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expireddoublehelixx | Staff posted Sep 18, 2025 3:28 PM

TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter)

$15

$20

25% off
Amazon
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Deal Details
Amazon has TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter) for $14.61. Shipping is free w/ Prime or on $35+ orders.

B&H Photo Video has TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter) for $14.61. Shipping is free on $49+ orders, otherwise shipping costs will vary by location.

Alternatively TP-Link has TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter) for $14.99. Shipping is free on $49+ orders.

Thanks to Deal Hunter doublehelixx for sharing this deal.

Features:
  • Remotely Dim & Control Lights
  • Customizable Scheduling & Timers
  • Away Mode
  • 2.4 GHz Wi-Fi Connectivity
  • Tapo App for iOS & Android
  • Matter Compatible
  • Use with Amazon Alexa & Google Assistant
  • Use with SmartThings & Siri
  • Neutral Wire Required for Operation

Editor's Notes

Written by StrawMan86 | Staff

Original Post

Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter) for $14.61. Shipping is free w/ Prime or on $35+ orders.

B&H Photo Video has TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter) for $14.61. Shipping is free on $49+ orders, otherwise shipping costs will vary by location.

Alternatively TP-Link has TP-Link Tapo S505D Smart Wi-Fi Dimmer Light Switch & Dimmer (Matter) for $14.99. Shipping is free on $49+ orders.

Thanks to Deal Hunter doublehelixx for sharing this deal.

Features:
  • Remotely Dim & Control Lights
  • Customizable Scheduling & Timers
  • Away Mode
  • 2.4 GHz Wi-Fi Connectivity
  • Tapo App for iOS & Android
  • Matter Compatible
  • Use with Amazon Alexa & Google Assistant
  • Use with SmartThings & Siri
  • Neutral Wire Required for Operation

Editor's Notes

Written by StrawMan86 | Staff

Original Post

Community Voting

Deal Score
+34
Good Deal

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26 Comments

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Sep 18, 2025 4:49 PM
625 Comments
Joined Dec 2008
robertsmSep 18, 2025 4:49 PM
625 Comments

Our community has rated this post as helpful. If you agree, why not thank robertsm

FYI: Neutral wire required
2
1
Sep 18, 2025 5:35 PM
2.7K Comments
Joined Feb 2015
impasseSep 18, 2025 5:35 PM
2.7K Comments
the multi-packs are slightly cheaper per unit (and not time-limited like this lightning deal) Smilie
Sep 18, 2025 6:19 PM
1.5K Comments
Joined Dec 2005
PriceTheorySep 18, 2025 6:19 PM
1.5K Comments
This works on matter but still needs to communicate over WiFi, right?
Sep 18, 2025 6:44 PM
984 Comments
Joined Dec 2013
brian17834Sep 18, 2025 6:44 PM
984 Comments
Quote from PriceTheory :
This works on matter but still needs to communicate over WiFi, right?
Correct. In order to use the app to turn on/dim/off remotely.
1
Sep 18, 2025 7:29 PM
1.5K Comments
Joined Sep 2011

This comment has been rated as unhelpful by Slickdeals users.

Sep 18, 2025 7:39 PM
1.5K Comments
Joined Dec 2005
PriceTheorySep 18, 2025 7:39 PM
1.5K Comments
Quote from brian17834 :
Correct. In order to use the app to turn on/dim/off remotely.
Too bad--trying to avoid wifi for any IoT use cases.

Been happy with my Lutron Caseta (integrated into home assistant) but I admit that the price of additional hardware is hard to swallow. Especially the non-Dimmer and accessory switch (for 4-way switches) options which are still significantly more expensive than anything like this.

Matter might solve a lot of the 3rd party software/integration issues, but I guess you need Thread to get off wifi.
Sep 18, 2025 10:45 PM
691 Comments
Joined Jun 2011
zcsrsSep 18, 2025 10:45 PM
691 Comments
Quote from PriceTheory :
Too bad--trying to avoid wifi for any IoT use cases.

Been happy with my Lutron Caseta (integrated into home assistant) but I admit that the price of additional hardware is hard to swallow. Especially the non-Dimmer and accessory switch (for 4-way switches) options which are still significantly more expensive than anything like this.

Matter might solve a lot of the 3rd party software/integration issues, but I guess you need Thread to get off wifi.

What's the cons of wifi? Even the internet is down, on/off/dim can still be controlled with the physical switch, please correct me if I'm wrong.

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Sep 18, 2025 11:17 PM
1.7K Comments
Joined Aug 2007
SimMike777Sep 18, 2025 11:17 PM
1.7K Comments
It can be controlled with switch, but not as much dimming control as the app. I rarely use the smart feature. The big negative is this takes up a lot of space and is a tight squeeze in the light switch box. Plus the need for neutral wire, which my 1978 condo has.

