How good and cheap the sonoff basic is, when first receiving it i was annoyed that it did not have an external light switch input possibility. I was used to this feature using zwave micro modules, who do have it all.
So i set out to find a solution for this problem, and no it is not acceptable to not use the original 230v light switch (using gnd and a gpio port like some use).
After some research i came up with the following solution:
The BOM for this is attached at the bottom of the topic (totalling around $10)
Attached to the wall:
Devices, rules:
The BOM (Bill Of Materials):
- Sonoff Basic (https://www.aliexpress.com/item/Sonoff- ... 22442.html)
- High voltage optocoupler (https://www.aliexpress.com/item/Optocou ... 21989.html)
- Box for optocoupler (https://nl.aliexpress.com/item/abs-swit ... 45434.html)
Sonoff 230V external light switch
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LisaM
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Sonoff 230V external light switch
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