BoardPilotHC-SR505 mini PIR motion sensor with ESP32
Supply 4.5-20 V
Bus GPIO
Measures motion
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| VCC | Power | 3V3 | Marked +. Needs 4.5 to 20 V: use VIN |
| OUT | Output (the part drives it) | D25 | HIGH (3.3 V) for about 8 s after motion |
| GND | Ground | GND | Marked - |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Starter code (Arduino)
void setup() {
Serial.begin(115200);
pinMode(25, INPUT); // OUT
}
void loop() {
Serial.println(digitalRead(25));
delay(100);
}Sources
- HC-SR505 seller datasheet, Supply 4.5 to 20 V; output HIGH 3.3 V, LOW 0 V; delay about 8 s; range up to 3 m
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.