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1、<p>  Research on the Application of IOT in smart garden project</p><p>  Abstract: For artificial irrigation in excess or deficiency, not timely and other shortcomings, the paper expounds the applicati

2、on in agricultural and landscape irrigation system based on the wireless sensor network and single chip computer; at the same time the paper designed system architecture of automatic irrigation system based on wireless s

3、ensor network. The hardware of the system adopts CC2430 single chip microcomputer as control core, by the real-time acquisition and processing of data i</p><p>  Keywords: Wireless sensor network; MCU;GPRS;

4、automatic sprinkler </p><p>  0 Introductions </p><p>  The low utilization ratio of the garden water resources and the shortage and waste of water resources coexist in china [1]. It is the main

5、 problem facing the development of gardens. The soil moisture in certain rate guarantee crops survival and soil moisture of excessive rate will cause the garden crop root rot. The fundamental way to solve the above probl

6、ems is the development of rational irrigation; improve the utilization of water resources in order to achieve the best economic and ecological</p><p>  1)At present, irrigation control system mainly use wire

7、d mode, adopting field bus and serial bus technology, not only need the wiring high cost and not easy to place, and the system installation and maintenance costs are high; </p><p>  2) The control algorithm

8、for the automatic sprinkler and drip irrigation garden control system most simple, that can not timely appropriate amount water according to the temperature and humidity of soil and plant water needs, so, it leads to the

9、 waste of water resources, and may cause the death of plants because of insufficient water or water. </p><p>  Aiming at the existing disadvantages of artificial irrigation, people gradually began to explore

10、 the irrigation automation journey; garden soil moisture information is one of the research focuses. </p><p>  Remote sensing humidity for garden soil is continuous, multi point, quickly and accurately colle

11、cting soil moisture values, and provides a scientific basis management for prevent drought. The system takes MCU and wireless sensor network as the core, design an automatic sprinkling system based on water-saving landsc

12、ape soil humidity information, the system has unattended, control precision, stable work, and has the advantages of saving labor and saving water resource. Therefore, this paper design</p><p>  The system tr

13、ansmits data through wireless sensor network information, microcontroller as the core to control the irrigation process. With humidity, rainfall, flows sensor to detect the humidity of the soil, the weather, rain water f

14、low velocity information, then send information to the microcontroller through the transmission of wireless sensor network. MCU control AC relay, relay on the solenoid valve open, high pressure water will spray automatic

15、ally through the nozzle. In order to meet the s</p><p>  Fig.1 The structure of the system control </p><p>  2 Design of sensor node </p><p>  The hardware design of each sub node i

16、s as shown in Fig. 2 , it is compose of small wireless chip CC2430 with low power consumption, temperature, humidity, electromagnetic valve. The basic work flow of this system mainly includes power on initialization, dat

17、a acquisition, power supply module and data receiving and sending etc.. When the system power on and start the procedure to configure the ports, the basic work flow as shown in figure 3. </p><p>  Selection

18、of the temperature and humidity sensor and parameters, the system uses TDR-3A. </p><p>  Soil temperature and humidity sensor, the sensor can also measure the temperature and humidity, with proper sealing, e

19、nvironment landscape soil waterproof, precision characteristics, is an ideal instrument for measuring soil temperature and humidity. Humidity measurement range is 0 ~ 100% (m3/m3). Precision is 0 ~ 50% range: ± 2%;

20、temperature range: -40 ~ 80 ℃, precision: ± 0.2 ℃; Output current is 4 ~ 20mA current loop. </p><p>  Fig.2 Design of sensor node </p><p>  Fig.3 the flow chart of sensor node </p>&

21、lt;p>  3 The hardware design of the gateway </p><p>  The hardware design of the gateway is as shown in figure 4. The hardware of the system adopts modular design, storage and processing module based on A

22、RM9 processor, the other part lonely design functions of different functional modules, and which divided into data aggregation and network access module, on this basis, with the ZigBee communication module, WiFi communic

23、ation module can adapt to the mobile information collection. If in order to enhance the real-time information whenever and whereve</p><p>  3.1 The software structure of the gateway </p><p>  Th

