That’s why I swear by Shelly modules. They’re small relays meant to be installed behind the original light switch and accept an input from it - this means you s

That’s why I swear by Shelly modules. They’re small relays meant to be installed behind the original light switch and accept an input from it - this means you still retain the functionality of the switch, but get network-based control as a bonus. Should the network go down, the physical switch still works and it’s acceptable for rentals because you don’t even have to remove them as they still behave like a normal switch if the controller is unavailable.