Page 310 - 최강 아두이노 퍼스트 참고서

// Uses a PIR sensor to detect movement, buzzes a buzzer
// more info here: http://blog.makezine.com/projects/pir-sensor-arduino-alarm/ // email
me, John Park, at jp@jpixl.net // based upon:
// PIR sensor tester by Limor Fried of Adafruit // tone
code by michael@thegrebs.com
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 int pinSpeaker = 10;
//Set up a speaker on a PWM pin (digital 9, 10, or 11)

void setup() {
pinMode(ledPin, OUTPUT); // declare LED as output pinMode(inputPin, INPUT);
// declare sensor as input
pinMode(pinSpeaker, OUTPUT);
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 playTone(300, 160);
delay(150);

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 {

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