TP-Link Tapo Matter Smart Dimmer Switch: Voice Control w/Siri, Alexa & Google Assistant, UL Certified, Timer & Schedule, Easy Guided Install, Neutral Wire Required, Single Pole, Tapo S505D

These worked great for my application - dimming undercabinet LED lights. I connected this to a 24V dimmable LED driver (B0CPLLMKHH) that supports triac dimming and fits in a single gang box. The driver was connected to 24V dimmable FCOB LEDs (B091KG5K1Q) that will be in some aluminum channel. No flicker, no noticeable delay and super easy setup. I already have several light switches from Tapo, but these were the first Matter ready ones, so I was surprised when I opened my phone and Google assistant was asking for the number or to scan the QR code. I scan the code, named the device and it was done. Then when I opened Tapo app, it too just wanted me to name the device and location. I will say that the Tapo app handles the dimming better in that as you are dragging the slider the lights dim live whereas in Google, you have to let go of the slider for it to actually send the value to the switch. I also tested the voice command and it worked as expected, so that is great too. The switches come with faceplates that have hidden fastners, which I like, however I don't use them anywhere else in the house, and these switches will get in a multi gang box, so they will end up in the trash, which is a shame. Overall, I'm very happy with my purchase.

I had started on my smart home journey many years ago and had initially used Belkin Wemo switches for my light fixtures. The Wemos never worked well, and I had switched them all out a number of years ago, replacing them with TP-Link Kasa switches, which have been trouble free and worked great with both Alexa and the Kasa app. I have 5 Kasa dimmer smart switches and I recently decided to add another one. In my search on Amazon I did find the Kasa switch but also saw that there was a newer model, which is this Tapo model. It looks to be the same as my Kasa switch, but also supported Matter. The Tapo switch looks and installs just like the older Kasa model. With installation, it's straight forward, but key is having the neutral wiring as not all homes have them. You will also need to be a distinguish between the line and load wires (not important in older switches), so having a non-contact voltage tester would be helpful. The hardest part of the installation is tucking away the wires to get the switch to fit inside the wall box. The snap on cover plate gives the switch a nice clean look. With the switch installed, the next step is adding it to the app. It does not work with the old Kasa app, but the good news for me was that the Tapo app will work with my older Kasa smart devices. I downloaded the Tapo app and signed in with my TP-Link account, and it immediately populated all of my Kasa devices. Adding this switch was easy, just clicking on the "+" button and selecting the product. It found it right away and only took a few minutes. I have always liked the Kasa app and the Tapo app looks to be even better, as it's intuitive, though I will need some time to try out the features. On my Alexa, I did unlink my Kasa skill and then linked the Tapo skill, though not sure if I really had to do that. Alexa found the Tapo switch right away and works as expected in controlling it. As Tapo supports Matter, I did also add it to Apple Home Kit. None of my older switches support Home Kit, so this is the only smart switch on Home Kit. To add to Home Kit, it just requires the QR code from the device, which I did not find in or on the box, so I initially thought it's probably on the back of the switch, which didn't make much sense to me. However, in looking at the device in the Tapo app, there was an option to show the QR code, so problem solved. Adding to Home Kit was also quick and easy once I had the QR code. I have over 2 dozen TP-Link smart devices in my home setup. All of them are in the Kasa line except for this new Tapo switch. I can attest to the quality of their devices and am happy that TP-Link is continuing to bring new functionality to their line.

I’ve installed multiple smart switches, and this TP-Link Tapo Matter Smart Dimmer was one of the easiest. Before shutting off the breaker, I removed the wall plate and used a multimeter to identify line and load. After cutting power, I labeled the wires using the included stickers, removed the old switch, and disconnected the pigtail ground from the existing ground bundle. The Tapo dimmer uses a long ground wire instead of a ground screw, which made installation straightforward. Everything fit back into the box cleanly. Setup in the Tapo app was quick and intuitive. Tap the plus icon, add a new device, and follow the prompts. One important tip: don’t skip calibration. I did initially, and the dimming levels weren’t correct. Running calibration afterward fixed it immediately and made the dimming smooth and accurate. You can also set custom brightness percentages if you want precise control. Build quality feels solid, and the design is clean. A standout feature is the subtle glowing ring when the light is off—it’s surprisingly useful in a dark room. If you don’t like it, the ring can be disabled in the device settings. The only downside is cosmetic: if you’re replacing a switch that uses a double faceplate, you’ll need to reuse your existing plate or buy a matching double to avoid mismatched covers. Bottom line: easy installation, reliable performance, and thoughtful features. Highly recommended.

