PIR Motion Sensor Reference
A passive infrared (PIR) sensor that outputs a digital HIGH signal when it detects motion from a warm body within its field of view.
Pin names
| Name | Description |
|---|---|
| VCC | Power (5V) |
| OUT | Signal Out — HIGH while motion is detected |
| GND | Ground |
Attributes
This component has no configurable attributes.
Usage
Connect VCC to 5V, GND to GND, and OUT to a GPIO configured as INPUT.
const int PIR_PIN = 2;
void setup() {
pinMode(PIR_PIN, INPUT);
Serial.begin(9600);
}
void loop() {
if (digitalRead(PIR_PIN) == HIGH) {
Serial.println("Motion detected!");
}
delay(200);
}Real PIR modules typically need 30–60 seconds to calibrate after power-on, and have an onboard trimmer for sensitivity and hold-time — the simulator model skips this warm-up.
Examples
| Description | Attrs |
|---|---|
| Default PIR sensor | {} |
See also
- Tilt Switch — another simple binary digital sensor
- HC-SR04 — distance-based alternative for presence detection