GPS interface
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Posts: 46,084
I would like to know if anyone has ever interfaced a GPS device to a BS2.
If so could you give me some specifics as to the model GPS and where to get
one and some direction as to how to build the interface.
Thanks,
Wayne Fulcher
wayne@d...
If so could you give me some specifics as to the model GPS and where to get
one and some direction as to how to build the interface.
Thanks,
Wayne Fulcher
wayne@d...
Comments
I have interfaced numerous devices so far including Axiom and Sirf. It is
somewhat easy as these OEM modules emit a serial line that can be interfaced
with the stamp BS2 and just control the display of the serial data in a
format for video overlay and LCD serial displays.
Look at
www.axiomnavigation.com
under GPS receivers and then look at their Swift B1 module. This works the
best. Also look at :
www.decadeengineering.com
They have an old application under their site for their BOB -II board which
is a good starting point
good luck
Mike Mocenter
mocenter@e...
Original Message
From: Wayne Fulcher <wayne@d...>
To: Basic Stamp <basicstamps@yahoogroups.com>
Sent: Thursday, February 01, 2001 3:15 PM
Subject: [noparse][[/noparse]basicstamps] GPS interface
> I would like to know if anyone has ever interfaced a GPS device to a BS2.
> If so could you give me some specifics as to the model GPS and where to
get
> one and some direction as to how to build the interface.
>
> Thanks,
>
> Wayne Fulcher
> wayne@d...
>
>
>
>
http://www.axiomnav.com/
and
http://www.decadenet.net/
Mike
has a serial interface that would be a breeze to connect with a stamp and an
LCD display.
The sensor sends NMEA 0183 format "sentences" which are very simple to
parse. If you go to the garmin web site download their "specifications" and
it shows all the message formats etc.
I'm thinking of doing this myself... but I'm on a shoestring budget right
now. :-)
You can get an "evaluation kit" for a bit over $100 US which consists of the
receiver, and antena, a couple of DB-9 serial cables ... what else do you
need? A Stamp and a display... all set... :-)
Original Message
From: "Wayne Fulcher" <wayne@d...>
To: "Basic Stamp" <basicstamps@yahoogroups.com>
Sent: Thursday, February 01, 2001 12:15 PM
Subject: [noparse][[/noparse]basicstamps] GPS interface
> I would like to know if anyone has ever interfaced a GPS device to a BS2.
> If so could you give me some specifics as to the model GPS and where to
get
> one and some direction as to how to build the interface.
>
> Thanks,
>
> Wayne Fulcher
> wayne@d...
>
>
>
>
chore - seems like it took me about a page of code to do that (my gps had
non fixed length fields).
richard
Original Message
From: "Don Russell" <drussel2@s...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, February 01, 2001 7:17 PM
Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> Have a look at te garmin (www.garmin.com) OEM sensors... there's one that
> has a serial interface that would be a breeze to connect with a stamp and
an
> LCD display.
>
> The sensor sends NMEA 0183 format "sentences" which are very simple to
> parse. If you go to the garmin web site download their "specifications"
and
> it shows all the message formats etc.
>
> I'm thinking of doing this myself... but I'm on a shoestring budget right
> now. :-)
>
> You can get an "evaluation kit" for a bit over $100 US which consists of
the
> receiver, and antena, a couple of DB-9 serial cables ... what else do you
> need? A Stamp and a display... all set... :-)
>
>
Original Message
> From: "Wayne Fulcher" <wayne@d...>
> To: "Basic Stamp" <basicstamps@yahoogroups.com>
> Sent: Thursday, February 01, 2001 12:15 PM
> Subject: [noparse][[/noparse]basicstamps] GPS interface
>
>
> > I would like to know if anyone has ever interfaced a GPS device to a
BS2.
> > If so could you give me some specifics as to the model GPS and where to
> get
> > one and some direction as to how to build the interface.
> >
> > Thanks,
> >
> > Wayne Fulcher
> > wayne@d...