It's easy to miss but this smart switch requires neutral. Remember that the presence of a white wire in the switch box does not necessarily mean you have a neutral to work with. In many cases, especially old houses, a white wire might be installed as a switched-hot (or anything else really, depending who installed it). If a white wire in your switch box is attached to a dumb switch, then that is NOT a neutral wire, and if there's no other neutral wire in the box, you cannot use this product. I'm giving it 5-stars because it does work well when neutral is available. Remember also that these don't work with smart bulbs, which cannot be dimmed by wired dimmers, only through smart home software, either by apps or through controllers. So you need to make a choice - software-only smart bulbs with color options, or smart switches that let you dim dumb bulbs without control over hue. Eventually, maybe in 1-3 years, the world will have working dimmer controllers that can work with smart bulbs, but we're not there yet. Recent updates to platforms like Google Home haven't gone far enough. Recent products like IKEA Bilresa are too buggy and poorly supported for prime time. The right bowl of porridge is still 1-3 years away. For my husband and I, the best decision was to wait for the right product, rather than compromise. But if you have dumb bulbs AND a neutral wire, this product is a very good quality and affordable way to add a physical dimmer switch with smart home controls. If you don't have a neutral wire, there are some no-neutral devices that do what this one does, but their prices start around $50, which is a lot for a switch. Best of luck to you.

Reliable switch, great firmware, app, and customer service support. This is the switch that you would expect from an excellent networking company! Well done Tapo / TP Link! I have approximately 30 of the dimmers and 3 or 4 of the on/off switches running in a Home Assistant-controlled smart home. For those of you with HA - your best bet is to go through HACS and download the Tapo Controller. If you're not using Home Assistant, well...what are you thinking? The dimmers & switches are ultra-reliable, fast-acting, and seem to have some baked-in self-healing WiFi routines. Nice work software/firmware team! Even after power is cycled on multiple breakers, the switches continue to try to re-establish their WiFi connection. Over a few days, they all return to the "white circle", fully connected status. If you're impatient, you can press the right button below the main switch on each of these to power cycle the switch and re-initiate the WiFi connection process. Some of these dimmers I am running as no-load remotes to control multiple other bulbs and switches. Even in those applications, response time is almost instant. The command always goes through and usually with imperceptible delay. Okay, so I've had these installed for about 20 months now and I haven't been without issues. I had an overnight failure of ten, yes 10 of the dimmer switches right around the 18-month mark. They were on separate circuits and kind of all over the house, some were right next to another dimmer that did not fail in the same junction box with the same hot/neutral/ground lines attached. While it looks a little like a failed firmware update, I just don't know for sure. There was no storm or electrical activity that night and nothing else in my electronics-heavy home was damaged. Anyway, TP Link honored the 2-year warranty. Yes, I had to jump through a few hoops, mostly answering honestly too many questions and return shipping is on the buyer to get replacements. It also took about a month, which is too long TP Link! But I did it all through the proper channels and TP Link did replace the failed switches with brand-new units. Overall, this is a really solid product from a reliable company. I do think at a budget price-point, this is the best choice for Matter-over-WiFi for North American smart home users. Would Matter-over-Thread be better? Almost certainly! It's just not available yet. (Hint, hint TP Link.)

Pros: - Quick Matter integration into Home Assistant - Relatively fast response (only about 1 second delay) - Quaint little circle LED for identification in the dark - Nice touch including wire labels and Matter QR code stickers, though it's not clear why they're stickers. - Greater range on the low end of dimming than my old ones (though some of my lights turn off completely due to varying tolerances between bulbs). - I like the contacts used for Live, and the tinned wires for Neutral and Ground. However, neutral really should be solid copper imo. Cons: - Dimmer is not as Linear as I'm used to. Soft on/off occurs in noticeably discrete steps, same with clicking up or down. My old digital dimmers were fully linear. - No double tap to max brightness - Very limited functionality with HA. For instance, you can only command on/off and brightness level. You cannot READ any settings such as if it's on or off, or the current brightness level. You can Neutrals: - These come with cover plates, which is a kind thought, though completely useless for me and probably a majority of people since I only have 1 single switch in my entire house. I bought 6 PAIRS of these dimmers and standard switches, so it would be more logical to include a double decora plate, which is a majority of what I have in the house. - On a couple, I've had to hard reset several times for the initial setup. This may be due to Home Assistant's Matter integration being in Beta, but there seems to be a hiccup between Bluetooth credential transfer and actually integrating. UPDATE 12/3/2024: Be sure to either block these MAC addresses from internet access, or blacklist the domain "n-use1-device-api.tplinkcloud.com". I noticed have hundreds to thousands of queries from these switches every day, even though I am using them completely through Home Assistant and have never connected them to a TPLink account. Basically they are tracking your usage without your consent (no Terms of Service or Agreement was ever signed or acknowledged).

