For detecting human motion, the Grove PIR sensor is ready to plug in and use. When somebody comes through it’s detection range, it sends a HIGH signal out to the microcontroller.

Specifications:

• Grove compatible interface
• BISS0001 micro power PIR motion detector IC
• 7 – 14 um wavelength sensor
• Jumper selectable “retriggerable” / “non-retriggerable” to set output HIGH signal duration (double triggers reset output timer or not)
• 3-5VDC
• 20 x 40mm (0.78 x 1.57″)
• Detecting angle: 120 degrees
• 3M (9.8′) default detection range (6M / 19.7′ maximum by SMD tuning potentiometer not included)
• Adjustable detecting distance and holding time (SMD potentiometer not included)

Links:

• PIR Motion Sensor wiki
• Github – Grove_PIR_Motion_Sensor