I finally figured out how to do 2-way light switching on the Sonoff miniR2, without a neutral wire behind the light switches. it basically uses the same circuit hack, where I put the Sonoff mini by the light fixture itself (providing better Wi-Fi reception and no neutral required behind the light switches). Thanks to one of my viewer suggestions. I figured out where to put the diodes on the light switches to make it work. I also made some improvements to the Circuit, that stopped the LED bulbs from flickering, on some brands. You can get the Sonoff MINIR2 here https://itead.cc/ref/169/ and use my coupon at the checkout for a 10% discount MYPROJECTBSONOFF If you would like support me😉😁 https://patreon.com/MyProjectBox https://paypal.me/buddymel https://revolut.me/roberteygb 00:00 Intro 00:10 I admit to being wrong about something 00:16 Is two-way or three-way lighting possible with my optocoupler hack circuit for Sonoff mini? 01:20 My no-neutral circuit with a diode across the light switch. 02:57 Using momentary "push switches" in parallel, works fine, but it's not an elegant solution. 03:33 Orlin Dimitrov's suggestion of using two diodes per light switch. 04:24 Enough with the Theory. Here is a practical demonstration circuit. 07:12 You can get momentary action switches, that look like traditional light switches. 07:48 I made a slight Improvement to my original circuit to make it more compatible with more LED bulb brands, and reduce unwanted flickering. 08:38 I added header pins to the PCB, which line up perfectly with the screw terminals on the miniR2, for easy termination. 08:57 My hack only work on the 2 wire version of 2-way switched lighting, but there are other versions as well. 09:49 There's a brand new sonoff miniR4 coming out soon! and it's tiny! Hopefully my hacks will work on that too.