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Sonoff T4EU1C Smart Switch - No neutral required! £9.76 delivered from AliExpress/Sonoff store
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Sonoff T4EU1C Smart Switch - No neutral required! £9.76 delivered from AliExpress/Sonoff store

42
Posted 23rd Feb

This deal is expired. Here are some options that might interest you:

Been keeping an eye on these, this seems to be the cheapest it’s been!

Smart switch which does not require a neutral wire, can be used with Alexa, GoogleHome etc etc
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42 Comments
Can you still manually switch the light with this?
Also apologies, cannot click on heat, it seems to think I've clicked on downvote!.
Edited by: "polarbaba" 23rd Feb
Any suggestion on a led dimmer version
polarbaba23/02/2020 09:57

Can you still manually switch the light with this?Also apologies, cannot …Can you still manually switch the light with this?Also apologies, cannot click on heat, it seems to think I've clicked on downvote!.


This replaces your current wall switch so yes you would manually use this to control the light with the smart wifi control as extra
welshblob23/02/2020 10:01

This replaces your current wall switch so yes you would manually use this …This replaces your current wall switch so yes you would manually use this to control the light with the smart wifi control as extra


Excellent, have been looking for something like this!, And at this price it's very manageable. Do I need a hub?, And how do I pair it with the wifi
Edited by: "polarbaba" 23rd Feb
bagga21223/02/2020 10:00

Any suggestion on a led dimmer version


Sonoff released their first dimmer late last year and seems to focus on rf control although I think it still has wifi control too and needs a neutral. You also need a deep wall box on your switch so I don't think its aimed at the uk market.

youtube.com/wat…-Zg
Edited by: "welshblob" 23rd Feb
welshblob23/02/2020 10:03

Sonoff released their first dimmer late last year and seems to focus on rf …Sonoff released their first dimmer late last year and seems to focus on rf control although I think it still has wifi control too and needs a neutral. You also need a deep wall box on your switch so I don't think its aimed at the uk market. https://www.youtube.com/watch?v=kbIVm80S-Zg


Aaaa thx
polarbaba23/02/2020 10:02

Excellent, have been looking for something like this!, And at this price …Excellent, have been looking for something like this!, And at this price it's very manageable. Do I need a hub?, And how do I pair it with the wifi


No hub required, pairs directly to your router.
bagga21223/02/2020 10:05

Aaaa thx


I want a non-neutral, shallow wall box dimmer version as well single gang, double gang and some options for chrome / brushed steel switches. I doubt I will ever get all those options from sonoff.
Not sure but seems this is for Europe? Iv previously purchased with the neutral need and recall there being a difference in uk and Europe switches... Someone more knowledgeable may be able to confirm or tell me im talking rubbish.
It's worth pointing out you have to fit the anti-flicker module in the light fitting, if you dont have an understanding of electrical lighting get someone who does to fit this.
voicon23/02/2020 10:14

It's worth pointing out you have to fit the anti-flicker module in the …It's worth pointing out you have to fit the anti-flicker module in the light fitting, if you dont have an understanding of electrical lighting get someone who does to fit this.


I thought it was more like a resistor in parallel with the bulb so that there would be a minimal supply for the switch electronics to work off.

Edit : Maybe I'm wrong and it gets the minimal supply via an incandescent bulb but the anti-flicker filter is needed for LEDs ... and/or to also provide supply
Edited by: "welshblob" 23rd Feb
Thanks OP have been using Aqara ones, but will give this a go too
welshblob23/02/2020 10:21

I thought it was more like a resistor in parallel with the bulb so that …I thought it was more like a resistor in parallel with the bulb so that there would be a minimal supply for the switch electronics to work off.Edit : Maybe I'm wrong and it gets the minimal supply via an incandescent bulb but the anti-flicker filter is needed for LEDs ... and/or to also provide supply


I haven't fitted this, I have sonoff switches but not no neutral, I believe the unit wont work at all without the "anti-flicker" module, they can call it what they like but it's still required in all installations.

As I said not fitted one but I cant see this device working without it.
This has a maximum input current of 2 amp, UK lighting circuits have a 6 amp MCB, so you'll need to install a fuse in the wiring feeding the light switch.
Edited by: "melted" 23rd Feb
dent020723/02/2020 10:10

Not sure but seems this is for Europe? Iv previously purchased with the …Not sure but seems this is for Europe? Iv previously purchased with the neutral need and recall there being a difference in uk and Europe switches... Someone more knowledgeable may be able to confirm or tell me im talking rubbish.