> >
> >
> >
> >
>
>
>
>
fields all contain leading zero characters as needed)... and as for
converting the ascii text to numbers.... the stamp LOOKDOWN or (LOOKUP?)
command would work.... should only take a few lines of code
Even with variable length fields, the garmin terminates each field with a
comma, and the whole sentence with <CR><LF>
Original Message
From: "dakota" <rfriedrich@a...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, February 02, 2001 6:54 AM
Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> yes easy to parse but converting the characters into numbers is
non-trivial
> chore - seems like it took me about a page of code to do that (my gps had
> non fixed length fields).
>
>
> richard
>
>
>
Original Message
> From: "Don Russell" <drussel2@s...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, February 01, 2001 7:17 PM
> Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
>
>
> > Have a look at te garmin (www.garmin.com) OEM sensors... there's one
that
> > has a serial interface that would be a breeze to connect with a stamp
and
> an
> > LCD display.
> >
> > The sensor sends NMEA 0183 format "sentences" which are very simple to
> > parse. If you go to the garmin web site download their "specifications"
> and
> > it shows all the message formats etc.
> >
> > I'm thinking of doing this myself... but I'm on a shoestring budget
right
> > now. :-)
> >
> > You can get an "evaluation kit" for a bit over $100 US which consists of
> the
> > receiver, and antena, a couple of DB-9 serial cables ... what else do
you
> > need? A Stamp and a display... all set... :-)
> >
> >
Original Message
> > From: "Wayne Fulcher" <wayne@d...>
> > To: "Basic Stamp" <basicstamps@yahoogroups.com>
> > Sent: Thursday, February 01, 2001 12:15 PM
> > Subject: [noparse][[/noparse]basicstamps] GPS interface
> >
> >
> > > I would like to know if anyone has ever interfaced a GPS device to a
> BS2.
> > > If so could you give me some specifics as to the model GPS and where
to
> > get
> > > one and some direction as to how to build the interface.
> > >
> > > Thanks,
> > >
> > > Wayne Fulcher
> > > wayne@d...
> > >
> > >
> > >
> > >
> >
> >
> >
> >
>
>
>
>
>
I think that using SERIN with the available modifiers should do the job with
only one (complicated !) line of code.
regards
ECO
Original Message
From: "dakota" <rfriedrich@a...>
To: <basicstamps@yahoogroups.com>
Sent: vendredi 2 f
need to use lookup/down to convert an ascii number to a number-
number.. :-)
Since the ASCII digits 0-9 are contiguous (Hex 30-39)
A loop like...
num = 0
loop1:
call getchar
if char = '.' then fractionalpart
num = (num * 10) + (char - 48) '48 dec is hex 30
goto loop1
fractionalpart:
fraction = 0
loop2:
call getchar
fraction = (fraction + (char - 48)) / 10
goto loop2
I've left out a couple of things, like knowing when to stop looping...
and since the stamps only do integer arithmetic, the divisioan by 10
doesn't really work the way you want.... BUT... since the factional
part is fixed... you can treat it as a separate integer...
Anyway.. just some ideas... the point being converting an ascii
string to a number isn't that difficult... :-)
Cheers,
Don
--- In basicstamps@y..., "Don Russell" <drussel2@s...> wrote:
> The garmin GPS25 sensor seems to have fixed length fields (the
long/lat
> fields all contain leading zero characters as needed)... and as for
> converting the ascii text to numbers.... the stamp LOOKDOWN or
(LOOKUP?)
> command would work.... should only take a few lines of code
>
> Even with variable length fields, the garmin terminates each field
with a
> comma, and the whole sentence with <CR><LF>
>
>
Original Message
> From: "dakota" <rfriedrich@a...>
> To: <basicstamps@y...>
> Sent: Friday, February 02, 2001 6:54 AM
> Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
>
>
> > yes easy to parse but converting the characters into numbers is
> non-trivial
> > chore - seems like it took me about a page of code to do that (my
gps had
> > non fixed length fields).
