Please note that I am actually trying to replace this with a 3 gang Sonoff - my hope was that i could use the 1st 2 buttons for the existing 2 lights and the 3rd button to trigger an automation that controls my LEDs.
I have wired the Sonoff as follows:
The 4 blue neutral wires go into the ‘N in’ on the Sonoff.
The single brown live wire that went into the original switch’s RHS common (the top RHS port on the original switch) now goes into the ‘L in’ on the Sonoff.
The 2 brown live wires that went into the original switch’s LHS L1 (bottom LHS port) now go into the first ‘Out’ on the Sonoff.
The single brown live wire that went into the original switch’s RHS L1 now goes into the second ‘Out’ on the Sonoff.
I currently have no wire going into the third ‘Out’ on the Sonoff.
Please note that the only wire in the original switch configuration that I didn’t know what to do with was the single brown live wire that goes between the 2 commons - as my Sonoff only has a single ‘L in’ i thought it was ok to omit.
Result:
I turned the power back on at the fuse box and there is no power going to the switch. (the switch definitely works as i successfully flashed it with Tasmota this morning)
I thought that there was 3 possible causes for no power:
I need that wire between the 2 common ports on the original switch on the Sonoff, if so then where should this go between?
I can’t use a 3 gang switch like i suggested, i should switch to a 2 gang and it should work? (Side note, is what i suggested to do with the 3 gang even possible?)
I have messed up the wiring somehow - i don’t think that this was the case as I had everything labelled. Also, all the wires seem well seated.
Looks OK to me, the brown link wire is not needed in the sonoff, it is just used to feed permanent live to each switch.
I assume, because you have 2 switched live wires together that that switch switches 2 separate lights ?
You’ll need to check there is definitely live going into the sonoff with a tester.
Also, might be worth wiring the sonoff for test with a plugged live and neutral wire to make sure it powers up and works first.
I do similar, but not with a sonoff, with a non connected switch to fire an automation
I thought that was probably the case re the link wire, thanks for confirming.
You are correct, the switch with 2 wires going in controls 2 separate fixtures and the 2nd switch controls some separate spotlights.
I have removed the Sonoff for now and put back the original working switch - it works fine so I know that my wiring was fine. The only possible thing I can think of is maybe one of the connections wasn’t secure, seems unlikely as i pulled them all and all connections seemed well seated but i can’t really think what else the issue could be if it is not that.
Silly question, when you say wiring the Sonoff for a test using a plug - do you mean taking a power cord that plugs into a wall socket, cutting it and then plugging the neutral and live cables in to lightswitch to check that it actually powers on? What should i do with the earth cable, just not connect it?
I had the automation working with a wireless 433MHz switch but it wasn’t very reliable in terms of recognising the button presses, hence I hoped that the Sonoff might deliver a more robust solution.
Yes that’s it, make sure you put tape over the connections before you power it up and leave the earth unconnected. And when you’re done don’t leave it lying around for someone to plug in !
This is how I test all my devices for at least a week before I install them, had too many not work and had to reflash or something.
Managed to get it working! Despite my best efforts i had muddled 2 of the wires. I only realised when I noticed that the spotlight had to be on for the other 2 lights to turn on.
That’s an awesome idea as it would avoid alot of the unknowns I was dealing with today, I will definitely do that for the next one that I install.
