Got/buying a smart switch? Read this

All electrical lighting questions in here please. Including outside lighting and light switch / dimmer questions.

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Someone-Else
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Got/buying a smart switch? Read this

Post by Someone-Else »

Before you buy a "smart switch" please check the wiring for your existing switch.

If all you have is as below (May also be Two reds, or just Two browns or One blue, One brown)

sw2.jpg
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And you are thinking of buying a switch that looks like / similar to the one below.

sw3.jpg
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I am sorry to say but you can not use it. It needs a neutral to operate. If you turn the switch round (as shown below)

SW1.jpg
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You can clearly see it has Terminals marked L1, L2, L AND N

L and L1 are live and switched Live, but the N is Neutral which the majority of UK light switches do not have, and there is nothing you can do about it. (Short of rewiring it)

If you have other / more wires (Recent new builds do) then please post a picture, you may be in luck.


ALSO NOTE

1) These switches require a 35mm deep back box. Most back boxes are 25mm (some are 16mm) so that will mean you will have to take all the wires out, or buy an extension, which doesn't look nice.

2)There are other alternatives such as sonoff or philips hue. (These have to be mounted in the light fitting / ceiling)

3) They will only work on 2.4ghz wi-fi, not all routers have 2.4ghz
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ultimatehandyman (Sun Jun 26, 2022 6:42 am)
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Above are my opinions Below is my signature.

Would you hit a nail with a shoe because you don't have a hammer? of course not, then why work on anything electrical without a means of testing Click Here to buy a "tester" just because it works, does NOT mean it is safe.

:mrgreen: If gloom had a voice, it would be me.

:idea1: Click Here for a video how to add/change pictures


Inept people use the QUOTE BUTTON instead of the QUICK REPLY section :-)
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ericmark
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Got/buying a smart switch? Read this

Post by ericmark »

Even the light switches not requiring a neutral still have problems, the energenie switches I use have caused problems, although there are ways around the problems, there is a list of tested bulbs, not approved, just tested and found to work, I have had no problems with BA22d base bulbs, but with G9 bulbs have needed to add a 4 uf capacitor across bulb to stop it flashing when switched off. Some bulbs tend to shimmer when switched on, never worked out why, also two way switching needs master and slave and the terminal marked S tells the master when to switch, so even with two wire electronic switches there are still three terminals and earth, the S terminal is only used with two way switching and means "Slave".
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So this is the back of a switch which does not need a neutral, still three terminals plus earth. Note it also needs a hub, which is hard wired, it does not connect direct to wireless LAN.
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Got/buying a smart switch? Read this

Post by rapidnailer07 »

I believe there are some smart light switch solutions that do not require neutral. Lightwave doesn't require neutral, nor does Shelly modules. However, they do consume more power than smart switch solutions that can take neutral.
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Got/buying a smart switch? Read this

Post by Rorschach »

I am using a Sonoff smart switch for a light, works great and very easy to install as it is installed at the fitting which always has the necessary L and N.
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Got/buying a smart switch? Read this

Post by ericmark »

Of the five smart switches three have gone faulty, now using smart light bulbs, zigbee from Lidi, one does have a remote control, so can switch off from bedside without using phone.

When I fitted the smart light switches it did seem the right way to go, I got two way type lighting without need for wiring using remote controls, however in hind sight, when a smart switch fails it is hard to do a fast return to standard switch, but when a smart bulb fails easy to swap for standard bulb without switching off lighting supply to other rooms to do it, so now would go for smart bulbs.

The Lidi remote
Lidi-remote.jpg
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it seems only comes with the three GU10 lamp pack, but there are others available on the internet. The Lidi one comes with a magnet back which can be wall mounted, so can be used like any other wall switch.
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Got/buying a smart switch? Read this

Post by kellys_eye »

Ohhh noes...... how did we ever survive without a smart switch facility.

....oh yes, I know. We got off our fat arses and pressed the switch. :roll:

:lol:
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Don't take it personally......
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Got/buying a smart switch? Read this

Post by LadySpark »

Thank you for the warning!
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Got/buying a smart switch? Read this

Post by ericmark »

kellys_eye wrote: Wed Jul 28, 2021 7:11 am Ohhh noes...... how did we ever survive without a smart switch facility.
In the main two way switching, and table lamps, there is nothing to stop one having a lamp at the size of your bed, traditionally the candle. The problem with the candle was house fires, so it was replaced with the torch/flash light, which was in turn replaced by the two way switch, but once a two way switch is fitted, it means very hard to rearrange the room, I spent the time and effort of fitting two wall lights either side of the bed head, and two 2 gang intermediate and two way switches, either side of the bed, and a 3 gang switch at the door, so on entering the room either bed side or main light could be switched on, and in bed one could turn off the main light or bed side lamp on your side, however this was a lot of work, and using smart lights means there is a lot less work involved.

