[MCARC] Possible MYZ Tower Opportunity

[Nate Bargmann]

* On 2020 22 Aug 22:18 -0500, Ken Kopp - AKØA wrote:
> The way I have seen this done at another installation in the Topeka
> area is that the RPi at the site is set up with a script or cron job
> that reboots the RPi every morning at 2 or 3 AM and reconnects itself
> to the hub. That way the system behind the locked door automatically
> has a fresh start every day in case something flips a bit.

Even though it's remarkably stable a power bump can send things out into
la la land!  That may preclude cron from ever running and rebooting at
the proscribed time.  We've taken some short bumps over the past weeks
that have put a Pi 1B running Rune OS into la la land, but the Pi 4
running Allstar and the other Pi 1 running APRS seem to recover fine.

I was thinking more of a time delay relay of sorts that could be
triggered by one of the I/O ports on the CAT 200 controller.  A DTMF
command would cause the port to change state with a connected relay
interrupting the power to the Pi for 30 seconds or so.  Of course, this
requires a control op to be within range of the repeater.

Another option is a small UPS to run the Pi, but batteries do die at
some point...
 
> Even though we can work around not having a routable public IP, I
> think it would still be our first preference if at all possible.
> There's a lot Nate can do remotely via SSH if he needs to.

Even this latter part is not a big deal as the autossh package can be
used to easily set up a reverse SSH connection to the hub server so long
as an outbound connection exists from the site.

73, Nate

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

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