I'd like to replace my legacy wired system with konnected hardware. I happen to also have a SmartThings hub, however using the hub is not optimal because I'd like the system to work during power outages. That is hard to do with the SmartThings hub. I cannot run wires between the alarm and the hub, so then I would need two battery-powered UPSs: one for the hub, the cable modem, and the WiFi AP; and another for the Konnected hardware. Hub+modem+AP are fairly power-hungry. Also I don't know if the cable ISP will keep working during an outage.
The alternative would be to connect the Konnected to a dedicated WiFi-LTE hotspot using an old cell phone and a Google Fi data-only SIM. I expected the data usage of the Konnected system to be very low. If I do this, I wonder if there's any service and software that supports it. At the very least I will need a dynamic DNS, but it would be nicer to have a full-fledged service with notifications (when the alarm is triggered, or for other events) and the ability to turn the alarm on and off.
A 1/2-way solution would be to get a second SmartThings hub and connect that to the phone. I haven't tried, but I imagine that SmartThings supports multiple hubs. In the worst case I can pretend they are multiple houses. That would not be too hard, but I still need to power the hub during outages.
Does anybody have suggestions for this? Thanks!