Extender/Repeater Device Reconfigure?

A Repeater will be a good idea. It’s helpful to note that pretty much any mains powered Z wave devices will act as a repeater, including a plug in socket, A plug-in motion sensor, a light switch, etc.

There’s no reason to buy a single purpose repeater – – they don’t do anything more than the other devices do. They were helpful back during the third generation of Z wave when not all devices transmitted at maximum power, but these days you might as well just get a dual purpose device and get more for your money that way.

http://thingsthataresmart.wiki/index.php?title=Repeaters

Once you put the repeater where you want it to be, just run the zwave repair utility and any other devices will begin using it in a day or so. It can take a little while for all of the address tables to update, so be patient. :sunglasses:

https://support.smartthings.com/hc/en-us/articles/200981864-How-do-I-make-sure-my-Z-Wave-devices-are-routing-optimally-in-the-SmartThings-Classic-app-

You might also find the following FAQ of interest. First read post 11 in that thread, then go back up to the top and read the whole thing. ( this is clickable link)