Integrated 220V to 5v power supply, GPIO2 connected to the relay, online open source software can be used directly.
The size of the board is designed according to the 86 switch box, directly replacing the original old switch.
In addition, the three RGBLEDs above can be used as night lights. Please see the engineering schematic for details.
There are two boards in the project, one is wired and the other is not.
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