Final Zigbee

8/7/2019 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

Documents

Final Zigbee