HC-SR501 – Motion Sensor

For a new ESP HomeKit project I need a Motion Sensor. There are Serveral options out there, but the most common ist the HC-SR501 Passive Infrared (PIR) Motion Sensor. Becuase there is more to it than just sense motion, I gonna explain the fuctions from this little device.     The HC-SR501 Passive Infrared (PIR) […]

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