> >
> >
> > richard
> >
> >
> >
Original Message
> > From: "Don Russell" <drussel2@s...>
> > To: <basicstamps@y...>
> > Sent: Thursday, February 01, 2001 7:17 PM
> > Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> >
> >
> > > Have a look at te garmin (www.garmin.com) OEM sensors...
there's one
> that
> > > has a serial interface that would be a breeze to connect with a
stamp
> and
> > an
> > > LCD display.
> > >
> > > The sensor sends NMEA 0183 format "sentences" which are very
simple to
> > > parse. If you go to the garmin web site download
their "specifications"
> > and
> > > it shows all the message formats etc.
> > >
> > > I'm thinking of doing this myself... but I'm on a shoestring
budget
> right
> > > now. :-)
> > >
> > > You can get an "evaluation kit" for a bit over $100 US which
consists of
> > the
> > > receiver, and antena, a couple of DB-9 serial cables ... what
else do
> you
> > > need? A Stamp and a display... all set... :-)
> > >
> > >
Original Message
> > > From: "Wayne Fulcher" <wayne@d...>
> > > To: "Basic Stamp" <basicstamps@y...>
> > > Sent: Thursday, February 01, 2001 12:15 PM
> > > Subject: [noparse][[/noparse]basicstamps] GPS interface
> > >
> > >
> > > > I would like to know if anyone has ever interfaced a GPS
device to a
> > BS2.
> > > > If so could you give me some specifics as to the model GPS
and where
> to
> > > get
> > > > one and some direction as to how to build the interface.
> > > >
> > > > Thanks,
> > > >
> > > > Wayne Fulcher
> > > > wayne@d...
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
code and add on some house keeping chores and you get up to about the page
length I talked about
this is essentially the way I did it. I was just a little ticked that there
wasnt already a predefined function to do this. basic from 25 years ago did
it - I was just ticked that it wasnt included - I use basicx-24 and the
floating point math is wonderful.
richard
is your address san antonio ?
I am in austin
richard
Original Message
From: <drussel2@s...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, February 02, 2001 12:04 PM
Subject: [noparse][[/noparse]basicstamps] Re: GPS interface
> Thinking about this on my drive to work I thought... Hey, theres no
> need to use lookup/down to convert an ascii number to a number-
> number.. :-)
>
> Since the ASCII digits 0-9 are contiguous (Hex 30-39)
>
> A loop like...
> num = 0
> loop1:
> call getchar
> if char = '.' then fractionalpart
> num = (num * 10) + (char - 48) '48 dec is hex 30
> goto loop1
>
> fractionalpart:
> fraction = 0
> loop2:
> call getchar
> fraction = (fraction + (char - 48)) / 10
> goto loop2
>
> I've left out a couple of things, like knowing when to stop looping...
> and since the stamps only do integer arithmetic, the divisioan by 10
> doesn't really work the way you want.... BUT... since the factional
> part is fixed... you can treat it as a separate integer...
>
> Anyway.. just some ideas... the point being converting an ascii
> string to a number isn't that difficult... :-)
>
> Cheers,
> Don
>
>
> --- In basicstamps@y..., "Don Russell" <drussel2@s...> wrote:
> > The garmin GPS25 sensor seems to have fixed length fields (the
> long/lat
> > fields all contain leading zero characters as needed)... and as for
> > converting the ascii text to numbers.... the stamp LOOKDOWN or
> (LOOKUP?)
> > command would work.... should only take a few lines of code
> >
> > Even with variable length fields, the garmin terminates each field
> with a
> > comma, and the whole sentence with <CR><LF>
> >
> >
Original Message
> > From: "dakota" <rfriedrich@a...>
> > To: <basicstamps@y...>
> > Sent: Friday, February 02, 2001 6:54 AM
> > Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> >
> >
> > > yes easy to parse but converting the characters into numbers is
> > non-trivial
> > > chore - seems like it took me about a page of code to do that (my
> gps had
> > > non fixed length fields).
