[time-nuts] Msg to N.Z. time nuts

Hal Murray hmurray at megapathdsl.net
Tue May 19 04:00:16 UTC 2009


lists at philpem.me.uk said:
>>> Interesting that the three receivers with issues were all SiRF III
>>> based. Do  you know what firmware these were running? 
 
>> Nope.  If you know the recipe to find out, I'll ask them.  :)
 
> Failing that, the "sirfmon" app that comes with gpsd might get the
> receiver  into binary mode and should let you talk to it, but I
> haven't used it. 

Thanks.  That works for me.

I started collecting low cost GPS receivers a year or two ago.  I thought I 
had some with the SiRF-II chips.  Either I can't find them or I didn't 
actually get any.

  GSW3.2.4_3.1.00.12-SDK003P1.00a  GlobalSat BU-353

  GSW3.2.2_3.1.00.12-SDK003P1.01a  AmbiCom GPS-USB Rev 2.1
  GSW3.2.2_3.1.00.12-SDK003P1.01a  Navibe GM-720

  GSW3.2.4Pat2_3.1.00.12-SDK001P1.00  Navisys GR-300

The first 3 are "GPS mice", small with long USB tails.  The last one is a 
Thumb/Dongle, only a bit bigger than the typical USB Flash drive.

They all use the Prolific PL2303 serial-to-USB chip.


In case nobody hasn't noticed, the price for simple GPS "mice" has been 
dropping.  It's easy to find them advertised for under $40.  Unfortunately, I 
haven't been able to get good time out of the USB versions.  The old Garmin 
GPS-18-USB was actually pretty good.  The new 18x isn't very good.


-- 
These are my opinions, not necessarily my employer's.  I hate spam.






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