoRa technology,and a way was proposed that LoRa technology is applied for the design of the agricultural greenhouse monitoring system.2.According to the actual application requirements of hardware,The hardware circuit design of data acquisition node and data sink node was designed.The hardware circuit design of the acquisition node comprises a power management module,sensor interface circuit,LoRa communication module and MCU minimum system module;The hardware circuit design of the sink node comprises a power management module,LoRa communication module,LCD module,GPRS communication module and MCU system module.The acquisition node collects the environmental parameters by various sensors and upload environmental parameters to the sink node by LoRa,it can also have a response to instructions emitted from the sink nodes.The sink node mainly realizes data transmission between the acquisition node and the remote server,including the function of the monitoring and management of the system.3.The software design of this system is based on the embedded real-time operating system uC/OS-?.The specific process of transplantation of uC/OS-? is presented in the software design and the different task modules are divided based on application requirements and the priority.According to the relevance between the tasks,the underlying driver design of each module is completed.4.The actual testing of the functional modules in the system is carried out.The results of testing indicates that node networking,communication distance,packet loss rate and power consumption of the monitoring system,etc,meet the requirements.The system achieves the purpose of expected design.In this paper,the design of agricultural greenhouse monitoring system based on LoRa technology has wide coverage,low power consumption and flexible node setting.It has a good application prospect in the agricultural monitoring.