> Here is a sample of only one sentence from the GPS.

there are other sentences with other data.

S-Ident Z Time  uSEC    Latitude   Longit     Speed  Hdg D-M-Yr

Checksum

$GPRMC,144051.023550,A,3352.269,N,11823.157,W,0000.4,190,120593,,,*27

Here is a little real time test program to run. It checks if you

can

acess

the hardware clock and hardware timer directly.
There is both the QB source shown here and the compiled
version attached.

If it runs on Windows 95 in a DOS window on your notebook
then the ON COMM command should work as well.

Paul, Things may have gotten simpler as I realized I already had a

cable

that hooks to the PC serial port used to load database updates from

the

PC

to the Garmin.  I'll have to check it out to see if I can get the

NEMA

data

over it - it might not be wired right for that purpose.

Ed

You will eventually have to make a new cable with three wires as
the GPS should go on the end of the daisy chain loop.

TX(out) from PC, RX (in) mod 1, TX to mod 2, RX mod 2, TX to GPS RX

GPS TX

back to PC.

Paul Lamar

No problem, I have the another Garmin Power/Data cable and holder which

I

intended to install in the aircraft in any case.  So in this case, I

simple

plug it into the end of the daisy chain. I would intend to use a D9 plug

and

then wire a the opposite polarity plug onto the daisy chain - if that

turns

out to make sense.

Ed Anderson

It is so cool if we can relate cooling temps directly to performance
data. (Pardon the pun :-))

Paul Lamar

I agree, more meaningful to know the temps if you know the performance data.
Now I would think we should be able to back TAS out of the GPS data. If we
know the mag heading, mag variation and ground speed and track,  I would
think we could determine TAS. I'll have to look at the old wind trangle and
the GPS vectors.  Then if we capture rpm and air/fuel mixture and manifold
pressure and....  WAIT a minute! looks like to me we're backing into a full
data collection system {:>).

Let me fiddle with what you have sent and get back to you later today.

Ed

OK Ed. I have some friends coming in from Germany so will be entertaining
most of the rest of the day.

Paul Lamar

 
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