I connected the modules like this:

5V (Wemos) <-> VCC (JQ6500)
GND (Wemos) <-> GND, next to VCC (JQ6500)
D6/GPIO12 (Wemos) <-> K1 (JQ6500)

And it works:

https://youtu.be/nLP6StTNFrg

No need for Resistors, right ?

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