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I'm trying to get into setting up my own home automation. I've already setup HAP-NodeJS & MQTT on a raspberry and I've flashed a esp01 with NodeMCU.

What I want to do is create a light switch with the esp01 that has a fail-safe so the normal light switch can still be used and I want it to be updated in the home app even when the physical light switch is used. I have a esp01 relay module to make this possible (schema here).

However I can't find any good tutorials on how to make this work (code for the esp & HAP-NodeJS, I was hoping someone could help me or point me into the right direction.

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    you would have to wire the light switch and the relay in a 3-way configuration and include a current sensor to detect when the light is turned on
    – jsotola
    May 29, 2019 at 3:43

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