Yes the EU ones are deeper than the UK. so expect to use some spacers or make some more space in the box
dent020723/02/2020 10:10

Not sure but seems this is for Europe? Iv previously purchased with the …Not sure but seems this is for Europe? Iv previously purchased with the neutral need and recall there being a difference in uk and Europe switches... Someone more knowledgeable may be able to confirm or tell me im talking rubbish.


You are not the only one. It is for eu and it didn't work for me just no response. This is how the back looks
39966851.jpg39966851-npmBw.jpg
Edited by: "Halfaudio" 23rd Feb
Halfaudio23/02/2020 13:39

You are not the only one. It is for eu and it didn't work for me just no …You are not the only one. It is for eu and it didn't work for me just no response. This is how the back looks [Image] [Image]


This is a different model and requires a neutral wire. If you were only using the live terminals it would not have worked.
mattps23/02/2020 13:44

This is a different model and requires a neutral wire. If you were only …This is a different model and requires a neutral wire. If you were only using the live terminals it would not have worked.


I did use the neural wire and it gave no response the light was on (on the switch itself) but nothing happened.
melted23/02/2020 11:42

This has a maximum input current of 2 amp, UK lighting circuits have a 6 …This has a maximum input current of 2 amp, UK lighting circuits have a 6 amp MCB, so you'll need to install a fuse in the wiring feeding the light switch.


Could you not just make sure your load is less than 2amp? 440 watts is more than enough for one light really.
I wanted a dimmer so bought a Shelly Dimmer (requires neutral however). Worth checking out , only cost about £20.

https://shelly.cloud/wifi-smart-home-automation-shelly-dimmer/
Edited by: "soton26" 23rd Feb
Hi
I have a sonoff with no neutral requirements but you have add transistor to the light direct and it is big
39967142.jpg39967142.jpg39967142.jpgEasy to paired to virgin router but I split 2.4 from 5ghz and I used my old phone android 8.1.
I had a problem with my mia3 android 9.
The biggest issue with this switch you have to hard press the glass to switch manually.
I bought another switch for me nicer design without any name and WiFi icon only circles change color from blue to red easy to use by kids.
and over the phone.
39967142.jpg39967142.jpg39967142.jpgEasy to hide a small transistor in white cover as opposed to sonoff.
Edited by: "kendzi1" 23rd Feb
stratplayer200123/02/2020 12:15

Yes the EU ones are deeper than the UK. so expect to use some spacers or …Yes the EU ones are deeper than the UK. so expect to use some spacers or make some more space in the box


27mm depth required for the switch plus the extra space for wires etc
I tested them from December 2019 and so far very good.
a nice video explaining how it works
umar8823/02/2020 14:01

Could you not just make sure your load is less than 2amp? 440 watts is …Could you not just make sure your load is less than 2amp? 440 watts is more than enough for one light really.


The 2amp output rating is not a problem, but the 2amp input rating is.

If a fault occurs in the light, the wiring, or the sonoff, you would not be able to guarantee the current flowing does not exceed the 2 amp input rating of the sonoff, because the fuse or MCB in a standard UK lighting circuit will not trip out below 6 amps.
Edited by: "melted" 23rd Feb
kendzi123/02/2020 14:28

HiI have a sonoff with no neutral requirements but you have add transistor …HiI have a sonoff with no neutral requirements but you have add transistor to the light direct and it is big [Image] [Image] [Image] Easy to paired to virgin router but I split 2.4 from 5ghz and I used my old phone android 8.1.I had a problem with my mia3 android 9.The biggest issue with this switch you have to hard press the glass to switch manually. I bought another switch for me nicer design without any name and WiFi icon only circles change color from blue to red easy to use by kids. and over the phone. [Image] [Image] [Image] Easy to hide a small transistor in white cover as opposed to sonoff.


Can't you hide the box with the capacitor in it in the ceiling void.
melted23/02/2020 14:50

Can't you hide the box with the capacitor in it in the ceiling void.


