All:
This is still not going well.
I have tried 3 different computers, 2 running Win7 and one running XP.
the XP machine successfully controls an Icom radio on the same port, so
I know the port is good. I have tried a new serial cable. I have tried
with and without a null modem.
No matter what I do, Lady Heather reports no serial communications on
comm/x.
/Thanks & 73,
Jim
[email protected]
/
/
On 7/6/2013 10:44 AM, Ed Palmer wrote:
Certainly if you need a full implementation with various control leads
you might have to dig out the breakout box and figure it out. But the
volts / no volts idea is still useful for connecting pairs like
RTS/CTS or DSR/DTR. But I'm surprised how many devices don't use the
control leads. Most of the devices I work with don't even use
software flow control.
Ed
On 7/5/2013 10:06 PM, Chris Albertson wrote:
On Fri, Jul 5, 2013 at 7:03 PM, Ed Palmer <[email protected]> wrote:
I always cursed when I tried to figure out how to wire an RS232 cable
until I realized that transmit had a voltage on it while receive was
close
to zero volts. So now I just remember that volts on one end
connects to no
volts on the other end. Works every time and I don't have to think
about
straight or cross-over.
That only works if there are only three wiresand no handshaking.
What if
there is DTE/DCE and so on?
But I think in this case it is just a three wire connection but still
there
is room for errors like for example is one of them a TTL level and the
other RS-232. Some times you can mix the two, sometimes not.
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