Yo Hal! On Sat, 03 Jun 2023 21:53:34 -0700 Hal Murray via devel <devel@ntpsec.org> wrote:
> Gary said:
> > To open to read binary:
> > tty = open("/dev/ttyACM0", "rb")
> > The line will be binary. Getting just the NMEA out will be fun.
>
> Thanks. That's what I needed.
Good.
> There is no problem getting just the NMEA. I'm using isASCII to
> detect the garbage cases.
Cool.
> I get things like:
> ### Not ASCII 2023 Jun 3, 22:46:41 UTC
> ###
> "$GLG\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\x
> cd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\
> xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd\xcd
> \xcd\xcd\xcd$GLGSV,3,3,11,87,43,333,,88,01,306,,90,13,029,*5A"
>
> I get several bogus lines each day. I haven't seen anything other
> then 0xcd in the non-ASCII part.
Weird... Since ttyACM0 is USB, maybe a driver thing.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
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