void setup() Serial.begin(9600); pinMode(motionPin, INPUT); pinMode(ledPin, OUTPUT); Serial.println("HW-416-B warming up..."); delay(60000); // Critical: Allow 60s stabilization
HW-416-B → Arduino VCC → 5V GND → GND OUT → Digital Pin 2 hw-416-b pir sensor datasheet
This article serves as a complete , covering every technical detail you need: electrical characteristics, pin configuration, sensitivity adjustment, time delay settings, wiring diagrams, and troubleshooting tips. void setup() Serial