Trying to Connect a Relay Switch to a Light Fixture with Old Wiring

There are a number of battery operated buttons and switches that you could put on the wall. There are two which are specifically designed to fit over existing switches and are called “smart switch covers.” These are battery operated and have their own buttons. So they are very intuitive for guests and children. If your smart things hub goes off-line for maintenance, however, the switch on the wall won’t work because they work by having the smart switch cover talk to the hub and then hub would talk to the microswitch in the light fixture. You could remove the cover and get back to the switch underneath but it’s just something to be aware of. See the following thread for various options.

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