From: Riley Williams (ihhv@compusonic.fi)
Date: Sun Mar 03 2002 - 17:45:49 EET
Hi Erik.
>>> Can predict be used as kct can to control an azimuth rotor ?.
>> It can send the relevant information to the serial port directly, or
>> could be used as a server with a fairly simple program controlling
>> the rotator as predict does almost all of the hard work.
> Can it only control a serial port, and not a parallel ??.
The code in PREDICT itself simply sends ASCII text down the specified
serial port, on the presumption that there's a dedicated microcontroller
at the far end that controls the rotator(s) accordingly. That's not what
you're likely to be talking about.
The PREDICT code can also sit on a network port and respond to network
connections from clients that are interested in either the details of
a particular satellite, or in predictions of where that satellite is
relative to the "Home QTH" programmed into PREDICT itself. It's in this
mode that it could be useful for your application, as a dedicated client
could just poll PREDICT for the current position of the specific
satellite and then move the rotator to point to it. By repeating that
loop, it could track any given satellite whilst it's available, and with
only a little more effort (primarily composed of only giving PREDICT
details of the satellites of interest), it could be made to auto-switch
from one satellite to another.
I've already written one PREDICT client. This one simply issues every
possible command to the predict port on the specified host and reports
the response received from the host, and is useful for debugging the
server code. It provides the bare bones of a text console (without
ncurses) based program to interact with the PREDICT server.
>> If you advise the requirements of the rotator in question, I'll see
>> what I can come up with.
> The rotor is the Yaesu G-1000SDX. Only azimuth control is required.
{Wry smile} Basically, what does it require to control that rotator as
far as the connections to your computer are concerned? I don't know
either the rotator in question or how you've connected it to your
computer, so you'll have to do the detective work for me.
Best wishes from Riley.
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