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This module is now end of life and given the altitude limit can no longer be considered suitable for High Altitude ballooning with the newer latex balloons.

SiRFstarIII™ 20-channel GPS SMD compact module/receiver with enhanced high altitude power saving modes.

The ISM300F2-C5-V0004 module is programmed with HIGH ALTITUDE BUILD, ceiling 135,000 feet, and works at cold temperatures for balloon applications.


  • SiRF Binary at 57600 baud on port A
  • NMEA at 4800 baud on port B
  • Maximum altitude of 42000 meters (137795 ft)
  • 18mm X 18mm x 3mm
  • Surface Mount Component.

More information to come. Used on Ava flight computer. Project Ava

External link : ISM300F2-C5-V0004

guides/inventek-ism300.txt · Last modified: 2012/06/03 14:41 by upu

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