@Jay89 Your plan should work. I've read or watched a video somewhere where that was a solution. You'll just wanna cover up the 4 way spot with a blank plate. 

Please critique my plan.

I have a 4-way foyer light. One switch is upstairs and two switches are on the first floor not too far from each other. I use Alexa voice commands for controlling my lights including temperature and brightness. I really don't need two switches on the ground floor.

My plan is to remove the 4-way switch by connecting it's two black wires together and the red wires together. This is in essence converting 3 switches to two switches. I do not see any reason why it would not work. Further, I can identify 4-way switch by looking at how many wires connect to the switch. If it has 4 wires connected to it (not including ground) it is the 4-way switch that I should remove. 

Please let me know if my plan will work.

Thanks,

Jay

  @board4mic I followed this with 4 switches.  I have 2 3 ways on the ends, and 2 4 ways in the middle.   Power and load each on separate 3 way.   I put smart dimmer kit (230) on each end.   Those work fine.   If I flip a dumb 4 way it says there is a wiring issue and shuts down the smart switches.   Any thoughts?

  @judetf How do you get all three to add to the app and work as one switch? I haven't used the v1 version but the v2 version just connected as a pair. I've ordered 2 v1 kits in anticipation I can get this working. 

  @Indecision I'm curious did you get the V1 dimmer switches to work? Also how do you add all three switches to the app? When I set up just a normal three way it detected the pair and was done. Does the third one just add to it?

  @septer012 3-way switch works fine at either end of a circuit. A 4-way switch is needed for any in-between switches in the "chain" if you want them to all match. I want mine to all match (plus the little round "nightlight" option in the off state is a nice feature) so I wish Kasa would release a 4-way switch. Kasa, you KNOW such a product would sell, so MAKE IT.

The Kasa HS210 setup SUCKS, due to.....LACK OF INSTRUCTIONS. Plus the cruddy app fails fails fails. Half the time it doesn't detect the device, the other half of the time it won't let me name it ("Operation failed, please try again later"). And these are allegedly "smart" switches? Says who?!?? I call them DUMB switches.

Four or five years of community requests and still no product. This is starting to make me think TP Link doesn't want to support the demand of the community and I should consider a different brand. I'd be purchasing a handful today if you had a product.

If you don't want to make a 4 way product, how about an affordable middle switch to control the master? In other words, we'll wire as a 3 way with a middle switch that controls the function of the first including dimmer. This isn't a complicated solution but I do not believe smart actions allows the control of dimming. It essentially just needs another satellite that can communicate over Wifi.

  @MrShizzle 

This works for me with HS210 and one 4-way switch. Only difference with the schematics that everyone had posted is that the neutral wire of the hs210 of each ends is connected to the neutral line and to the light.