Transcript ZigBee Overview

Wireless Measurement
Cores Electronic LLC
10/26/2006
Cores Electronic LLC
Agenda
• ZigBee Overview
• IEEE 802.15.4 Radio
• Network Topologies, Security, Battery Life
• Modules Description
• Driver Software
• Performance
• Sales Info
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ZigBee Overview
ZigBee is a wireless standard that aims to do
for embedded command-and-control
applications what Wi-Fi did for wireless
networking.
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ZigBee Overview
The ZigBee standard and the lower level IEEE
802.15.4 standard, are open standards targeted
at home and building automation, consumer
electronics, PC peripherals, measurement ,
medical applications and toys.
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ZigBee Overview
What these applications have in common is:
1) the need for low-power operation, and
2) the scalability to enable networks with
thousands of devices.
The IEEE is responsible for the 802.15.4
standard, which defines the physical layer
(PHY) and the media access layer (MAC).
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ZigBee Overview
The ZigBee Alliance is a global nonprofit
consortium of over 60 industry leaders
including Philips, Motorola, Honeywell,
Invensys, Samsung, Mitsubishi, Microchip
Technology, Freescale Semiconductor, Texas
Instruments, etc.
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IEEE 802.15.4 Radio
The IEEE 802.15.4 standard specifies operation
in the 2.4 GHz band which is available
worldwide, and is also used by Wi-Fi and
Bluetooth.
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IEEE 802.15.4 Radio
The 2.4 GHz PHY employs offset quadrature
phase-shift keying (O-QPSK). Direct sequence
spread spectrum (DSSS) is used to improve
receiver sensitivity through processing gain,
and to ensure robustness in multi-path
environments and in the presence of interfering
signals.
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Network Topologies
The simplest network is a STAR network with a
single network coordinator connected to a
number of slaves.
Reduction in POWER
implemented using
SLEEP time
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Network Topologies
A second type of network is a cluster tree or
connected star network. This type of network
may be employed to extend the range of a star
network or to link two networks.
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Network Topologies
The third type of network is a MESH network. A
mesh network may extend over a large area
and contain thousands of nodes.
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Security
The standard provides three levels of security:
no security, access control lists and 32-bit to
128-bit AES encryption with authentication. The
security mechanisms prevent data from being
compromised, stolen, replayed or tampered
with.
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Battery Life
ZigBee was designed from the ground up for
ultra-low-power consumption. Many sensors
will be battery powered. Taking advantage of
the power-saving mechanisms built into the
radio protocol and low-power microcontrollers
(MCUs) can result in several years of operation
from a single battery.
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Measurement Network Components(1)
WN-USB Coordinator Module
WN-Measurement Modules
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Measurement Network Components(2)
WN-Ethernet Coordinator Module
WN-Measurement Modules
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Application
Wireless SENSOR reading.
The SENSORS can measure – Voltage, Current,
Temperature, Humidity, Gas, Water, etc - and
send their measurements either directly or from
sensor to sensor in a mesh network to a PC
consolidator.
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Modules OFFERING
CUSTOM modules = modules that we build
according to customer specifications for
SENSOR or Communication interface.
READY-MADE modules = modules that are
of general nature and we have in stock and
can produce in large quantities.
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Modules Description
Coordinator Modules:
WN-USB
USB - to - ZigBee
WN-Ethernet
Ethernet - to - ZigBee
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Modules Description
Measurement Modules:
WN-AI
Voltage Input
2-ch RSE, 18-bit, Delta-Sigma 240S/sec,
Range: +/-10V
Input Impedance: 1M
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Modules Description
Measurement Modules:
WN-Current(4-20mA)
Current Input
2-ch RSE, 18-bit, Delta-Sigma 240S/sec,
Range: +/-10V
Input Impedance: 1M
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Modules Description
Measurement Modules:
WN-DIO
Digital Input/Output
4-ch, bit-programmable
Input: TTL / CMOS; Schmitt Trigger
Output: Open Collector
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Modules Description
Measurement Modules:
WN-CNT
Counter
2-ch, 32-bit
Input Levels: TTL / CMOS
Input Type: Schmit Trigger
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Modules Description
Measurement Modules:
WN-RLY
Relays
2-ch, Form C Relays
Nominal switching capacity …..1A at 30 VDC, or 0.5A at 125VAC
• Max switching power ………….30W, 30VA
• Max switching voltage …………60 VDC, 125VAC
• Max switching current …………1A
• Min switching capacity …………1mA, 110VDC
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Cores Electronic LLC
Modules Description
Measurement Modules:
WN-RLY
Relays
2-ch, Form C Relays
Nominal switching capacity …..1A at 30 VDC, or 0.5A at 125VAC
• Max switching power ………….30W, 30VA
• Max switching voltage …………60 VDC, 125VAC
• Max switching current …………1A
• Min switching capacity …………1mA, 110VDC
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CUSTOM Modules
On our existing Measurement Node platform,
that is made of uC + Power + Radio circuitry,
We can accommodate custom SENSOR(s) or
custom Conditioning Circuitry in order to build
what we call a Custom Module. Together with
this custom module we also provide a driver
supported in LabVIEW or C.
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Examples of CUSTOM Modules
Temperature
Humidity
Vibration
Displacement
Level
etc
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WSN Software
The WN Family of modules driver software
has two components:
WN-API
WN Explorer
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WSN Software Architecture
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WN - API
The WN-API contains three function groups:
Connect/Disconnect Node
Measurement
Add and Configure Measurement Node
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WN - API
Connect / Disconnect Node
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WN - API
Measurement Functions :
WN_AIRead.vi
WN_CurrentRead.vi
WN_DIOReadPort.vi
WN_DIOWritePort.vi
WN_DIOConfigure.vi
WN_DIOReadLine.vi
WN_DIOWriteLine.vi
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WN_CNTStart
WN_CNTRead
WN_CNTStop
WN_RLYSet
WN - API
Measurement Functions
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WN - API
Add and Configure Measurement Node :
WN_AddNode
WN_DeleteAllNodes
WN_DeleteNode
WN_LoadConfiguration
WN_SaveConfiguration
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Wireless Nodes Explorer
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Performance
Battery Power
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Performance
Measurement Determinism
the RADIO layer, and the APPLICATION layer.
Command transmission and data availability
in the wireless sensor network have the
determinism of :
Two radio Sleep Periods +
Measurement time +
any delay caused by OS related tasks.
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Sales Information
Cores Electronic LLC
www.coreselectonic.com
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DEMO
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