I'm a big fan of Tapo/Kasa smart stuff. Works great with Alexa. Reliable and easy setup. I also have some Tapo cameras that don't require a subscription if you have microSD card.
Last edited by SimMike777 September 18, 2025 at 04:20 PM.
Sep 19, 2025 2:53 AM
703 Comments
Joined Dec 2012
thommanSep 19, 2025 2:53 AM
703 Comments
Agree with the size comment. It's the biggest smart switch I've seen. Having said that, these are rock solid on WiFi and integrates extremely well with Home Assistant for local (i.e not requiring Internet) smart control. I've replaced all my other brand switches with tplink's because of home assistant integration.
Sep 19, 2025 3:50 AM
430 Comments
Joined Dec 2024

This comment has been rated as unhelpful by Slickdeals users.

Sep 19, 2025 4:44 AM
2.2K Comments
Joined Aug 2014
fawziSep 19, 2025 4:44 AM
2.2K Comments
any switch that have a motion sensor + matter protocol
Sep 19, 2025 7:24 AM
691 Comments
Joined Jun 2011
zcsrsSep 19, 2025 7:24 AM
691 Comments
[QUOTE=MerryMeat6430;179130160]
Quote from zcsrs :
Quote from PriceTheory
:
Too bad--trying to avoid wifi for any IoT use cases.

Been happy with my Lutron Caseta (integrated into home assistant) but I admit that the price of additional hardware is hard to swallow. Especially the non-Dimmer and accessory switch (for 4-way switches) options which are still significantly more expensive than anything like this.

Matter might solve a lot of the 3rd party software/integration issues, but I guess you need Thread to get off wifi.

Edit: Here are the main cons of Wi-Fi dimmer light switches:
1. Reliability Issues

  • Wi-Fi drops can cause your lights to be unresponsive until the connection is restored.
  • Performance may degrade if your network is already crowded with many devices.
2. Latency

  • Turning lights on/off may have a small delay compared to a traditional mechanical switch.
  • If the cloud service is down (for app/voice control), you may lose remote functionality.
3. Security & Privacy

  • They rely on your Wi-Fi, so they can be targets for hacking if not updated or secured.
  • Some models require cloud accounts, which may raise data privacy concerns.
4. Installation Constraints

  • Most Wi-Fi dimmers require a neutral wire in the switch box, which older homes may not have.
  • LED compatibility can be tricky: some bulbs flicker or hum unless you pair them with dimmer-compatible LEDs.
5. Energy Use & Heat

  • They consume a small but constant amount of standby power (phantom load).
  • Some models generate heat when dimming, which can shorten lifespan if packed tightly.
6. Cost

  • Wi-Fi dimmers are more expensive than standard dimmers (often $25–$60 vs. $10–$15).
  • If you have many switches, the cost adds up quickly.
7. Ecosystem Lock-In

  • Some brands only work with certain apps, assistants (Alexa, Google, Apple Home), or cloud services.
  • If the company discontinues support, functionality may break.
Would you like me to compare Wi-Fi dimmers directly with Zigbee/Z-Wave dimmers too? Those have different trade-offs that might matter for your bus setup.
Answer by AI? Big Grin
1
Sep 19, 2025 11:30 AM
69 Comments
Joined Jun 2025
ExactOneSep 19, 2025 11:30 AM
69 Comments
Quote from zcsrs :
What's the cons of wifi? Even the internet is down, on/off/dim can still be controlled with the physical switch, please correct me if I'm wrong.
Not sure if they are referring to it being hacked
Sep 19, 2025 1:21 PM
1.1K Comments
Joined Apr 2009
espionagelfeSep 19, 2025 1:21 PM
1.1K Comments
My house is filled with all the original tplink kasa devices. What does this do differently and will my devices eventually stop working over wifi?

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Sep 19, 2025 3:00 PM
185 Comments
Joined Dec 2010
contactcrSep 19, 2025 3:00 PM
185 Comments
Quote from PriceTheory :
Too bad--trying to avoid wifi for any IoT use cases.

Been happy with my Lutron Caseta (integrated into home assistant) but I admit that the price of additional hardware is hard to swallow. Especially the non-Dimmer and accessory switch (for 4-way switches) options which are still significantly more expensive than anything like this.

Matter might solve a lot of the 3rd party software/integration issues, but I guess you need Thread to get off wifi.
Agree with your assessment. Don't forget if you have extra Pico Remotes (from buying kits or something) you can always use those in place of accessory switches. Follow the directions but essentially you are just using a wire nut to make the other switches "always on" and put the wireless remote in place of the switch.

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