On Tue, 12 Apr 2005 22:42:15 +1200, Wout B
wrote:


"nm" wrote in message news

last sunday I tried to connect a laptop to the instrumentation of a boat
with a B&G Hydra 2000 system.
I downloaded a paper from b&g site:
http://www.bandg.com/pdfs/FAQs/faq007.pdf
where they use a cable named 135-0a-160
since i don't have such cable, i cut a serial cable and connected the
wires (according to the pins specified in the table) to the nmea
processor
i started several serial port sniffers (also one written by me), but, of
course, it didn't work
i tried to use only pins gnd, rx and tx, tried also to swap rx and tx,
but
still nothing
tried also on several different ports of the processor
my port sniffer sometimes reads strange characters, so I thougth that
the
cable referenced in the document may have some electronics inside, but I
couldn't find any useful info about that
anyone can help me out on this?
thanks
Nicola

Hi,
The fact that the control signals RTS and CTS are wired, suggests that
flow-control is used. Actually, from the wiring method they recommend not
'real' flow control, but to detect if the computer is present. Make sure
DTR at the computer side is on (pin 4) and is connected to pin 7 at the
Hercules 2000 side.
Instead, you can also try to connect RTS (8) and CTS(7) at the Hercules
side
and connect 4 to 8 (DTR and CTS) at the computer end.
There is no reason to connect pin 4 and 6 (DSR) unless your software
checks
DSR.
The baudrate setting is of course also important.
Wout



thanks for the reply
i'll check it out next time