Wireless Control with ZigBee

1
Wireless Control with ZigBee

• Final Presentation

Students Yossi Lempert Natan
Keren Instructor Konstantin Sinyuk
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Introduction

• Smart House topic continue
• Latest projects Home Wireless Control, Remote
  Controller for Smart House
• New technology ZigBee
• Reminder fresh new Microchip kit, late start

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Project Goals

• Learn the ZigBee protocol and its constrains
• Learn the PicdemZ kit
• Implement an Access Point End Point
  communication via ZigBee
• Add simple Hyper Terminal based control

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ZigBee

• Simpler and cheaper than existing wireless
  protocols and hardware

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ZigBee cont.

• Four layers Physical, Mac, Application
  sub-level
• Three predefined unit types
• RFD simplest node, system interaction only
• FFD can transfer other units data
• Coordinator can serve as a network root and
  hold data about it, can be a bridge between
  networks

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ZigBee vs. Bluetooth

• Cost 3 for Bt node, 1.1 for ZigBee
• But, microcontroller support needed for ZigBee
  for now
• Code size 10 of BT code size in most capable
  node, 2 in the simplest one
• But, 50 in actual node

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ZigBee vs. Bluetooth

• New developing protocol vs. finalized product
• Next generation or commercial alternative?
• Low power consumption, small size both
• Simple protocol model vs. complicated
  multi-layered one
• Networking design in ZigBee

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PicdemZ Hardware

• 2.4 GHz RF transceiver
• 64 KB flash memory
• PIC18LF4620 microcontroller
• 2 9v battery

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PicdemZ Software

• ZigBee Stack support
• Microchip MPLAB ICD2
• Microchip MPLAB IDE available on Microchip site

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Block Diagram

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Access Point

• Holds internal devices binding tables
• Holds neighbors tables
• Performs all the logic

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End Point

• Simple unit
• Responds AP messages and commands

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Hyper Terminal Controller

• Simple Remote Controller via serial port
• Built into the Coordinator code

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Functionality

• Set ID
• Create binding
• Clear binding table
• Clear neighbors table
• Perform action

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Communication algorithm

• Bluetooth AP inquires for EP and initiates
  connection
• ZigBee EP scans for available APs and initiates
  connection
• Further logic is performed by AP in both cases

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Difficulties

• New technology
• Very basic stack, almost no networking
• Hard to debug
• Resets and burnings after every change
• Lose of connection possibly RF or stack problem

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Debug

• No ICD2
• NO LEDs
• Lots of prints and messages to Hyper Term
• Burn and test

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Summary

• Easier system easier life
• Its a brick in the wall
• The system and technology do stand expectations
• Future large network, integration into larger
  system
• ZigBee develops new kits and stacks

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Thanks to everyone