How to wire switch to dimmer (FS-05R)?

Hardware
1

Hi, I received this wifi dimmer here but I’m not sure how to actually wire it to the wall switch.

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From the manual, at least from the symbol, there’s power, brightness up and dimming.

Does it mean I need to use 3 gang switch like this?

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Or could I still use with a 1 gang momentary switch (with 2 terminals)?

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2

Hi Shaq,

So, a little advice. Do with it what you will…

  • We don’t know what country you are from or what your mains voltage is. Rules are different in every country and depending on different mains systems.
  • I would not feel comfortable asking a mains electrical question involving multiple switches like you are doing because random people will tell you random things.
  • I’m not going to tell you to not do that, but be very sure about what you end up doing, and use a meter / tester to make sure you do it right.
  • The best advice , however, might be this:
    :warning: DANGER OF ELECTROCUTION :warning:

If your device connects to mains electricity (AC power) there is danger of electrocution if not installed properly. If you don’t know how to install it, please call an electrician.

Beware: certain countries prohibit installation without a licensed electrician present

Remember: SAFETY FIRST. It is not worth the risk to yourself, your family and your home if you don’t know exactly what you are doing. Never tinker or try to flash a device using the serial programming interface while it is connected to MAINS ELECTRICITY (AC power).

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3

I’m assuming that module is meant for a 3 gang retractive switch with up, down and power buttons.

This guy on reddit had the same problem - he found a switch but it was in a US size instead of EU size. https://www.reddit.com/r/homeautomation/comments/ymaezm/im_trying_to_find_a_3_button_dimmer_eu_standard/

Hopefully someone with more knowledge about switches will show up and be able to help you identify a compatible switch based on the link above. Good luck!

4

No you can’t.
An advise : Get Shelly Dimmer 2 and you can use whatever switch you already have.

5

Yeah, that looks like it’s designed for 3 buttons and similar to other tuya dimmer.

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I could add tiny spring and make the switches retractable

Before that, do I get the wiring right for the switches? From the diagram it looks the neutral’s bridged with the switches

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6

I’m no electrician, but the wiring diagram for the switch part on that module seems wrong.

I’d expect the diagram to connect the switches to Live, not Neutral, since switches are usually connected to live. The way you have drawn it is how they expect you to connect them, but that means you’d somehow have to rewire your switch feed in your consumer unit and hook it up to Neutral.

The whole thing seems a bit iffy - I’d either throw the damn thing away or at the very least, get a very good electrician. Like the others have said, don’t try this yourself.

EDIT: Confirmed in one of the reviews for an identical product.
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7

Looks correct. Try it on the desk before you redo your house wiring.
Be aware that those dimmers don’t have any real certificates. If you burn your house, your insurance is not gonna cover it. Another reason to go with Shelly.

8

Well, i think I have a defect unit
I only wired the live and neutral and it’s not turning on, no led blinking or detected by tuya app
Will update again once i got the replacement

9

I’d have sent it back for refund & gotten a shelly dimmer personally.

Side note: in your first picture the instructions say that both input & output must be connected when testing. Maybe that’s why it’s not working.

10

I wonder what kind of circuit they have inside if they need output to work. I wouldn’t install that in my house even if they pay me…

1 Like