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Permalink Reply by Dr B Holt on April 29, 2012 at 2:08pm

Check http://diydrones.com/forum/topics/gps-position-hold-in-quadcopter.  It has a string to set it to 0.2 m/s.  I used it and it worked.

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Permalink Reply by John Bond on May 1, 2012 at 10:07pm

Yes, it's on by default and set to 1 meter per second.

You can find the command reference here:

http://www.adafruit.com/datasheets/PMTK_A08.pdf

$PMTK397,1.0*3C       <= 1 meter per second

$PMTK397,0*23           <= 0 meters per second or off

Note that this is for standard NMEA mode.  When switching to DIYD binary mode the filter seems to be set to zero or close to it.

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Permalink Reply by Ken on May 11, 2012 at 4:32pm

John is correct, and the unit will reset to its defaults when power is removed. The command will have to be sent to the unit after each power up. Wait a half second or so to ensure the GPS is booted and in the mood to receive commands.

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