@j404 That's what I did for both my kitchen and hallway lights. I'm using Lutron Skylark SCL-153P dimmer with the 3 way tp-link. 

@KazaUser  Yes, this kind of works, there is some delay (I've seen 2 seconds) as the slave switch just sends its state to the cloud, that is the "Smart Action".  The slave switch in this case may as well simply be an HS-200, as dimming is not possible.  Would be best if Kasa just made a cheaper product to do this, should be cheaper as it doesn't need the power MOSFETs to dim or switch anything.

So, to wire this up you need:

1. HS-200 - slave switch, replaces one 3 way switch
2. HS-220 - master switch, replaces the dimmer 3 way switch

Easiest to put master switch on the side with the load wire.  If needed you can use one of the travelers to send power to the other switch box where the slave switch is placed, otherwise you just wire-nut off the travelers, you don't need them.  The load side of the slave switch connects to nothing.

The whole notion of a 3-way switch is quaint in the era of home automation.

@Carl would totally beta test 10 of these if you need some reviews. Been itching to pull the trigger on other brands but have been holding out because I love my existing Tp-link switches. 

Carl wrote 

I don't know if we are going to do a beta on it but there will be a form attached to a banner added later today that you can fill out and if selected they will add you to the beta tester pool.

 

 

 

@Carl Was the form attached?  I looked at all of the headers and I couldn't find it.

Announcement during CES 2021.  Official product page, FWIW:  https://www.tp-link.com/us/home-networking/smart-switch/ks230-kit

Now, if anyone sees the "beta tester" program form/sign-up page, please let the rest of us know so we can join ASAP.  Thanks!

@Flubnut 

I sure hope they weren't waiting for ces to announce this. 🤣