It's a good sensor to detect small random motions. I have used it near a door to sense when it opens
The M5 Stack PIR Motion Unit (AS312) is a human body infrared unit that detects the infrared radiation emitted and reflected by the human body or object. When infrared is detected, the output level is high and it takes a while. The unit has a 2-second delay time and communicates with the M5Core via the GROVE B. It has a sensing range of less than 100° and a quiescent current of less than 60uA. The unit supports UIFlow and Arduino and has two Lego installation holes. The M5 Stack PIR Motion Unit (AS312) can be used in various applications, such as an automatic system to perform the tasks of Safe Entry, a gate/door fingerprint security system with body temperature checks for the anti-COVID measure, and a simple watch device using UIFlow. The unit is reasonably priced and has received positive reviews for its quality and usefulness. The M5 Stack PIR Motion Unit (AS312) is available for purchase from various online stores.
1x PIR unit
1x GROVE Cable
|32 x 24 x 12mm
For more details, please check our Shipping and Return Policy