Design Of Distributed Greenhouse Data Acquisition System Based On WSN

With the rapid development of science and technology,the development of any industry,including agriculture,will inevitably be challenged by the new technology.In recent years,the greenhouse planting technolo gy is widely used in the world,and the promotion of automation equipment in the traditional greenhouse received greatly limits due to the laying of a large number of long lines.As a new generation of sensor networks,wireless sensor networks based on Zigbee can solve this problem well.For most plants,the temperature and humidity in the air plays the most important role in the growth of crops,so this paper focuses on the temperature and humidity in the air as the monitoring object.This paper uses TI's CC2530 as the central processing unit,which is based on the standard specification of IEEE 802.15.4,the CPU can build a strong network node with very low cost and low power consumption.First of all,we need to achieve the basic functions of the system to make a general introduction,and then respectively,the specific realization of each function module were described in detail,and last is the analysis of how the various modules work together to complete the funct ion of the whole system.At the same time,we also improve the routing algorithm of sensor networks based on greenhouse environment.In this paper,we use a coordinator and a number of terminal nodes to form a Zigbee star network structure,the terminal node is connected to the DHT11 temperature and humidity sensors for the collection of temperature and humidity data in the air,and then the sensor terminal sends the achieved greenhouse temperature and humidity data to the coordinator at a certain frequency,after that,the coordinator sends the received data from each terminal to the PC through the serial port,and PC displays the collected temperature and humidity data.At the same time,we establish WiFi hot spots on the PC,and the mobile terminal read the data from the PC after connecting to the PC.Furthermore,we can also set the temperature and humidity threshold to achieve unmanned,fully automated greenhouse management.