Download - Final Zigbee
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Zigbeenavigator
Presented by
Rakesh
SandeepAnkit
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OBJECTIVE
Controlling the navigation of robot using
Zigbee technology.
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PROJECT OVERVIEW
Robot
Driver Motor
MicrocontrollerPC
ZigBee ZigBee
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What is Zigbee ? Zigbee is a wireless networking technology.
ZigBee is the set of specifications built around
the IEEE 802.15.4 wireless protocol.
ZigBee technology is a low data rate, low power
consumption, low cost, wireless networking
protocol targeted towards automation and remote
control applications.
Zigbee ideal for harsh radio environments in
isolated locations.
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Why the name Zigbee ? The name "ZigBee" is derived from the
erratic zig zag patterns many bees make
between flowers when collecting pollen.
This is suggestive of the invisible webs of
connections existing in a fully wireless
environment, similar to the way packetswould move through a mesh network.
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Need for Zigbee ZigBee was created to satisfy the market's need
of a standards-based wireless network that is cost-effective
supports low data rates
low power consumption
secure and reliable
ZigBee is the only wireless standards-basedtechnology:
that addresses the unique needs of remote monitoring & control,and sensory network applications.
enables broad-based deployment of wireless networks with lowcost, low power solutions.
provides the ability to run for years on inexpensive primarybatteries for a typical monitoring application
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Zigbee Alliance The ZigBee Alliance is an association of
companies working together to enable
reliable, cost-effective, low-power,
wirelessly networked, monitoring and
control products based on an open global
standard ( IEEE 802.15.4 PAN )
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TECHN
OLOGY COMPARISION
SStandard
ZigBee802.15.4
Wi-Fi802.11b
Bluetooth802.15.1
Transmission range(meters)
1 100* 1 - 100 1 10
Battery Life (days)100 1,000 0.5 5.0 1 - 7
Network Size (# ofnodes)
> 64,000 32 7
ApplicationMonitoring &
ControlWeb, Email,
VideoCable
Replacement
Stack Size (KB)4 32 1,000 250
Data rate (kb/s)
20 250 11,000 720
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ZigbeeCharacteristics Zigbee operates is one of three license free bands
2.4 GHz, 915 MHz for North America, and 868 MHz for Europe
At 2.4 GHZ, there are a total of 16 channels available with amaximum data transfer of 250 kbps
At 915 MHz: 10 channels for a max 40 kbps transfer rate At 868 MHz: 1 channel for a max 20 kbps transfer rate
ZigBee incorporates a CSMA-CA protocol
This protocol that reduces the probability of interfering with other usersand automatic retransmission of data ensures robustness.
By determining when to transmit, unnecessary clashes are avoided.
Yields high throughput and low latency for low duty cycle deviceslike sensors and controls
Optimized for low duty-cycle applications providing long battery life(
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ZigbeeCharacteristics128-bit AES encryption Provides secure connections
between devices
Support for multiple network topologies : star, peer-to-peer, mesh
Addressing space of up to 64 bit IEEE address devicesUp to 65,535 nodes on a network
Optional guaranteed time slot for applications requiringlow latency
Fully reliable hand-shaked protocol for transfer
reliabilityRange: 50m typical (5-500m based on environment)
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DATATRA
NSFER
Information in a Zigbee network is transferred in packets
Each packet has a maximum size of 128 bytes, allowingfor a maximum payload of 104 bytes.
The Zigbee specification supports a maximum datatransfer rate of 250 kbps for a range of up to 30 meters
A Zigbee network has an optimal super frame structurewith a method for time synchronization
For priority messages, a guaranteed time slot mechanism
has been incorporated . This allows high prioritymessages to be sent across the network as rapidly aspossible.
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ZIGBEETOPOLOGY Zigbee Supports 2 Topologies
Star topology
Peer to Peer topology
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STARTOPOLOGY
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PEERTOPEERTOPOLOGY
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ZIGBEEN
ETWORKMOD
EL
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APPLICATIONS
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MICROCONTROLLER
8051 DevelopmentBoard8051 DevelopmentBoard
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8051 FAMILY 8051 is a 8-bit micro controller introduced byIntelCorp in 1981. It
has 128 byte of RAM, 4K bytes of on-chip ROM, two timers,one
serial port and four i/o ports each of 8-bit wide on single chip.As it
is 8-bit micro controller only 8 bits data can be processed at a time.
8051 has a total of 5+1 Interrupt sources, 5 software and 1hardware.
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BLOCK DIAG OF 8051
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STEPPER MOTOR
UNI-POLAR:
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IN
PUTCOMBIN
ATION
SStep WB2 WB1 WA2 WA1
0 0 0 0 1
1 0 1 0 1
2 0 1 0 0
3 0 1 1 0
4 0 0 1 0
5 1 0 1 0
6 1 0 0 0
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ULN2803
DRIVER
It contains eight darlington
transistors with common emitters and
integralsuppression diodes for inductive loads.
Each
darlington features a peak load current
rating of
600mA (500mA continuous) and can
withstand atleast 50Vin the off
state. Outputs maybe paralleled forhigher current capability
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THAN
KYOU