> > >
> > >
> > > richard
> > >
> > >
> > >
Original Message
> > > From: "Don Russell" <drussel2@s...>
> > > To: <basicstamps@y...>
> > > Sent: Thursday, February 01, 2001 7:17 PM
> > > Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> > >
> > >
> > > > Have a look at te garmin (www.garmin.com) OEM sensors...
> there's one
> > that
> > > > has a serial interface that would be a breeze to connect with a
> stamp
> > and
> > > an
> > > > LCD display.
> > > >
> > > > The sensor sends NMEA 0183 format "sentences" which are very
> simple to
> > > > parse. If you go to the garmin web site download
> their "specifications"
> > > and
> > > > it shows all the message formats etc.
> > > >
> > > > I'm thinking of doing this myself... but I'm on a shoestring
> budget
> > right
> > > > now. :-)
> > > >
> > > > You can get an "evaluation kit" for a bit over $100 US which
> consists of
> > > the
> > > > receiver, and antena, a couple of DB-9 serial cables ... what
> else do
> > you
> > > > need? A Stamp and a display... all set... :-)
> > > >
> > > >
Original Message
> > > > From: "Wayne Fulcher" <wayne@d...>
> > > > To: "Basic Stamp" <basicstamps@y...>
> > > > Sent: Thursday, February 01, 2001 12:15 PM
> > > > Subject: [noparse][[/noparse]basicstamps] GPS interface
> > > >
> > > >
> > > > > I would like to know if anyone has ever interfaced a GPS
> device to a
> > > BS2.
> > > > > If so could you give me some specifics as to the model GPS
> and where
> > to
> > > > get
> > > > > one and some direction as to how to build the interface.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Wayne Fulcher
> > > > > wayne@d...
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
>
>
>
>
a string of ascii numbers to a number-number... hmmm, we could always
write to parallax... they seem pretty receptive from ym experience
with them so far.
Having to deal with the fractional parts is the pain... my code
sample below has the undesired effect of reversing the digits after
the decimal point. :-(
And.. to answer your geographic question.. :-) I'm in San Diego CA.
Regards,
Don
--- In basicstamps@y..., "dakota" <rfriedrich@a...> wrote:
> you are right, it is all that difficult, but is still non-trivial.
take this
> code and add on some house keeping chores and you get up to about
the page
> length I talked about
>
> this is essentially the way I did it. I was just a little ticked
that there
> wasnt already a predefined function to do this. basic from 25 years
ago did
> it - I was just ticked that it wasnt included - I use basicx-24
and the
> floating point math is wonderful.
>
> richard
>
> is your address san antonio ?
> I am in austin
>
> richard
>
>
>
>
>
Original Message
> From: <drussel2@s...>
> To: <basicstamps@y...>
> Sent: Friday, February 02, 2001 12:04 PM
> Subject: [noparse][[/noparse]basicstamps] Re: GPS interface
>
>
> > Thinking about this on my drive to work I thought... Hey, theres
no
> > need to use lookup/down to convert an ascii number to a number-
> > number.. :-)
> >
> > Since the ASCII digits 0-9 are contiguous (Hex 30-39)
> >
> > A loop like...
> > num = 0
> > loop1:
> > call getchar
> > if char = '.' then fractionalpart
> > num = (num * 10) + (char - 48) '48 dec is hex 30
> > goto loop1
> >
> > fractionalpart:
> > fraction = 0
> > loop2:
> > call getchar
> > fraction = (fraction + (char - 48)) / 10
> > goto loop2
> >
> > I've left out a couple of things, like knowing when to stop
looping...
> > and since the stamps only do integer arithmetic, the divisioan by
10
> > doesn't really work the way you want.... BUT... since the
factional
> > part is fixed... you can treat it as a separate integer...
