"Jack Erbes" wrote in message
...
Sounds like you're using the right connections then. NMEA is RS-232 by
definition.

Wrong. NMEA is RS-422 by definition. And if everyone would have adhered to
that standard, we wouldn't have so many problems with intermixing RS-422 and
RS-232 devices. Every NMEA device should have an output labeled Out A and
Out B and an input named In A and In B. NMEA standard, chapter 3. But it was
the manufacturers who made a mess of it.
Take a look at www.shipmodul.com/en/connections.html for primer on NMEA
connections.

Meindert

Meindert Sprang wrote:
"Jack Erbes" wrote in message
...

Sounds like you're using the right connections then. NMEA is RS-232 by
definition.


Wrong. NMEA is RS-422 by definition. snip

Oops. I think I meant to say it was serial by definition. Thanks for
clarifying that.

Jack

--
Jack Erbes in Ellsworth, Maine, USA - jackerbes at adelphia dot net
(also receiving email at jacker at midmaine.com)

"Jack Erbes" wrote in message
...
Meindert Sprang wrote:
Wrong. NMEA is RS-422 by definition. snip

Oops. I think I meant to say it was serial by definition. Thanks for
clarifying that.

Ah, easy slip of the mind, serial, RS-232, all sounds the same :-)

Meindert

"Meindert Sprang" wrote in
:

we wouldn't have so many problems

Actually, too bad NMEA didn't look ahead and use RS-485 as the standard. I
supports 32 talkers and 32 listeners on a single line.....

Er, ah, of course we wouldn't need to buy Meindert's MULTIPLEXERs under RS-
485. 32 talkers is plenty for most boats.....(c;

"Larry W4CSC" wrote in message
...
"Meindert Sprang" wrote in
:

we wouldn't have so many problems

Actually, too bad NMEA didn't look ahead and use RS-485 as the standard.
I
supports 32 talkers and 32 listeners on a single line.....

Er, ah, of course we wouldn't need to buy Meindert's MULTIPLEXERs under
RS-
485. 32 talkers is plenty for most boats.....(c;

:-)

Meindert