                         README for RCM Version 2.0

                      (c) 2004 by Bernd-Ludwig Wenning

                        mailto:bernd-ludwig@b-l-w.de
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1. General information

RCM is a program to momentarily switch a relay connected to a serial port of a
Windows PC. The exact description of the relay hardware setup can be found at
the author's website (http://www.b-l-w.de). This program can use the DTR or
RTS line of the serial port for the relay control.


2. System requirements

This software is supposed to be able to run on any 32bit Windows, that means
Windows95, NT4.0 or any newer version. Further, there are no special hardware
requirements - except for the existence of a serial port, of course.


3. Installation

This software does not require any installation procedure.


4. Operation instructions

The use of this software is simple: Starting the software switches the relay
on, after the specified number of milliseconds off again and terminates the
program. There is normally no output on the screen.
There are up to three command line options: The first is to specify the port
where the relay is attached, the second one for the number of milliseconds
between "On" and "Off", the third one to specify if the relay is connected to
the DTR or the RTS line. Default values are COM1, 250 and DTR.
Some examples:
rcm2                                250 ms on DTR line of COM1
rcm2 COM3                           250 ms on DTR line of COM3
rcm2 COM1 2000                     2000 ms on DTR line of COM1
rcm2 COM2 1500 RTS                 1500 ms on RTS line of COM2


5. Changes to version 1.1

- Heavily optimized size of executable
- Completely removed screen output in normal operation
- RTS line support
- GPL license
