#define LM35_PIN 36

void setup() {
  Serial.begin(115200);
  analogReadResolution(12);
  analogSetPinAttenuation(LM35_PIN, ADC_11db);
}

void loop() {
  int sum = 0;
  for (int i = 0; i < 20; i++) {
    sum += analogRead(LM35_PIN);
    delay(2);
  }

  int adcVal = sum / 20;

  float voltage = adcVal * (3.3 / 4095.0);
  voltage += 0.02;                  // small offset
  float tempC = voltage * 100.0 * 1.45;  // CALIBRATION FIX

  Serial.print("Temperature: ");
  Serial.print(tempC, 1);
  Serial.println(" °C");

  delay(1000);
}