24、e software structure of the gateway is as shown in figure 5. Because access to support a variety of ways, especially the WiFi and ZigBee network. Therefore the gateway need to rely on embedded operating system as the sup

25、port, the protocol has been driven and implemented; database software is another aspect to consider, for the storage of the data information, database accession will simplify its management operation, improve the efficie

26、ncy of the development, the logarithm according to extende</p><p>  Fig.5 Software structure of gateway module </p><p>  3.2 Intelligent mobile terminal </p><p>  The Android mobile

27、 phone system has occupied most of the mobile phone market, so the intelligent mobile terminal using Android system mobile phone or handheld devices. Mobile terminal software architecture is shown in figure 6. </p>

28、<p>  Fig.6 Software structure of mobile terminal </p><p>  4 Software design and implementation of gateway module </p><p>  Internet gateway has access to extensive,as the ZigBee network

29、 communication and other network interface in information acquisition system, it is the important composition part of communication system. It needs information collection to provide support for the identity authenticati

30、on, message view,, and it should be delivered a message, uniform complete protocol conversion and data format, and the ZigBee network, Wi-Fi, serial port and TCP/IP protocol effectively integrated, unified messaging, s&l

31、t;/p><p>  4.1 DM9000A </p><p>  As shown in Figure 7 flow of DM9000A driver, it is divided into two parts as main program and the interrupt program. The main program is responsible for the initial

32、ization of DM9000A and the detection card, card access parameters. Interrupt service program is responsible for identifying the interrupt source and complete the relevant operation to process queries. Specific procedures

33、 are as described in Fig. 7 (a) and (b) shown. </p><p>  4.2 Driver development of 3G LC6311 communication module </p><p>  Manager for WindowsCE equipment complete the driver loading, unloading

34、 and other management, realize the communication with LC63n function interface driver program provided by USBD. The LC63n module for USB devices, the user process can be accessed through the USB device file and LC63n com

35、munication module. But in the actual operation, is to access the LC63n through virtual serial form, this is because the virtual serial port operation than USB simple operation. Because the use of virtual serial</p>

36、<p>  Implementation of driver function has two ways: one is driven by the module loading; two is the kernel directly load driver. The wireless network driver loads on the use of the latter. When the USB interface

37、 of LC63H device is inserted into the host, the specific process system load entrance point function, which is as shown in figure 8. </p><p>  Fig.8 the driver flowchart of system load </p><p> 

38、 5 The actual application and verification </p><p>  The system studied in the ecological garden. The garden use the ground fixed spray irrigation and drip irrigation system, in accordance with the garden cr

39、ops set sensor nodes in different deployment, each node is responsible for monitoring a regional soil temperature and humidity conditions. At the same time, each region by the competent power delivery and distribution pi

40、pe network of the branch pipe, each electromagnetic valve is connected with the irrigation controller, drip irrigation and spr</p><p>  6 Conclusions </p><p>  This paper puts forward the wirele

41、ss sensor network technology scheme for automatic control field of garden water-saving irrigation, and design a set of landscape irrigation system based on wireless sensor network. The system has strong flexibility, safe

42、ty and reliability, low power consumption, no need manual operation, avoid the wired access tedious and pitfalls can work stably for a long time, is a complement to the wired control mode. At the same time the paper for

43、landscape irrigation syste</p><p>  Reference </p><p>  [1] Mitra A, Najjar W, Bhuyan L.Compiling PCRE to FPGA for aceelerating SNORT IDS[J].In Proeeedings of the 3rd ACM/IEEE Symposium On Achit

44、eeture for networking and communication systems, Deeember, 2007 </p><p>  [2] Bispo J C, Sourdis I, Cardoso J M.Vassiliadis S.Regular expression matehing for reconfigurable Packet inspection[J].In IEEE Inter

45、national Conference on Field Programmable Technology (FPT'06), Dee.2006:119-126 </p><p>  [3] Cho Y H, Mangione-Smith W H.A partemmatching coproeessor for network seeurity[C].In Proceedings of the 42nd A

46、linual Conf.onDesign Automation (DAC'05), Jun.2005:234-239 </p><p>  [4] Paolieri M, Bonesan I, Santambrogio M D.ReCPU:a Parallel and Pipelined Architecture for Regular Expression Matehing[C].In Proc.IF

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