Research And Implementation Of ZigBee Based Data Acquisition System Of Greenhouse Environment

With the rapid development of Internet of things technology,modern information agriculture has also been arapid developmen ? Compared with traditional planting agriculture, Modern information agriculture not only saves a lot of manpower and material resources,And agricultural production has been greatly improved.China is one of the most populous country in the world ? People have a great demand for grain Therefore, the development of agricultural informatization is imperative?Wireless sensor networks used in Intelligent Agriculture,Such as greenhouse?You can always monitor the growth status of crops and make the corresponding measures,he crop growth environment to maintain the best condition,Greatly improve the agricultural production?So the study of the agricultural information has great significance?After half a year of in-depth study of the infrared, Bluetooth, Wi Fi, ZigBee four kinds of wireless communication technology,Especially for the IEEE 802.15.4/ZigBee protocol stack to do in-depth research.And in the study of these four wireless communication technology based on the development of the projec.Through the project,four different kinds of wireless communication technology are compared,We can see that ZigBee wireless sensor network in data transmission, low power consumption, low transmission rate, data security in the transmission process,The utility model has the advantages of the purchase of the required hardware cost is cheaper. Therefore, choose the ZigBee wireless sensor technology to complete the project.In this paper, using temperature and humidity sensor DHT22 and light sensor,CC2530 chip and other hardware equipment, data acquisition system was established to simulate the intelligent agricultural greenhouses during normal operation.Mainly on the IEEE802.15.4 protocol and ZigBee network are analyzed and expounded,Especially for the point to point wireless communication and wireless communication point to multipoint process,code writing and debugging are analyzed in detail.The terminal nodes and coordinator nodes hardware configuration.Communication process and the key code of the preparation of the design, the successful implementation of the protocol stack.Keytest of terminal node data acquisition and transmission, and lay the foundation for future expansion, transplantation and design in the practical work of network application and software.