Yes I can (make a bigger hole in the ceiling) but I like easy jobs and nice looking things.
I bought two of them to test and see what is looking better and works better for me.
Is £14 ish the cheapest for double?
voicon23/02/2020 10:14

It's worth pointing out you have to fit the anti-flicker module in the …It's worth pointing out you have to fit the anti-flicker module in the light fitting, if you dont have an understanding of electrical lighting get someone who does to fit this.


Im sure I'll find a video on YouTube of how to fit it.
melted23/02/2020 14:47

The 2amp output rating is not a problem, but the 2amp input rating is.If a …The 2amp output rating is not a problem, but the 2amp input rating is.If a fault occurs in the light, the wiring, or the sonoff, you would not be able to guarantee the current flowing does not exceed the 2 amp input rating of the sonoff, because the fuse or MCB in a standard UK lighting circuit will not trip out below 6 amps.


Could always get 2amp MCB if you're that bothered.
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deleted2410437
I'd rather drop a neutral down. The reality if "no neutral" types is they hold the circuit closed with enough resistance to power the device but not enough to light a bulb, but the reality it some LED lights can glow or flicker at night. Basically the light is never fully off.

I use the Aeotec Nano switches hidden underneath the ceiling rose where there is always a neutral and they don't flicker as the light is completely off.
The display light on the front, does it turn on when the switch is on and off when switch is off? Can the display light be disabled?
I have the Sonoff mini in the daughters room.
Installed it as a test to see how I get on...
It’s installed in the ceiling rose, inside of an ikea light fitting.
works very very well!
It requires a neutral, but as it’s in the rose, it’s fine.
The manual switch works fine and responds as quick as a regular light switch.
Alexa controls the light regardless of the switch position.

Took a little for me to get my head around the wiring (loop through rose) but I’m very happy, so will be installing throughout the house now.
kendzi123/02/2020 14:56

Yes I can (make a bigger hole in the ceiling) but I like easy jobs and …Yes I can (make a bigger hole in the ceiling) but I like easy jobs and nice looking things.I bought two of them to test and see what is looking better and works better for me.


Oh I see, I thought you meant you had left it like that!
darksideby18223/02/2020 16:36

Could always get 2amp MCB if you're that bothered.




Something like this fused connector block mounted inside a suitable enclosure in the ceiling void might be better. Not worth the risk of a faulty light bulb causing your light switch to catch fire.

It is a pity the manufacture didn't design it to be safe on a 6 amp circuit, even if they just used a hardwired 2amp fuse after the input.

Think I'd sooner make my own wifi smart switch using something like an esp chip or sonoff basic, have it mounted above the light rose in the ceiling void and use the existing switch cable as a low voltage input, so no neutral wire would not be an issue. Only downside is I wouldn't have a fancy touch switch control.
Edited by: "melted" 23rd Feb
welshblob23/02/2020 10:21

I thought it was more like a resistor in parallel with the bulb so that …I thought it was more like a resistor in parallel with the bulb so that there would be a minimal supply for the switch electronics to work off.Edit : Maybe I'm wrong and it gets the minimal supply via an incandescent bulb but the anti-flicker filter is needed for LEDs ... and/or to also provide supply


Unfortunately Sonoff are still using the dated leading edge technology which isn't always suitable for dimming leds. I've experimented with many types of claimed led dimmers only to be disappointed by flicker and unstable adjustment especially on light loads.
Until manufacturers get their heads round the fact that only Trailing edge dimmers work with the majority of dimmable led's, customers are always going to experience very hit and miss results.
Edited by: "modelman" 24th Feb
modelman24/02/2020 14:08

Unfortunately Sonoff are still using the dated leading edge technology …Unfortunately Sonoff are still using the dated leading edge technology which isn't always suitable for dimming leds. I've experimented with many types of claimed led dimmers only to be disappointed by flicker and unstable adjustment especially on light loads. Until manufacturers get their heads round the fact that only Trailing edge dimmers work with the majority of dimmable led's, customers are always going to experience very hit and miss results.


Yes I've seen flicker and high pitched screeching from some leds when on a trailing edge dimmer specifically for led's. However I believe it was a rogue bulb doing it. The bulbs themselves have to be of good quality too.
Either a mistake or a scam, but here’s my “switch” from ALIExpress
40028931-GNnPD.jpg
DJBenson02/03/2020 19:18

Either a mistake or a scam, but here’s my “switch” from ALIExpress[Image]


Hey you got 4!!!
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