> >
> > Anyway.. just some ideas... the point being converting an ascii
> > string to a number isn't that difficult... :-)
> >
> > Cheers,
> > Don
> >
> >
> > --- In basicstamps@y..., "Don Russell" <drussel2@s...> wrote:
> > > The garmin GPS25 sensor seems to have fixed length fields (the
> > long/lat
> > > fields all contain leading zero characters as needed)... and as
for
> > > converting the ascii text to numbers.... the stamp LOOKDOWN or
> > (LOOKUP?)
> > > command would work.... should only take a few lines of code
> > >
> > > Even with variable length fields, the garmin terminates each
field
> > with a
> > > comma, and the whole sentence with <CR><LF>
> > >
> > >
Original Message
> > > From: "dakota" <rfriedrich@a...>
> > > To: <basicstamps@y...>
> > > Sent: Friday, February 02, 2001 6:54 AM
> > > Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> > >
> > >
> > > > yes easy to parse but converting the characters into numbers
is
> > > non-trivial
> > > > chore - seems like it took me about a page of code to do that
(my
> > gps had
> > > > non fixed length fields).
> > > >
> > > >
> > > > richard
> > > >
> > > >
> > > >
Original Message
> > > > From: "Don Russell" <drussel2@s...>
> > > > To: <basicstamps@y...>
> > > > Sent: Thursday, February 01, 2001 7:17 PM
> > > > Subject: Re: [noparse][[/noparse]basicstamps] GPS interface
> > > >
> > > >
> > > > > Have a look at te garmin (www.garmin.com) OEM sensors...
> > there's one
> > > that
> > > > > has a serial interface that would be a breeze to connect
with a
> > stamp
> > > and
> > > > an
> > > > > LCD display.
> > > > >
> > > > > The sensor sends NMEA 0183 format "sentences" which are very
> > simple to
> > > > > parse. If you go to the garmin web site download
> > their "specifications"
> > > > and
> > > > > it shows all the message formats etc.
> > > > >
> > > > > I'm thinking of doing this myself... but I'm on a shoestring
> > budget
> > > right
> > > > > now. :-)
> > > > >
> > > > > You can get an "evaluation kit" for a bit over $100 US which
> > consists of
> > > > the
> > > > > receiver, and antena, a couple of DB-9 serial cables ...
what
> > else do
> > > you
> > > > > need? A Stamp and a display... all set... :-)
> > > > >
> > > > >
Original Message
> > > > > From: "Wayne Fulcher" <wayne@d...>
> > > > > To: "Basic Stamp" <basicstamps@y...>
> > > > > Sent: Thursday, February 01, 2001 12:15 PM
> > > > > Subject: [noparse][[/noparse]basicstamps] GPS interface
> > > > >
> > > > >
> > > > > > I would like to know if anyone has ever interfaced a GPS
> > device to a
> > > > BS2.
> > > > > > If so could you give me some specifics as to the model GPS
> > and where
> > > to
> > > > > get
> > > > > > one and some direction as to how to build the interface.
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Wayne Fulcher
> > > > > > wayne@d...
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> >
> >
> >
> >
drussel2@san.rr.com writes:
a string of ascii numbers to a number-number... hmmm, we could always
write to parallax... they seem pretty receptive from ym experience
with them so far.
The SERIN modifier DEC will take an ASCII string and convert it to a decimal
number. ·The HEX modifier will convert hexadecimal string to decimal. ·Just
make sure your receiver variable is big enough for the number you expect to
receive.
-- Jon Williams
-- Dallas, TX[/font]
and it automagically stops when a nondigit occurs, so it should be fairly straightforward to get the integer and the fractional parts as two separate numbers.
Thanks for the reminder! :-)
Don Russell
Position? Let's see.. .I'm at the corner of "Walk" and "Don't Walk"
Original Message
From: jonwms@aol.com
To: basicstamps@yahoogroups.com
Sent: Friday, February 02, 2001 4:42 PM
Subject: Re: [noparse][[/noparse]basicstamps] Re: GPS interface
[font=arial,helvetica]In a message dated 2/2/01 5:26:24 PM Central Standard Time,
drussel2@san.rr.com writes:
a string of ascii numbers to a number-number... hmmm, we could always
write to parallax... they seem pretty receptive from ym experience
with them so far.
