Hw416b Pir Sensor Datasheet Better [best] «2025-2026»

👉 “HC-SR501 datasheet” (not HW-416B)

else if (motionState == LOW && lastMotionState == HIGH) Serial.println("Motion STOPPED. Timer expired."); digitalWrite(ledPin, LOW); hw416b pir sensor datasheet better

is a widely used PIR (Passive Infrared) motion sensor module, frequently sold as a variant or high-sensitivity alternative to the HC-SR501 . It is designed to detect human or animal movement by sensing changes in infrared radiation. Technical Specifications unsigned long lastMotionTime = 0

If you find your PIR sensor is triggering randomly, the "better" way to handle it isn't just software—it's hardware. const unsigned long MOTION_HOLD_MS = 3000

volatile bool motionDetected = false; unsigned long lastMotionTime = 0; const unsigned long MOTION_HOLD_MS = 3000; // Match sensor's delay