Question 1

Is it necessary to replace both switches in a 3-way circuit with smart wireless switches?

Accepted Answer

In response to DamanicGar asking about having a 4 way.  It shouldn’t make a difference.  When you have a 4 way , there is a 3 way wired before it on the line side and after it on the load side(light side).  You can have infinite amount of 4 ways in between the 2- 3 ways.  So your smart switch could go on the line side- power from the panel hits the switch, 2 traveler wires leave the 3 way and go to the 4 way, 2 traveler wires leave the 4 way and go to the last 3 way and then the load wire on the black terminal goes to the light.  ( neutral wires are just wirenutted through and not switched).   The smart switch can also go on the load side 3 way.  Having a 4 way in the middle doesn’t make a difference.  There is always power on the line side 3 way and there is always power at the load side 3 way( power alternates which traveler wire it is on depending on the position of the other switches).  All that to say, the smart switch would not even know that there is a 4 way even there. All the 4 way is doing is switching which traveler has power going to the load 3 way.

Question 2

Can the switches still be used manually--without Alexa or the Kasa app once set up?

Accepted Answer

Yes - you can simply press the physical switch on the device to manually turn the lights on or off.

Regards,
TP-Link Support

Question 3

can these use standard decora wall plates?

Accepted Answer

Yes, you can. I don’t know why people have had issues, but I have installed dozens of various Kasa switches and always use third party decorator plates. They have always sat flush against the sheet rock. If there is a gap, you are either not using flat headed screws to attach the switch, or it’s not installed all of the way.

Question 4

this comes with 2 switches.  Can i use this on 2 different sets of lights?  such as the front porch and the back porch independently of each other.

Accepted Answer

You ever get the one 3-way switch to work?  I tried and can't seem to get it to work with only 1 switch installed.  I have power and I when I switch the light off with my phone I can hear a click in the switch, but the lights do not turn on or off.  During the installation process the final steps walk through a process to pair the 2 switches.  I just "nexted" through the pairing steps.  Not sure if it not working because it is not paired with the other switch.

ASIN	B07724HNTX
Actuator Type	Toggle
Best Sellers Rank	#106,062 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #963 in Electrical Wall Switches
Brand Name	Kasa Smart
Circuit Type	3-way
Color	Original Version
Compatible Devices	Amazon Echo, Google Assistant, Smartphone (Kasa Smart app)
Connectivity Protocol	Wi-Fi
Connector Type	Plug In
Contact Material	Copper, Brass
Contact Type	Normally Open
Control Method	Voice
Control Type	remote, voice
Controller Type	Amazon Alexa
Current Rating	15 Amps
Customer Reviews	4.6 4.6 out of 5 stars (19,097)
Global Trade Identification Number	00845973083113
Included Components	Qty 2 - HS210, 2 Wall Plates, 4 Mounting Screws, 4 Wire Nuts, Quick Start Guide
International Protection Rating	IP54
Item Dimensions	13 x 7 x 16 centimeters
Item Type Name	TPL-HS210 KIT
Item Weight	0.22 Kilograms
Lower Temperature Rating	32 Degrees Fahrenheit
Manufacturer	TP-Link
Material Type	Polycarbonate
Model	HS210 KIT
Mounting Type	Wall Mount
Number of Items	1
Number of Positions	2
Operating Voltage	120 Volts
Operation Mode	ON-OFF-ON
Part Number	HS210 KIT
Specification Met	UL
Switch Type	Toggle
Terminal	Spst
UPC	845973083113
Unit Count	2 Count
Upper Temperature Rating	104 Degrees Fahrenheit
Wattage	1800 watts

Kasa Smart 3 Way Switch HS210 KIT, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch works with Alexa and Google Home, UL Certified, No Hub Required, White,2 Count (Pack of 1)

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