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LiHuashen
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## Description
**<mark>PIR</mark>** is a unit can detect human bogy
**<mark>PIR</mark>** is a unit can detect human bogy infrared light. You can judge whether someone passed by it.
is a human infrared sensor for M5GO that can easily detect
whether someone appears in front of it with M5GO Core.
If PIR detect that infrared light has changed, the signal pin of PIR will output high level. Otherwise, it'll output low level.
## Feature