Basic Anatomy of a Crossbow Node

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Basic Anatomy of a Crossbow Node
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MICAz Platform
Now FCC/ARIB certified

• Microprocessor Atmel ATmega128L
• 7.3728 MHz clock
• 128 kB of Flash for program memory
• 4 kB of SRAM for data and variables
• 2 UARTs (Universal Asynchronous Receive and
  Transmit)
• Serial Port Interface (SPI) bus
• Dedicated hardware I2C bus
• Radio Chipcons CC2420
• External serial flash memory 512 kB
• 51-pin expansion connector
• Eight 10-bit analog I/O
• 21 general purpose digital I/O
• User interface 3 programmable LEDs
• JTAG port
• Powered by two AA batteries
• 1850 mAh capacity

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Microcontrollers and the ATMega128

• Careful consideration required when comparing
  different processor cores on systems performance
• Wake up from sleep ?1 ?sec.
• With the ATMega internal oscillator enabled
  XMesh does this automatically.
• Wake up gt 200 ?sec when using the external
  oscillator.
• Sleep current of ?10 to 15 ?A
• Battery performance in a Mesh is not limited by
  this difference
• Operating voltage
• Minimum input voltage specified at 2.7 V
• Most sensors and I/O devices wont operates to
  2.5 V
• Practical experience shows ATMega128 operates to
  2.3 V
• Note Chipcon radio typically doesn't operate
  below 2.1 V

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MICAz Roadmap

• 8 kB SRAM
• Further reduction in sleep current
• MICAz Postage Stamp
• July 05 release date
• Significantly reduced cost
• Surface mount (SMT) package

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Sensor and Data Acquisition Boards
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Typical Solution

• Select Sensor type based on Application
• Temp/Humidity/Light
• Security
• Industrial .

Xlisten PostgreSQL Database
MICAz Mote network w/ XMesh Routing
Mote-VIEW Client Tools
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Software Architecture
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Deployment Overview
Remote Database Use Mote-VIEW to view data
logged at a remote location
Proxy Logging Use serial forwarder to log
readings from a remote gateway in locally.
Local Logging Store data from local gateway to a
local database and view it all on one machine.
Gateway Forwards data from sensor network to
server.
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Data Visualization with MOTE-VIEW