GPS

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As of today (March 2008) the two best GPS chipsets available are the SiRF Star III and MTK MT3318. They offer fast initial fix and can utilize weak GPS signals by massive parallel correlation computing power [1].

SiRF Star III

SiRF commands

MTK MT3318

= Enable 5 Hz

The default update frequency is 1 Hz, or once per second, the MTK chipsets support 5 Hz.

> $PMTK300,200,0,0,0,0*2F
> $PMTK251,115200*1F
> $PMTK300,200,0,0,0,0*2F

Hacks

MTK commands

Other chipset brands

  • SkyTraq
  • Nemerix
  • uBlox
  • uNav
  • Sony
  • Fujitsu

Tools

References