These are working great so far. I replaced some old WeMo dimmer switches that are no longer supported. They are easy to install and get setup with the Tapo App. I can control them with any smart home with Voice control. The dimmer can be calibrated for Low to high settings. They can also be set on a timer in the app. I have used them with Siri and Alexa devices. Will definitely purchase more for my home. Dimmers work great with my LED Bulbs

The product itself was initially disappointing. It never fully worked properly. The switch worked fine as a conventional dimmer switch but would not work reliably via Alexa or the Tapo app. I called support which was initially a bot, and then chatted with Jonathan who worked with me for quite some time to resolve the problem. After a lengthy exchange and attempts to get the switch working, he felt it was likely a defective switch and I would be granted a replacement. I have always said that it is not the initial problem that determines my opinion of a company, but rather how the issue is handled and resolved to the satisfaction of the customer. It is the primary reason to continue doing business with the company. Jonathan did everything he could to help me get it working and the company is providing a replacement. These days it doesn't get any better than that!

Muy bueno para un ventilador. Los únicos inconvenientes en mi caso, para el uso mencionado, son: -Los 7 niveles de los BOTONES FÍSICOS del dimmer para un ventilador de este tipo, no se pueden usar todos, solo son útiles los tres niveles más altos, en este orden: séptimo mñaxima velocidad, sexto media velocidad, quinto velocidad muy suave, pero agradable ...y de ahí hacia abajo, para un ventilador, los niveles de los botones físicos ya no son utilizables. -En la aplicación, se pueden personalizar 5 niveles, y en el caso de mi ventilador, programando tales niveles a 72%, 80%, 85%, 90%, 100% obtengo todo el rango de velocidades de mi ventilador, desde muy suave y silencioso, hasta viento violento, lo cual con los controles manuales del ventilador no es posible. -Desafortunadamente los niveles de los botones físicos, no se pueden personalizar como sí es posible mediante la app; aún así, como lo indiqué en el primer punto, esos tres niveles son muy prácticos. Si bien, este dimmer/atenuador está diseñado para luces y no para ventiladores, estoy bastante contento con los resultados con mi ventilador tipo industrial. ACTUALIZACIÓN DICIEMBRE 2025: Actualmente el dimmer YA SE PUEDE CALIBRAR desde la aplicación, en "calibración de atenuación". Con esto, la atenuación mínima y máxima, se ajusta por única vez; y con ello ya son 100% útiles cada uno de los 7 niveles de los botones físicos. En resumen, la desventaja inicial ya es cosa del pasado, ya funciona perfecto con mi ventilador, ya sea mediante los botones físicos, o mediante la app. Lo único que desearía, es que la escala de intensidad quedara encendida todo el tiempo en que está encendido el dispositivo (ya que esta se apaga en unos cuantos segundos), en fin, es un pequeño detalle, pero a más de un año de mi compra inicial estoy muy contento

Excellent produit très bien calibré et qui fonctionne à merveille.

Works as advertised, it is hard wired to the wall, you must have basic wiring knowledge to install it. Lever nuts will not work, you must connect the wires to the conductors (screws)

So far so good! This product was extremely simple to install, and even easier to set up using the Tapo App. The dimmer buttons are very tactical and offer a solid click when pushed. The on/off button has a good spring-like action when pushed. The App also offers tons of automations and customizations. For example, between the hours or 11PM and 6AM, I limited the brightness to 25% so if I need to turn on the light in the middle of the night, I'm not blinded!

Funciona con Alexa muy bien y fácil de conectar y configurar, atenúa bien la iluminación de mi lampara LED.