// 3회 모션센서와 Relay모듈 제어 
#define PIR_PIN 12
#define RELAY_PIN 17

int ledState = LOW;
int pir_val = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  
  pinMode(PIR_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  
}

void loop() {

  pir_val = digitalRead(PIR_PIN);
  if (pir_val == HIGH ) {           // check if the sensor is HIGH
    digitalWrite(RELAY_PIN, HIGH);   // turn LED ON
    delay(100);                // delay 100 milliseconds 
    
    if (ledState == LOW) {
      Serial.println("Motion detected!"); 
      ledState = HIGH;       // update variable state to HIGH
    }
  } else {
      digitalWrite(RELAY_PIN, LOW); // turn LED OFF
      delay(200);             // delay 200 milliseconds 
      
      if (ledState == HIGH){
        Serial.println("Motion stopped!");
        ledState = LOW;       // update variable state to LOW
    }
  }
}