README.md

HLK-LD012 Connect Diagram

LD012 Out <----> GPIO5 (In this Case, just pick any input pin what you want)
LD012 P2 <----> GPIO13 (In this Case, just pick any input pin what you want)
LD012 GND <----> GND
LD012 Vin <----> 3.3V Source

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