[Elecraft] Fool proof kill switch = deadman timer?

[Michael Walker]

I have a RPI that monitors for open IP ports to Google and CNN.

If they are both gone, then I power cycle the modem.  It checks every 15
minutes.

You could also have the PI do anything you like on other GPIO ports like
kill a TX line or a power line to the radio.

AKA, if no internet, then do a full shutdown of things.  Just add relays as
required.

It is discussed here:
https://community.flexradio.com/flexradio/topics/remote-operation-modem-rebooting
 (sorry for the Flex thing, but that is what drove me to do it)

Mike va3mw


On Mon, May 29, 2017 at 1:07 PM, Michael Adams <mda at n1en.org> wrote:

> I have my cable modem and router on a UPS.
>
> However, I parsed the initial request as something different: even with my
> UPS, sometimes my cable modem connection drops; and sometimes my router
> gets wonky for unknown reasons, and a reset is required to clear the
> situation.
>
> An ideal kill switch would be able to test for connectivity (to the
> network at large, if not to the remote session specifically), and trigger
> if it's lost and not-reestablished in a timely manner.
> --
> Michael Adams | mda at n1en.org
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