This should do you and it’s a dimmer, Shelly dimmer SL
https://shelly.cloud/wifi-smart-home-automation-shelly-dimmer/
Sorry should have said for sdwilko Wilkenism
Those Shelley dimmers look neat. I can’t figure out if they will integrate with a switch that has an existing dimmer (e.g. if set to 50% at the wall, could the smart dimmer change between 0-100 still?)
And thanks OP, this is a great idea I’ll investigate for use in AU too.
I think you are mistaken.
From memory the ceiling rose has live and neutral going in (and out) of it. The switch is connected to the ceiling rose via two wires. Live is passed from the ceiling rose, down to the switch, and then back up to the bulb.
You can connect a second switch (sonoff mini) between the live and the bulb but you are either going to do it in parallel with the switch, or in series. Either way I can’t see how this works well. Either the switches are dependent on one another, or they are independent. If they are independent I can’t imagine anything more frustrating than flipping a switch and having the light stay on.
A Sonoff mini could be used here, and you would want to move the switch to the s1/s2 connections on it. This would mean that the sonoff would be turning the light on and off but monitoring the switch as well.
Not sure if you are talking about the sonoff here or not but the Eachen units I’m using have live and neutral inputs, live switched output to bulb and a mains toggle input. This means the normal wall switch toggles the unit as well as the smart home commands 
Thanks Andy. It works the same way as the sonoff mini then. I was responding to Hercules 187 who said the sonoff mini wouldn’t work.
So, the bulb and controller are connected to the live and neutral, and the lines going to any switches are connected to the switch inputs.
Sounds like a good move, and keeping the controller outside of any metal junction box makes communication easier.
Hey guys, I was reading and I noticed the sonoff reference you are making requires communication to the ewelink cloud… I recommend this one which communicates through LAN:
It cuts response times significantly.
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Hi Mark the shelly Dimmer SL is not compatible with 110V. only the non SL version is and requires the neutral wire sorry…
Hi! I still dont understand how you solved 2 switch issue: using the main switch will cut the power to your Eachen unit placed on the ceiling, right?
Something doesn’t make sense, what I’m not getting?
Hi Pieter
Take a look at
https://shelly.cloud/wifi-smart-home-automation-shelly-dimmer/
But with the SL version neutral wire is optional
You could try the Itead Sonoff T4EU1C Wall Wifi Smart Touch Switch, which requires no neutral. It comes with an anti-flicker module which you connect to the live and neutral wires at the lighting fixtures in the ceiling rose. It is about the size of a 25ml ointment packet and white.
Ok, not sure what they’re using if it works with only live. In my home, I’ve made some automations using esp8266 modules (connected with wifi to home assistant), placed them next to the main switch in each room, and they both work (meaning you can turn on using the switch and turn off using voice, google assistant).
But my issue is that in the switch I only have live, no neutral, so in order to power my devices I had to add wires with 220v.
I have one of this and can confirm it works nice. I’ve flashed with tasmota and hook it up to HA.
That’s handy to know but no good if you need a 2 way switch for a stair case and such.
I’m going to sound really thick here and for that I apologise, but is there any reason other than space that people decide to put these in the ceiling rose.
The reason for asking is that I do not have any ceiling mounted lights and I’m looking to automate the wall sconces which I have. My thought is to get a deeper wall box and mount this there (Or remove the switch entirely and use a blanking plate)
I’ve been waiting for the Shelly Dimmer SL as I’d like to be able to dim as well but this will be sufficient for the time being.
The switch box often doesn’t have a neutral wire, the ceiling rose does…
Had a look at the wiring last night and you are right, I have a neutral at the light but not at the switch.
I’ll be waiting for the Shelly Dimmer SL then as this doesn’t require the neutral at the switch. I find it surprising that there are not more offerings to overcome this issue.
I think there are. Some Zigbee (?) switches do not require neutral. But it a) comes with a higher price tag and b) lock you into a certain niche rather than just RF.
Sonoff do a WiFi connected wall switch for no neutral which is cheap
https://h5.aliexpress.com/item/4000094260157.html
However it is only on/off so no dimmer
Just an FYI for the main reason I decided on a ceiling mounted device.
I have multiple switches, linked together in 2 way configurations with 3 switches on one of those.
Whilst I can get switches that work with no neutral, 2-way always seems to rely on one switch using WiFi and logic.
I didn’t want lights not being able to be switched from certain switches in the event of WiFi or computer issues. My wife wouldn’t be impressed lol.
Plus, if you have a two way set up for the stairs (one switch bottom, one switch top and the one bulb over the stairs) if you go the smart switch route you will need two, or doing this you will only need one of these relays at the ceiling rose.