The SERIN modifier DEC will take an ASCII string and convert it to a decimal
number. ·The HEX modifier will convert hexadecimal string to decimal. ·Just
make sure your receiver variable is big enough for the number you expect to
receive.
-- Jon Williams
-- Dallas, TX [/font]
any guidance I can get on interfacing an NMEA
instrument to the BS2. I understand the newest
version of NMEA 0183 is essentially an RS-422 or
"differential drive" interface. I think I'm going to
need an opto-isolator for the receive line. I would
like to be able to buffer data (like an NMEA sentence
from a GPS) and possibly store GPS fixes in memory. I
would also like to be able to automatically route data
on one I/O line to another instrument or memory based
on the content or source (NMEA Talker) of the
sentence.
Thanks in advance for any assistance you can lend.
Best Regards
Steve
__________________________________________________
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was a GPS guided R/C truck. Check my website at
www.stoneflyers.com and hit GPS truck. There is
information there that you will find helpful. Email me
mklarich@s... if you have any questions or
just want to shoot the breeze.
Matt Klarich
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get a GSM module to send SMS messages to a mobile phone. thanks Gary D
This is how i read NMEA data from a GPS module:
GPSQuality var byte ' GPS quality indicator
TimeData var byte(4) ' UTC time data
LatitudeData var byte(4) ' latitude data
LongitudeData var byte(4) ' longitude data
AltitudeData var word ' altitude data
' GPSReadData - Reads NMEA data from the GPS module
'
GPSReadData: ' Set the default GPS data quality
GPSQuality = 0
' Get NMEA data from the GPS module...
SERIN 0,16572,2000,GPSReadDataFailed,[noparse][[/noparse]WAIT("$GPGGA"), SKIP 1, DEC2
TimeData(0), DEC2 TimeData(1), DEC2 TimeData(2), SKIP 1, DEC2 TimeData(3),
SKIP 2, DEC2 LatitudeData(0), DEC2 LatitudeData(1), SKIP 1, DEC2
LatitudeData(2), SKIP 3, LatitudeData(3), SKIP 1, DEC3 LongitudeData(0),
DEC2 LongitudeData(1), SKIP 1, DEC2 LongitudeData(2), SKIP 3,
LongitudeData(3), SKIP 1, DEC1 GPSQuality, SKIP 8, DEC AltitudeData]
GPSReadDataFailed: RETURN
If valid GPS data is received then the value of the GPSQuality variable will
be non-zero.
I hope this helps. We can also supply you with a GSM modem. Please visit our
website at http://www.warburtech.com for more information. Feel free to
email me at russell@w... if you have any more questions. I look
forward to hearing from you.
Best regards,
Russell Warburton
email: russell@w...
website: http://www.warburtech.com
telephone: +44 (0)7814 044 754
Original Message
From: "Gary Denison" <gdii@c...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, May 03, 2002 11:08 PM
Subject: [noparse][[/noparse]basicstamps] GPS interface
> Deos anyone know the commands to interface a GPS using NMEA? also where to
> get a GSM module to send SMS messages to a mobile phone. thanks Gary D
>
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standard GPS unit using NMEA0183 output strings take a look at the
article "Where in the World is my BASIC Stamp" in the Nuts & Volts
section of Parallax downloads. For those of you that use the Garmin
eTrex (as we do at Parallax) my November column (Nuts & Volts) shows how
to use the text output which is twice as fast as the NMEA output and
uses fixed-width fields so it's easier to parse data.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: Gary Denison [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=yiJK7NX1k-McDN2L6NKH9zp-PaMjm7Kfv8mY9ZrgCZCrds0DmfMbBXRFeZhsv3jxfQxe]gdii@c...[/url
Sent: Friday, May 03, 2002 5:09 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] GPS interface
Deos anyone know the commands to interface a GPS using NMEA? also where
to get a GSM module to send SMS messages to a mobile phone. thanks Gary
D
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