I have three ways of working smart lights, the smart bulb, the smart switch, and the smart relay. I will compare them.

1) The smart relay, can connect to existing wiring, so the wall switch or remote/phone can turn lights on/off, disadvantage is it does not dim the lights, or change the colour of the lights, and it needs room to mount it,
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seen here against a GU10 bulb holder being tested in a chandelier, and here
Centre_bulb_colours.jpg
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finished job, which brings me to.
2) Smart bulb, the centre bulb of the chandelier is a smart bulb, allowing both dimming and colour changing, so the one chandelier has both a smart relay, and a smart bulb, both have a small problem, to control from a PC it need an emulator smart life used to work the bulbs and relay is designed for phone and tablet, not computer, you see some thing like this
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on your phone.
3) Smart switch, these work better with a neutral, without the neutral some bulbs will flash, and some switches need a neutral, however the smart switch I use was designed to be controlled by a computer, so will work both with a computer or phone, this
Mihome-used-crop.jpg
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shows the one I use, Energenie MiHome the phone looks slightly different to the PC, but both work OK. However both the relay and the switch to fit and remove takes a lot more work than the smart bulb.

The control can be direct, or using a hub, I have two hubs, one for energenie the other zigbee, the energenie remote controls work direct to switch, up to three remote controls can work one switch, it does not matter if internet fails, or you have no hub, they will still work, the zigbee remote works through the zigbee hub and I found it would not link to the relay, only smart bulbs. Since don't really want my phone at bed site, the energenie works better for bedroom.

As well as remote switching, there is also the option of timed switching, energenie would allow three on/off slots, and the on/off are tied together, you can get more by using IFTTT (If this then that) but it needs internet to work. The Smart life groups all together, items needing hub and items working direct, and you can set multi off's or multi on's without setting the other, so I can set my landing light to switch outer off at 12:30 am, and centre off at 1:30 am and hour latter, in case I forget, or turn an alarm on without first switching it off.

I find timed outside lights, which can also use the app, better than a PIR, they do not come on in windy weather, but some of the features will only work with some bulbs, so the app shows
Automation.jpg
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but not all bulbs will work with all those options.

As to voice commands, I use Nest Mini's, so hey google and the command, you want at least two words to activate voice control, or a single word sounding like Alexa can activate the unit in error. And they can be like mischief little boys, turning things off then claiming they can't turn it back on, so careful what you allow to use voice control. My landing lights have at least 4 names, hey google turn on outer switch, or inner switch, or landing lights, Light centre all with turn on/off, some selective and one can set amount dimmed, trying to remember what name you gave it can be a problem, and I have had replies like turning off 5 switches when I don't have 5 wall switches any more.

As to geofencing, found more trouble than worth, with Nest Gen 3 turning off the heating because the local EE mast was knocked out in high winds, using the phone to manually do things when away, I do use the TRV heads to show how hot the living room is, and I will manually turn on the AC before return on a really hot day, not had one this year yet, my problem is there is a limit to how much water the bottle will hold, and if running too long, it can over flow, so I can't leave running or on a timer, the heating simply use a timer.

Since the hubs are not cheap, you need to consider all smart devices, not just the lights, I even check how my home brew is doing, or the car battery charger, except for energy monitors the energenie range does not show if some thing switched on or off, the zigbee however does, the on/off button shows green when on.

As to
kellys_eye wrote: Wed Jul 28, 2021 7:11 am ....oh yes, I know. We got off our fat arses and pressed the switch. :roll:
well does not really work, when I park my car, by time I have got out, walked to the house to reach the switch, it is a bit late, using the phone means the lights are not left on when not required, or when the wind blows the trees. I could of course use the light built into my smart phone, however that's using a smart device, so can't count that.

I remember in 1981 my Chevy Blazer had a head light switch which would leave the head lights on long enough for me to reach the door and use key and switch on lights, but in the UK back then we had street lights on all night, so didn't need it, but today street lights switch off after midnight, they have it seems smart street lights, so we are forced to also use smart lights so star gazers can have a dark sky.
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