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

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.

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

Yes - you can simply press the physical switch on the device to manually turn the lights on or off. Regards, TP-Link Support

can these use standard decora wall plates?

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.

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.

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.

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Description

Illuminate Your Life, Effortlessly! 💡

REMOTE ACCESS - Control your lights from anywhere with the Kasa or Tapo app.
SEAMLESS SETUP - App-guided installation for effortless setup.
TRUSTED SAFETY - UL certified and backed by over 4 million satisfied users.
SMART SCHEDULING - Automate your lighting with customizable timers and 'away mode'.
VERSATILE CONTROL - Use as a 3-way or single pole switch for ultimate flexibility.

The Kasa Smart 3-Way Switch HS210 KIT is a versatile and user-friendly smart lighting solution that requires a neutral wire and operates on 2.4GHz Wi-Fi. Compatible with Alexa and Google Home, this UL certified switch allows for remote control, scheduling, and voice activation, making it a reliable choice for modern homes.

Specifications

Operation Mode	ON-OFF-ON
Current Rating	15 Amps
Operating Voltage	120 Volts
Contact Type	Normally Closed
Connector Type	Plug In
Brand	Kasa Smart
Terminal	Spst
Item Dimensions LxWxH	6.3 x 5.1 x 2.8 inches
Circuit Type	3-way, 1-way
Mounting Type	Wall Mount
Actuator Type	Push Button
Contact Material	Copper
International Protection Rating	IP54
Number of Positions	2
Lower Temperature Rating	32 Degrees Fahrenheit
Upper Temperature Rating	104 Degrees Fahrenheit
Controller Type	Google Assistant, vera, Amazon Alexa, Android
Control Method	Voice
Connectivity Protocol	Wi-Fi
Color	Original Version
Unit Count	2.0 Count
Number of Items	1
Manufacturer	TP-Link
Part Number	HS210 KIT
Item Weight	7.7 ounces
Product Dimensions	6.3 x 5.1 x 2.8 inches
Country of Origin	Vietnam
Item model number	HS210 KIT
Is Discontinued By Manufacturer	No
Size	2 Count (Pack of 1)
Style	3 Way
Pattern	Smart Switch
Shape	Rectangular
Voltage	110120 Volts
Item Package Quantity	1
Special Features	Dimmable
Included Components	Qty 2 - HS210, 2 Wall Plates, 4 Mounting Screws, 4 Wire Nuts, Quick Start Guide
Battery Cell Type	Lithium
Warranty Description	2 years

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