const int led = D6;
const int sensor_pin = A2;
int sensor;
const int threshold = 900;
const int buzzer = D10;

void setup() {
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  sensor = analogRead(sensor_pin);
  Serial.println(sensor);
  
  if (sensor < threshold) {
    digitalWrite(led, HIGH);
    tone(buzzer, 1000); // 1KHz sound
  } else {
    digitalWrite(led, LOW);
    noTone(buzzer);     // Stop sound
  }
  
  delay(100);  // Adjust the delay 
}