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Special Forums Hardware Serial connection CAT5 instead of RS232 and Null Modem or Straight cable. Post 302549485 by jgt on Tuesday 23rd of August 2011 07:05:28 AM
Old 08-23-2011
rs232 pinout - Google Search

You only need to connect three wires, pin 2 (red) , 3(green) and 7(black) on the 25 pin end.
On the 9 pin end connect pins 2(red),3(green), and 5(black).
Set the terminal to use xon-xoff flow control.
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GPIOCTL(1)						    BSD General Commands Manual 						GPIOCTL(1)

NAME
gpioctl -- GPIO control utility SYNOPSIS
gpioctl -l [-f ctldev] [-v] gpioctl -t [-f ctldev] pin gpioctl -c [-f ctldev] pin flag [flag ...] gpioctl [-f ctldev] pin [0|1] DESCRIPTION
The gpioctl utility could be used to manage GPIO pins from userland and list available pins. The options are as follows: -c pin flag [flag ...] Configure pin by setting provided flags. The following flags are currently defined: IN Input pin OUT Output pin OD Open drain pin PP Push pull pin TS Tristate pin PU Pull-up pin PD Pull-down pin II Inverted input pin IO Inverted output pin -f ctldev GPIO controller device to use If not specified, defaults to /dev/gpioc0 -l list available pins -t pin toggle value of provided pin number -v be verbose: for each listed pin print current configuration EXAMPLES
o List pins available on GPIO controller defined by device /dev/gpioc0 gpioctl -f /dev/gpioc0 -l o Set the value of pin 12 to 1 gpioctl -f /dev/gpioc0 12 1 o Configure pin 12 to be input pin gpioctl -f /dev/gpioc0 -c 12 IN SEE ALSO
gpio(4), gpioiic(4), gpioled(4) HISTORY
The gpioctl utility appeared in FreeBSD 9.0. AUTHORS
The gpioctl utility and this manual page were written by Oleksandr Tymoshenko <gonzo@freebsd.org>. BSD
November 7, 2013 BSD
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