New to HA so apologies in advance for silly questions

[JDRoberts]

Start with post 11 in the range FAQ, then go up to the top and read the whole thread. It should clear up some of the range questions.

A Guide to Wireless Range & Repeaters

One more thought. While I understand the marketing reasons for the decision, the fact that SmartThings gives customers zero guidance on how to set up a network backbone does lead to a lot of frustration that shouldn’t have to exist. if people knew that .1) The hub should be located centrally in the home, both vertically and horizontally. Don’t put it in a garage or basement as those have concrete and pipes and metal objects which will reduce signal. If your Internet router is off in some inaccessible corner, you can use a Wi-Fi access point that has a ethernet port on the side and plug into that. Also, the hub should not be put in a cabinet. You just want to make it as easy as possible for signal to spread around your house. .2) you need one device that can repeat about every 40 feet…