const int sensorPin = A0;
float voltage, temperatureC;

void setup() {
  Serial.begin(9600);

  // Step 4: Use internal 1.1V reference (optional)
  // analogReference(INTERNAL); // Uncomment to test internal reference
}

void loop() {
  int adcValue = analogRead(sensorPin);

  // Convert ADC value to voltage (assuming 5V reference)
  voltage = adcValue * (5.0 / 1023.0);

  // LM35 outputs 10mV per °C
  temperatureC = voltage * 100;

  Serial.print("ADC Value: ");
  Serial.print(adcValue);
  Serial.print(" | Voltage: ");
  Serial.print(voltage, 3);
  Serial.print(" V | Temperature: ");
  Serial.print(temperatureC, 1);
  Serial.println(" °C");

  delay(1000);
}