New 0.5 draft of the SemPiTernal HOWTO

[Eric S. Raymond]

Frank Nicholas <frank at nicholasfamilycentral.com>:
> Hello Eric,
> 
> Regarding the “mode” setting, for the Adafruit HAT & Ultimate GPS Breakout, I had the following in my notes:
> 
> We want "mode" set to 18:
> 16 = 9600 baud
> 2  = use PGGGA sentence for time
> We want to use PGGA sentence because it appears first, closest to
> the start of the second in each cycle.

I think you mean GPGGA, but yes.  I just checked with gpsmon and it is indeed
first in the cycle

> You have mode set to 17, using message GPRMC.  Can someone who knows
> more than me, explain to me if it really matters?

It probably doesn't.  I copied this config frome somewhere.

RMC supplies date information, which GGA does not. As farvas I know the
drive doesn't use it.

> Regarding the 9600 baud, in another thread Gary Miller says we
> should up the baud rate higher than 9600.  Maybe he can reply with a
> recommendation for this.

It would cut latency a bit.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>