Zigbee is a synonym for IEEE 802.15.4 protocol. According to the agreement of the technology is a short-range, low-power wireless communications technology. The name comes from the character dances of bees, because bees are flying by and the "buzz" to shake the wings of the "dance" to transfer pollen with peers where the location information, the way that bees rely on such communication constitutes a group network. Its characteristics are close, low-complexity, self-organizing, low power, low data rate, low cost. Mainly suitable for use in the field of automatic control and remote control can be embedded in various devices. In short, ZigBee is a cheap, low-power short-range wireless group Netcom Information Technology.
B. Udaya Kumar et. al. / International Journal of Engineering Science and Technology Vol. 2(8), 2010, 3391-3395 IMPLEMENTATION OF LABVIEW BASED PACKET LOGGER FOR ZIGBEE NETWORK S B. UDAYA KUMAR ES Department of Electronics & Instrumentation Engineering, GITAM University, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India B. VENKAT PR Department of Electronics & Instrumentation Engineering, GITAM University, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India Dr. D.S.MURTY Department of Electronics & Communication Engineering, GVP College of Engineering, Madhurwada, Abstract: IN Visakhapatnam, Andhra Pradesh 530045, India ZigBee is a wireless technology being deployed for wireless sensor networks. Low data rate personal area network applications like smart home automation, greenhouse monitoring and healthcare use ZigBee, a high level communication protocol as a standard to acquire the data. The data from the sensor nodes are monitored and logged S using packet sniffer. The available sniffers in the market need additional hardware with dedicated software which costs more. Also the packet sniffer has to be compatible with the sensor node hardware. In this paper, sniffing of packets at the base station is implemented using LabView. With Texas Instruments Z-Accel Modules, a tree LE topology is established and temperature is monitored, logged with time stamping and packet data analysis is presented. Keywords: ZigBee; Wireless Sensor Networks; cc2480 radio. 1. Introduction C Wireless technologies have been rapidly developed during recent years used in applications like smart home automation, greenhouse monitoring, and healthcare . The existing technologies are Bluetooth, Wi-Fi, Wi-Max, TI wireless mobile Ad-hoc network (WMANET), UMB, wireless HART, Bluetooth and ZigBee. Wireless sensor networks are formed by communicating over wireless links without using a fixed networked infrastructure. ZigBee is the name for a short-range, low-power, low-cost, and low-data-rate wireless multi-hop networking technology standard. A ZigBee network consists of three types of logical devices viz. coordinator (Full Function Device, FFD), R router and an end device (Reduced Function Device, RFD) . The coordinator is the first device on the network which starts, configures and manages the network . This also selects the network identifier which is the Personal Area Network (PAN ID) and one amongst the 16 channels in the A range of 2.4-2.4835GHz. When the coordinator is ready, the other devices can join this network. ZigBee supports various network topologies such as star, peer-to-peer, cluster tree and mesh .This paper presents the establishment of a ZigBee network with a tree topology, monitoring and logging of packet data using Labview. ISSN: 0975-5462 3391 B. Udaya Kumar et. al. / International Journal of Engineering Science and Technology Vol. 2(8), 2010, 3391-3395 2. Experimental setup and network establishment The experimental setup is as shown in the figure 1. The network is established using Texas Instruments Z-accel module where ZigBee Stack runs on a ZigBee Processor and the application runs on an external microcontroller . The sensor node hardware is embedded with an application processor (Microcontroller MSP430F2214) and a S ZigBee processor (CC2480 ZigBee processor). C-Coordinator ES R-Router-source C E-End device R R PR E E E E Figure 1 Experimental Setup Figure 2 Tree network topology The application processor configures the CC2480 as a FFD or RFD using Application Program Interface (API) calls IN and Remote Procedure Calls (RPC). The API calls provides the necessary functions to establish a ZigBee wireless sensor network . After the configuration procedure, each device registers with the application profile. An application profile defines the input, output commands and data format exchanges between the devices on the network. The application software binds the devices with a logical link at the application layer. With the binding feature, the application transfers the data packet without knowing the actual destination address.The sensor node S has on chip temperature sensor, measures the temperature and periodically sends the data to the base station. The network topology, shown in figure 2, is considered for experimentation. The network consists of one LE coordinator and two router- sources and four end devices. 