For external access to your hub (and other devices on your home network) that will work in majority of cases (power is on/internet access is available), a VPN is the best approach, and Tailscale (Google it) is a relatively simple and very secure/robust VPN option based on WireGuard, an industry leading VPN. Your router may also natively support a VPN that you can configure on it w/out any additional SW. If you're away from your house regularly, once you have a VPN you'll wonder how you lived w/out it.
Add to that a Wi-Fi plug that your hub is connected to and you can remotely force a shut down/reboot of your hub if you need to. That should not be very often...I cannot for the life of me remember the last time I had to do that w/any of my hubs...they don't lock up ever in my use of them. But I have each of them on the tiny 5V SonOff USB Wi-Fi plugs.
That'll do the job even on my battery setup. Will order. Thanks.
Is there a possibility of one that works for 12 volts for the modem/router?
I guess I could rig up a relay connected to the internet monitoring plug above somehow to interrupt the 12 volt feeds.
Yup - I have it set up Wall Wart plug > USB UPS > SonOff plug > Hub. Make sure you have the necessary collection of USB connectors to make it work. I like that the plug is tiny enough that it's up where the hub is so I can dork w/it if I need/want to w/out crawling around on the floor.
Getting it on your Wi-Fi network can be a bit of a one-time initial setup PITA. Other than that it's just worked. I control it w/the Ewelink app on my phone (when connected via VPN to my home network).
Other than being a bit of a pain to get on the network, the SonOff have worked perfectly for me, so can't imagine a "better" from that perspective. But easier to join to the network is a good thing if you can find it in an alternative.
The one i linked above does say somewhere in the packaging i got that it supports a range of voltages(5 to something), but I am not sure i would trust that. If i remember I will check when I get home in a few hours. It seems to use the Tuya backend and uses their app for control. I got the 3 pack and two of them are inline between my USB-C Battery Backup @dJOS put out and my hubs.
Main reason I tried that one is because it appears to use Tuya and pairing looked (and was) easy. It seems to have decent reviews with that not being the main complaint like the Sonoff one. I already had another tuya device so it is one less app to have invading my privacy on my phone.
Where are you at. Amazon is showing that being delivered to my location by Saturday.
That Splenssy one you linked is the same one I mentioned above. I didn't have any issues pairing it with the Tuya app. Maybe 5 min for both of them I paired. The pairing method is you plug it in. Hold the button down for 5 seconds until the light starts flashing. Then let the tuya app set it up.
Maybe i just got lucky, but it was a cake walk for me. The directions are in a really tiny font though..
Oops too late. Ordered the Sonoff.
I didn't click on your link above.
The Splenssy though, only had 11 reviews on Amazon, but you're actually saying it was easy to pair.
Oh well, here's hoping.
I think it was the free delivery.
You have to look close with Amazon.
based on that it should be able to take anywhere from 5-12 volts @2.5 amps in and then pass it through on the output. Again I would test this before i would put anything on it longterm, but it seems like it should work.
The Splenssy was very easy to pair using the TuyaSmart app. Once I figured that I had to turn Bluetooth on for the app, lol.
I didn't mess with the Sonoff. It'll be in my box of extra stuff-at least it's small.
Now I'd like to figure out a way to autonomously cycle the 12vdc power to the modem and router. I think that was discussed in another recent thread. I think a Zen17 could be involved for my 12vdc setup.
Speaking of autonomous, although I've never been at that point yet, I guess my hub could have some routines to reboot before it got into too much trouble.
I know this won't help many of you, but it may help a few and it may provide a thought to others.
I have a FrontPoint security system that isn't integrated with Hubitat. Connectivity with my FrontPoint (FP) hub is both via WiFi and cellular. The FP hub also has a Z-Wave radio. So, I have three switches connected to the FP hub and can control them from my phone (or the web).
Study - Hubitat Hub/16-port Switch/(4) Outside CAMs/(1) Inside CAM
Living Room - (1) Inside CAM
AV and LAN Equipment Closet - Modem/Router/LAN Controller/(4) APs via POE/(2) Managed Switches
So, If the Hubitat hub, any of the LAN hardware, or the internal or external cameras need to be rebooted, I can do it remotely - even if the internet is down. I also have a whole home generator with UPSs in the Equipment Closet, study, and on the FP hub, so I always have power.
TLDR; I can reboot the Hubitat Hub - and many other LAN devices and cameras, via the FP Hub's cellular/Z-Wave connectivity even without the internet.