ZigBee

1
ZigBee

• Calvin Choy
• David Kim
• Jason Chong
• Devin Galutira

2
Terra Spoon Members

• Calvin Choy
• Time Manager, Picaxe Coding
• David Kim
• Parts Guy, Grant Writer, Networking Protocol
• Jason Chong
• Researcher, Web Designer, Minutes Keeper
• Devin Galutira
• Networking Protocol

3
Project Overview

• What is ZigBee?
• Low power, low data wireless protocol
• Conduct wireless sensing and control applications
  
• No line of sight concerns
• 100-300 ft range

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Comparison to Others Technologies

• ZigBee
• (WPAN)
• 250 kbps
• Standby 2uA
• 32-60 KB memory
• 300ft

• Bluetooth
• WPAN/WLAN
• 1 Mbps
• Standby 200uA
• 100KB memory
• 328ft range

• WiFi
• WLAN
• Up to 54 Mbps
• Standby 20uA
• 100KB memory
• 300ft range

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Project Overview - Goals

• What can ZigBee do?
• How does ZigBee work?
• Learn Software and Hardware relationship
• Experiment with ZigBee

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Project Overview - Goals

• Evaluate current designs
• Fix bugs
• Make improvements and add-ons
• Research
• Think like a non techie
• ZigBee for non-ZigBee people

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Project Overview - Goals

• Identify a need
• Disabled, elders, and children
• Devise a prototype
• Application to make life easier
• Universal

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Overall Block Diagram of System

• Picaxe Submodules
• led indicators
• additional IC chips, i.e. multiplexers, decoders
• coding
• power supply
• Xbee submodules
• power supply

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Zigbee Module Case Diagram

• Improvements
• Led Status Indicators
• Possibly 5V or 3V
• power supply
• Air vents
• Approx 20 smaller
• Archimedes branded
• logo marketing

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Picaxe to XBee
2 Connections
-Tx / Rx -Sleep
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Universal Asynchronous Receiver / Transmitter
(UART)

8 bit register
8 bit register
Clock
Clock
data
data
12
Switching Circuit
Relay Circuit
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Tasks Left to be Done

• Hardware
• Study and solve current bugs
• Fabricate self printed circuit boards
• Manufacture durable cases for the modules
• Software
• Learn more about transmitting data
• UART
• Buffers and Overflow
• Implementing Sleep Mode
• Educational Kit
• Manual for non Zigbee People
• Product Testing

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Potential Downfalls

• Error in communication between modules
• Undesired results
• Bugs, bugs, bugs
• Hardware and Software
• Reducing size of modules circuit boards
• Power supply
• Different documentations suggest different
• power requirements
• Running out of time

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Wireless Mouse via head control Zigbee Solution
(Nice to Have Goal)

• Study old school mice w/roller balls
• Motion detected via velocity of spinning cog
• Analyze the I/0
• Simultaneous X Y motion
• Ergonomics
• Optimal range of motion
• Perceived field of vision
• Create a harness
• for the head with
• Zigbee transmitter

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Gantt Chart
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Tasks and Subtasks

• ZigBee Module (Projected Finish 10/12)
• Get XBee chips talking to one another (9/22)
• Get picaxe chips to transmit to one another
• 75 complete close, but not quite
• Plug-and-play
• Produce End Product (Projected at 11/6)
• User-friendly ZigBee Modules with documentation
• NTH Prototype for ZigBee Application (NICE TO
  HAVE)
• Alternate inputs for Zigbee