3. Nodes Software Design The application software comprises of a source and a sink. The source transmits the temperature data and sink receives it. The flow charts for coordinator, router and end device are as shown in figures 3, 4, 5 respectively. C The packets arrive at the base station through a Virtual COM port which is read using LabView .The block diagram of the VI implemented for one node is as shown in the figure 6. TI R A ISSN: 0975-5462 3392 B. Udaya Kumar et. al. / International Journal of Engineering Science and Technology Vol. 2(8), 2010, 3391-3395 Power up device Power up device Power up device S No No Button Button No Button pressed for pressed for pressed for Once? twice? ES Once? Yes Yes Yes Send Send Send ZB_WRITE_CONFIGURATION ZB_WRITE_CONFIGURATION ZB_WRITE_CONFIGURATION Coordinator Router -Source End Device PR Register Application profile Register Application profile Register Application profile Send Permit Join Request and Bind with Coordinator IN Bind with near Router Allow Binding and allow other devices to join Send Data periodically Wait for other devices to join Bind No Confirmed Figure 5 End Device S No Is Any LE Device Yes Joined Send Data Yes If any child joined then route the Receive data and process data C Figure 3 Coordinator Figure 4 Router TI Using the event driven programming technique in LabView, the packet received at base station is stored in an array. The length of array is based on the size of the packet. A 17 byte packet arrives the virtual com port every 15sec from each node. The packet consists of parameters like Start of Packet (SoP), source address, destination address, R temperature value, node battery voltage, Frame Control Check (FCS), Received Signal Strength Indicator (RSSI), Number of hops, acknowledgement, list of input commands, list of output commands, profile ID, number of packets sent. The data in the array is logged into spreadsheet with respective time stamping for further analysis. A ISSN: 0975-5462 3393 B. Udaya Kumar et. al. / International Journal of Engineering Science and Technology Vol. 2(8), 2010, 3391-3395 S ES PR IN Figure 6 Block Diagram of Node 1 S 4. Results and Discussions LE The tree topology for ZigBee based WSN is established and observed using TI’s ZigBee Sensor Monitor, shown in figure 7. The Virtual Instrument (VI) is developed using NI LabView for the six nodes, shown in figure 8, is used to monitor graphically the temperature at each node. The total number of packets sent, received, and the number of received for 15 minutes data is presented, shown in figure 9. C TI R A Figure 7 Network View ISSN: 0975-5462 3394 B. Udaya Kumar et. al. / International Journal of Engineering Science and Technology Vol. 2(8), 2010, 3391-3395 S ES PR Figure 8 Front Panel of the WSN IN S LE Figure 9 Packets Observed 5. References C  David Egan, the Emergence of ZigBee in Building Automation and Industrial Control, IEE Computing & Control Engineering, May 2005, pp 14-19.  B. Udaya Kumar, B. Venkat, ZigBee Based Wireless Motor Speed Control, International Journal of Engineering and Information technology, TI Volume: 01 Number: 2 Oct 2009, pp 115-120.1  ZHANG Qian et al., A wireless solution for greenhouse monitoring and control system based on ZigBee Technology, Journal of Zhejiang University SCIENCE A, 2007 8(10):1584-1587  Texas Instruments’ CC2480 Interface Specification SWRA175A  HSIN-MU TSAI et al., Zigbee-Based Intra-Car Wireless Sensor Networks: A Case Study, IEEE Wireless Communications • December 2007, pp 67-77 R  Gary W. Johnson, Richard Jennings, LabView Graphical Programming, 4th edition, MGH  John H. Davies, MSP430 Microcontroller Basics, Newnes, 2008  José A. Gutiérrez, Edgar H. Callaway Jr., Raymond L. Barrett Jr. Low-Rate Wireless Personal Area Networks; Enabling Wireless Sensors with IEEE 802.15.4TM . Standards Information Network, 2003. A  ZigBee Specification document, ZigBee Alliance, 2007 ISSN: 0975-5462 3395
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