[ntp:questions] Sure GPS: Programming it now works

Uwe Klein uwe at klein-habertwedt.de
Fri Apr 8 09:35:20 UTC 2011


Terje Mathisen wrote:
> I can try that as well, but it really does seem like this is the full 
> list of what you can get (notice PMTKCHN has room for up to 32 sats!)
over the days I see 49 distinct sats ;-) highest satno 02 .. 51
> 
> $PMTKCHN,23322,32182,11382,31272,24282,20192,17432,13252,25031,50001,04001,12031 
> 
> ,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,00000,0 
> 
> 0000,00000,00000,00000,00000,00000,00000*44<CR><LF>
> 
> What I have found though, by trial & error, is that my board can run at 
> a little over 3 Hz:
> 
> I can ask for any update interval from 307 ms and up, so 333 ms is fine.
> 
> When I ask for 200 ms (5Hz) I get a '2' response, i.e. command was OK 
> but could not be executed.

Do you get distinctly different sentences or a rehash?
Is that dependent on the buquet of sentences configured
or is the device "out-timeslotted" for extra work?

( OT: I had looked into GPS attitude "compass" devices for a potential customer.
   first seen usage some years ago by Armadillo Aerospace for attitude control
     exorbitantly expensive 5..10k€. I'd like to have a cheap dual antenna device )
> 
uwe





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