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How to connect PIR motion sensor using arduino with coding

By Aman kumar
Sat, 23-Nov-2019, 16:50

  1. *
  2. * PIR sensor tester
  3. */
  5. int ledPin = 13; // choose the pin for the LED
  6. int inputPin = 2; // choose the input pin (for PIR sensor)
  7. int pirState = LOW; // we start, assuming no motion detected
  8. int val = 0; // variable for reading the pin status
  10. void setup() {
  11. pinMode(ledPin, OUTPUT); // declare LED as output
  12. pinMode(inputPin, INPUT); // declare sensor as input
  14. Serial.begin(9600);
  15. }
  17. void loop(){
  18. val = digitalRead(inputPin); // read input value
  19. if (val == HIGH) { // check if the input is HIGH
  20. digitalWrite(ledPin, HIGH); // turn LED ON
  21. if (pirState == LOW) {
  22. // we have just turned on
  23. Serial.println("Motion detected!");
  24. // We only want to print on the output change, not state
  25. pirState = HIGH;
  26. }
  27. } else {
  28. digitalWrite(ledPin, LOW); // turn LED OFF
  29. if (pirState == HIGH){
  30. // we have just turned of
  31. Serial.println("Motion ended!");
  32. // We only want to print on the output change, not state
  33. pirState = LOW;
  34. }
  35. }
  36. }

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