Does anyone have experience with using hardware watchdogs with Hive OS?  If so, what are your experiences with them?

I was looking at these:

https://www.ebay.com/itm/USB-Watchdog-Computer-Automatic-Restart-Blue-Screen-Mining-Game-Server-BTC-Miner/282777988573?epid=14011629036&hash=item41d6e1addd:g:vVkAAOSwY7taZBI2

It looks like they are supported: (well sort of)

http://forum.hiveos.farm/discussion/175/generic-watchdogs

Based on my limited time with Hive OS, my understanding is that the series of event goes like this:

1. Hashrate watchdog it triggered due to hashrate dropping below set-point
2. Miner restart initiated
3. If miner restart doesn't correct issue, reboot takes place
4. If reboot fails, then hardware watchdog attempts reset
5. If hardware reset fails, then hardware power cycle takes place

But if you have a frozen rig and #2 and #3 don't work, how is Hive OS going to "reach" the USB watchdog to perform either 4 or 5?

Maybe the above is not how it works, and instead the OS on the mining rig sends a keepalive signal to the USB watchdog, and when that fails, a hardware reset is attempted.  And failing that, a power reset is attempted.

Over the years, I have had computers lock up so hard that the only thing that would get them back, was to physically remove power and restore.  I guess a USB watchdog can't do that unless the output from the on-board power relay was driving a much larger external relay that can kill power to the rig.

I know with SMOS, SRR (SimpleRigResetter) is the way to go for hardware watchdog, which gets around the issue of using a USB dongle that might not be reachable if the rig is frozen.  But as far as I know, SSR does not work with Hive OS.   So I was curious what everyone is using with Hive OS.

Thanks!