7. Cwdaemon, a morse daemon for the parallel or serial port.

Cwdaemon is a small daemon which uses the pc parallel or serial port and a simple transistor switch to output morse code to a transmitter from a text message sent to it via the udp internet protocol.

Cwdaemon uses the PC speaker or your soundcard to generate a sidetone. The program is called as root, with "cwdaemon -p portnumber -s device". If no portnumber is given, the default portnumber 6789 is used. Device should be one of ttyS0, ttyS1, parport0 or parport1. Please read the README in the source package for information how to setup your parallel/serial port.

Parallel port circuitry to hook up your radio:

[parallel port circuit]

The parallel port circuitry has support for switching between microphone and soundcard (voice keyer) in ssb contests. You can also use it to switch between keyers or between micophones of 2 different transceivers. The bandswitch data pins are intended for switching antennas or filters.

Here is the serial port circuitry to hook up your radio (DB9 connector):

[serialport circuit]

Cwdaemon can be tested by installing the netcat package and type: "nc -u localhost 6789". Any character typed on the command line will be sent to cwdaemon.

You could also use the following shell script which is character based. 

#!/bin/sh

old_tty_settings=$(stty -g)
stty -icanon
trap 'stty "$old_tty_settings"; exit 0' INT

echo "Press (CTRL-C) to interrupt..."

while true; do
  nc -u localhost 6789
done

Cwdaemon is used by a number of linux programs:
URLDesciption
tlf by PA0R Trlog-like contest program
tucnak by OK1ZIA VHF contest logging program
kontesti by OH2MMY Finnish contesting program written in perl
qle by ZL2BSJ HF contest program written in Perl/Tk
tuxtest by DL4DZ HF contest program written with the help of gambas

Current cwdaemon version is 0.9.4. You will need at least unixcw version 2.3 to compile cwdaemon. See the source package for more information. Go here to download cwdaemon.