And that’s why IMHO they all need to be segregated in a VLAN with limited/no Internet access.

Never call yourself an idiot. Not a good IT engineer? (Just saying, I don’t know you) That doesn’t make you stupid at all.

Cool! I’ll try this. bout the garage door, I’d like to tell you how I do it: a car tracker (Teltonika FMB120 for about 45€), a small push button under the steering wheel, when I push it, it does a curl request to my Node Red instance that, based on the car location, opens the gate of my home, or office or parents. Bonus: the FMB120 can connect to the CAN bus and you can get some telemetry and you can also always locate your car (I use Traccar). It does need a data SIM card, but with 1NCE, you can get one that lasts 10 years and it only costs 10€ (not per month, not per year, for the whole 10 years.)