Verify what I think (No neutral for a light switch)

[JDRoberts]

Yes, unfortunately, that switch will not work for you.

There is one very good option that does not require a neutral wire and now has an official integration with Smartthings: the Lutron Caseta line. Most of their models do not require a neutral wire. You will however, have to get a Lutron SmartBridge (one SmartBridge can support about 40 individual switches) in order to make the integration work. But these are very well engineered switches, easy to install, and very quick. I use them in my own house.

https://support.smartthings.com/hc/en-us/articles/115000864766-How-to-connect-Lutron-Caséta-devices

https://www.amazon.com/LUTRON-P-BDG-PKG1W-Wireless-Lighting-Starter/dp/B00MXCRAX8

There are a couple of other options you can look at, but the Lutron will be the simplest.

Dimmers/Switches that don't need a common (neutral) wire? (2016)

I’m having a terrible time trying to get a three-way switch automated. While the rest of my switches in the house all have a common wire (and are easy to install the GE Z-Wave Dimmer) our Kitchen overhead recessed lights have the simple tap side “cheaped out” with no common wire available. Having an electrician run such a wire through our attic will be $$$$. When I started with Insteon most of their stuff required a common wire but for situations in older homes or where the wiring was expedient (like this situation) they offered an RF Dimmer Switch that didn’t require it. I don’t suppose there’s anything anyone makes for SmartThings type Hubs that could also work without a common wire? It irks the hell out of me since this is a light I really need to automate (and be able to dim).

(Lutron is an engineering company focused on lighting and holds a number of patents on their devices, which is why they can do what nobody else can for several features.)