const int sensorPin = A0;
const int ledPin = 9;

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

void loop() {
  int sensorValue = analogRead(sensorPin); // Read analog value from LM35
  float voltage = sensorValue * (5.0 / 1024.0); // Convert to voltage (0–5V)
  float temperature = voltage * 100; // Convert voltage to Celsius

  Serial.print("Temp: ");
  Serial.print(temperature);
  Serial.println(" °C");

  if (temperature > 30) {
    digitalWrite(ledPin, HIGH); // Turn on LED if hot
  } else {
    digitalWrite(ledPin, LOW); // Otherwise, turn it off
  }

  delay(1000); // Wait 1 second between readings
}