The eyesIFX platform

1
The eyesIFX platform

• Vlado Handziski
• Technical University Berlin
• Filling in for
• Thomas Lentsch
• Infineon Technologies, AG

2
Infineons eyesIFX Platform

• Developed by Infineon for the Energy-efficient
  self-organizing and collaborative wireless sensor
  networks project EYES
• TI MSP430 microcontroller family
• 64 kbps 868MHz ASK/FSK Infineon Wireless
  Transceiver TDA5250
• HW UART based byte interface towards the radio
• Integrated Temperature and Light sensors
• Full TinyOS software support provided by TU Berlin

3
eyesIFXv2 Node Architecture
4
The eyesIFXv2 Mote
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TDA525x Block Diagram
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TDA525x - Feature List

• Technology 0.5µ 25GHz BiCMOS-Process
• Frequency bands 315MHz (TDA5251)
• 433MHz (TDA5255)
• 868MHz (TDA5250) 915MHz (TDA5252) (from Q2/05)
• Data rate 1..64 KBit/s
• Deviation / Mod. index 10..150KHz / mH gt 2
• Sensitivity ASK lt -110 dBm _at_ 50W, BER 10-3
• FSK lt -100 dBm _at_ 50W, BER 10-3
• Transmit power Pout up to 13 dBm _at_ 50 W
• Supply voltage 2.1..5.5V
• Current consumption TX typ. 10mA RX typ. 8 mA
  _at_ 3V
• Power down max. 100nA
• Temperature range -40C / 85C
• Self-polling with fast data rate detection easing
  CSMA protocol implementation, on-chip data and
  channel filters set via I²C or SPI bus

7
eyesIFXv2 Deployments

• TU Berlins WSN Testbed
• Testing WSN building automation applications in
  realistic setting
• About 50 instrumented rooms, more then 120 nodes
  spread on four floors of the TKN office building
• USB back channel allowing remote control and
  debugging

8
Summary

• Initially developed as research platform for the
  EYES project
• Targets the low-power end of the WSN application
  spectra
• Shows how the cost of the WSN platforms can be
  reduced by reusing designs from related high
  volume markets
• TDA 5250 family originally developed for the
  Remote key-less car entry application
• Node design influenced by Infineons wireless
  tire pressure measurement solutions
• eyesIFXv2 motes (868MHz) commercially available
  in Q2/05, after the end of the EYES project