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[aprssig] Operator Present Bit

Wes Johnston, AI4PX wes at ai4px.com
Sat Sep 27 13:24:24 UTC 2008

I LIKE THIS IDEA!!!!  Of note, some older generation PIR sensors required
the lights to turn off, then they'd look for motion again.  So every xx
minutes, the lights would go out and you'd have to move.to make them come
back on.  The newer ones look for motion all the time and can reset the
timer whenever they see motion so the light never goes out.  Also, I once
stayed in a hotel room suite that had a PIR sensor in the corner of the room
that changed the a/c setpoint when the room was empty.  Problem is I sat at
the desk for 30 minutes w/o moving and the dogone a/c unit would shut off.
 I suppose this scenario is pretty unlikely in a busy EOC.
Lowes sells a PIR sensor that mounts in a single gang wallbox.
I've mounted this unit in the ceiling facing down of my parent's elevator to
turn on the elevator car light when you enter.  I can confirm that this type
will stay on continually as long as it sees motion in the area.  Perhaps
mounting a unit like this in the cieling tile of an EOC operator position
would seem ideal.

Our lives begin to end the day we become silent about things that matter

On Fri, Sep 26, 2008 at 1:23 AM, Stephen H. Smith <wa8lmf2 at aol.com> wrote:

> Mark Cheavens wrote:
> > Write an add-on that looks at the screen saver mode. (And/Or monitor
> > power saver).
> >
> > Have it change the overlay and send a beacon whenever the state of
> > the screen saver or power mode changes.
> >
> >
> >> Yes, for years we wanted to use the CASE of the N/S byte to
> >> indicate operator present.  But unitl someone re-wrote Uiview,
> >> we would never see their operator status.  So recently, we added
> >> the O OVERLAY idea.  But then again, if it is not automatic when
> >> the person enters the room and touches the PC and then decays
> >> off when the person leaves the operator position, then it is a
> >> worthless capablity.
> >>
> >>
> The problem with this is that I (and a lot of other users) have more
> than one computer in the operating area.  I always have the APRS PC
> running.   I may be within 3 feet of the APRS/Echolink/SSTV pc for hours
> on end (so that I would hear or see a message coming in) but I am
> interacting with (keyboarding or mousing) a completely different computer.
> Any operator status bit based on keyboard activity on the APRS PC would
> normally never get set.
> Just had an idea for a solution.
> Program a TinyTrak with the identical settings in the primary and
> secondary modes, except for the overlay symbol.  Set the beacon rate to
> once every 30 mins or so.   Connect the primary/secondary mode select
> switch to an IR motion sensor in the shack, and configure the sensor
> with a fairly long hang time -- perhaps 10 minutes when it is
> tripped.     Wire the TX audio and PTT of the TT in parallel with your
> main TNC or soundcard interface to the APRS radio (or use the mini-DIN
> input on a D700 or 710).
> As long as you are absent, the TT will beacon once every thirty minutes.
> Entering the room will trip the motion sensor to flip the TT to
> secondary mode. When it is switched, it re-initializes, immediately
> sends a beacon with the "Operator Present" overlay set and then starts
> the once-every-thirty-mins routine starting from that time. It will then
> continue to beacon "Operator Present" once every 30 mins as long as you
> hang around.  Leaving the room will reverse the process when the motion
> sensor times out and switches the TT back to the primary mode -- an
> immediate beacon without the "Operator Present" overlay, and then once
> every 30 mins.
> --
> Stephen H. Smith    wa8lmf (at) aol.com
> EchoLink Node:      14400    [Think bottom of the 2M band]
> Home Page:          http://wa8lmf.com  --OR--   http://wa8lmf.net
> World Digipeater Map
>  http://wa8lmf.net/APRSmaps
> JavAPRS Filter Port 14580 Guide
>  http://wa8lmf.net/aprs/JAVaprsFilters.htm
> "APRS 101"  Explanation of APRS Path Selection & Digipeating
>  http://wa8lmf.net/DigiPaths
> Updated "Rev H" APRS            http://wa8lmf.net/aprs
> Symbols Set for UI-View,
> UIpoint and APRSplus:
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