Keyestudio ESP32 - 2. Working Principle; 3. Wiring Diagram

ESP32 Starter Kit
2. Working Principle
Human body(37°C) always emits infrared ray with a wavelength of 10m, which approximates to that of the sensor
detected. On this account, this module is able to detects human beings movement. If there is, PIR sensor outputs a
high level about 3s. If not, it outputs a low level .
8.5. Arduino Project 105