According to Seeed studio, Grove-mini PIR motion sensor is a simple to use passive infrared motion sensor with Grove compatible interface, allows you to sense motion, usually human movement in its ...

A simple way to think of the sensor is a switch; the diagram ... Pin “Alarm” PIR Pin “Alarm” connects to Arduino Digital 2 The code for the active low Sparkfun style motion detector ...

Last year, I took a look at some mostly low-cost passive infrared (PIR) motion ... sensor uses a “microwave Doppler radar” technique to detect moving objects. It has a sensitivity range of ~7 meters.

As a perfect example, take a look at this stupendously simple Internet-connected motion detector that [Eric William] has come up with. With just a Wemos D1 Mini, a standard PIR sensor, and some ...