The Sonoff mini-R4 in now available in a "matter" version! This means it's possible to have direct local control, and you don't have to rely on a third party server and app! This means that even if the server goes down, you can still control it locally with Google home, amazon alexa, apple, or any other "matter enabled" devices. You also don't need to flash the firmware to get local control.

Unfortunately, the "mini-R4M matter" is not available in a NO-NEUTRAL version. But I think my updated NO-NEUTRAL circuit, will be a good solution, if you don't have a neutral wire behind your light switch. I know not everyone is comfortable building mains voltage circuits. So If you would like to try my updated version, but don't feel like making your own, I will have a link here, where you can try it out for yourself. ebay link will be updated from time to time https://www.ebay.co.uk/itm/186231351698

https://www.ebay.co.uk/itm/186227885482

You can get the Sonoff MINIR4M here https://itead.cc/ref/169/ and use my coupon at the checkout for a 10% discount MYPROJECTBSONOFF

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The NO-NEUTRAL adaptor kit, consists of two modules, a "neutral splitter" and bypass module. All the wires are clearly labelled for correct termination. The bypass can easily be connected to "most" LED light bulbs and LED lights, but some of the older LED lights are NOT compatible! (the type with capacitor dropper driver)
This circuit hack has been reported to work with many different devices, But I can only verify the ones in this video, and there are definitely devices that don't work!

00:00 Intro
00:14 Sonoff first matter device the MINIR4M now has direct local control without the need for cloud services or apps
00:49 The minir4m still needs a neutral connection to function unfortunately
01:18 I think my new improved no-neutral circuit will work with MINIR4M
01:54 Diagram of my new NO-NEUTRAL circuit with neutral-splitter and bypass module (take a screenshot)
02:38 Setup of the MINIR4M matter device with Google home is quite simple
03:47 Let's try to use it without a neutral connection behind the light switch
04:25 The difference between my old and new improved circuit
06:18 Wiring it up to a lighting circuit, using my modules
09:21 Different ways to connect the light switch to S1 and S2, with diagrams (S1 & Lin are linked together internally)
10:03 My circuit now works better with multiple LED light bulbs connected in parallel
11:11 The modules also work with different smart light switches and smart relays, like SwitchMan Smart Wall Switch-M5 & NSPanel and more!
12:58 In conclusion, it may also work with other brands as well, like some tuya devices, but not with everything!