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- int ledPin = 13; // choose the pin for the LED
- int inputPin = 2; // choose the input pin (for PIR sensor)
- int pirState = LOW; // we start, assuming no motion detected
- int val = 0; // variable for reading the pin status
- void setup() {
- pinMode(ledPin, OUTPUT); // declare LED as output
- pinMode(inputPin, INPUT); // declare sensor as input
- Serial.begin(9600);
- }
- void loop(){
- val = digitalRead(inputPin); // read input value
- if (val == HIGH) { // check if the input is HIGH
- digitalWrite(ledPin, HIGH); // turn LED ON
- if (pirState == LOW) {
- // we have just turned on
- Serial.println("Motion detected!");
- // We only want to print on the output change, not state
- pirState = HIGH;
- }
- } else {
- digitalWrite(ledPin, LOW); // turn LED OFF
- if (pirState == HIGH){
- // we have just turned of
- Serial.println("Motion ended!");
- // We only want to print on the output change, not state
- pirState = LOW;
- }
- }
- }
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