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elbug - simple c program for electronic morse key at the serial port
a simple c program for an serial elbug = electronic morse key.which is to be plugged to the serial port, its output is also a pin in the serial port.
Just compile it by 'gcc elbug.c -o elbug'
or use the ready-compiled file and copy elbug to user/local/bin.
/* Call it as root. */
How to cable your homebrew elbug?
Middle pad: +9V battery via Resistor 2k
Left contact: -> DCD
(9-pin plug: 1) (25-pin plug: 8)
Right contact: -> CTS
(9-pin plug: 8) (25-pin plug: 5) ...
This program plays/records audio from modem in 'raw modem' format and
extracts/acts on DLE-shielded codes such as DTMF, busy, etc. It was designed
as the 'key' piece of a bash-script based voicemail system.