13-12-2010, 09:53 PM
A ZigBee-Based Home Automation System
Nisanth V Issac
S7 A
Nisanth V Issac
S7 A
Overview
Introduction
Existing Home Automation Technologies and its analysis
Features of the proposed system
System Architecture
System initialization/implementation
Conclusion
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Introduction
What is Home Automation?
Anything that gives you remote or automatic control of things around the home.
What is Zigbee?
a low-cost, low-power, wireless networking standard
Based on IEEE 802.15.4
operates in the ISM radio bands
Low data rate (approx 250 Kbit/s)
Range of operation - 30 to 100 m
Wi-Fi
Term Wi-Fi refers to wide fidelity
Commonly used WLAN
Uses the 2.4GHz ISM band
High Data rate
Existing Home Automation Technologies
Java based system
Bluetooth
Phone based system
Hand Gestures
IEEE 1394 based system
Analysis of the Existing Systems
Complex and expensive architecture
Intrusive installation
Lack of network interoperability
Interface inflexibility
Security and safety
Features of the proposed system
Reduced Complexity
Low cost
Flexible and Scalable
Variety of controls
Remote monitor and control
Secure and Safe
Why Zigbee and WiFi?
Wi-Fi for high data rate applications
ZigBee for devices with out Wi-Fi
Access to the home automation system from Wi-Fi enabled devices like mobile phones
Can exist together with less interference problems
System Architecture
Home Gateway
Consists of Wi-Fi module, ZigBee Microcontroller and power supply
Primary Function - Data translation services between the internet, Wi-Fi and ZigBee networks.
Real time control and monitoring of devices using device database
Flexible control modes
Virtual Home
A Software construct in C
Responsible for security and safety
Check sender authentication
Check for errors
Encrypt Messages
Virtual Home Flow Chart
Zigbee remote control
It includes
Integrated Remote Controller
ZigBee to IR Converter
ZigBee Power Adapter
Integrated Remote Controller(IRC)
ZigBee module- Acts as a coordinator
IR Receiver- take Ir signals from other remote controllers for learning
ZigBee to IR Converter (ZB2Ir)
Converts ZigBee signals from the IRC into the specific infrared signals
Broadcasted to all devices in the transmission range
ZigBee Power Adapter(ZPA)
For electrical appliances with no control equipment
uses solid state relay
Network
Uses Mesh topology- to overcome a disconnection due to obstacles
System Initialization/ implementation
Network initialization phase
Scans all available radio channels
Assign MAC address for all devices in the network
Wi-Fi connection through ADSL modem router
Home Gateway connects with ZigBee and Wi-Fi network
Input to Home Gateway can be either from Wi-Fi or ZigBee network
Conclusion
Identified the problems of existing home automation systems
Solved the problem of network interoperability
A low cost ,flexible and secure system is proposed
Reference
A ZigBee based Home Automation System
By Khusvinder Gill, Shuang-Hua Yang, Fang Yao and Xin Lu
Consumer electronics,IEEE Transactions,Vol 55,Issue 2,May 2009
Home Network Configuring Scheme for All Electric Appliances Using ZigBee-based Integrated Remote Controller
By Il-Kyu Hwang
Consumer electronics,IEEE Transactions,Vol 55,Issue 3,August 2009
ZigBee based Home Automation Wireless sensor network
By Michal Varachola
Acta Electrotechnica et Informatica No. 4, Vol. 7, 2007
