[aprssig] "Controlling" things with APRS

Bob Bruninga bruninga at usna.edu
Thu Jul 12 21:14:05 EDT 2012

I think the Tinytrack 4 implements the original APRSdos remote control messaging feature.  Send a message with the command to set any of the 8 bits on the output port.


---- Original message ----
>Date: Fri, 13 Jul 2012 00:50:22 +0000
>From: aprssig-bounces at tapr.org (on behalf of Stephen - K1LNX <k1lnx at k1lnx.net>)
>Subject: [aprssig] "Controlling" things with APRS  
>To: "aprssig at tapr.org" <aprssig at tapr.org>
>Hopefully I can explain this well enough to where it makes sense, so
>here goes...
>I have a KPC-3+ in digi mode and I have been looking at the telemetry
>options as well as the control outputs available. I have seen the "CTRL"
>option in the KPC-3 manual, but I would like to take this further. I
>would like the ability to send a specially crafted APRS packet/message
>to my TNC and have the "CTRL" on or off accordingly. Security is the
>first thing that comes to mind as anyone watching the on-air activity
>could easily duplicate the packet as well. There's always the remote
>control option as well, but I like the idea of sending a single packet
>that I could pre-program in an HT for example to simply switch something
>on or off.
>My intent of this usage is that I have a repeater with GPIO pins that I
>can toggle to do various things, one of them being disabling the
>repeater, or changing the channel wtc. I don't know that the KPC-3+ is
>capable of doing this? Can it receive a packet and say, act on it
>Is anyone actively doing what I describe above, or am I trying to
>re-invent the wheel? In summation, I would love the ability to send a
>single APRS packet to my TNC and have it switch something "on" or "off"
>(high or low respectively)
>73 and thanks for any insight,
>aprssig mailing list
>aprssig at tapr.org

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