#define ADC_VREF       3.3  // 3.3V
#define ADC_RESOLUTION 4095.0

#define PIN_TMP36 35 // ESP32 pin GPIO36 (ADC0) connected to LM35

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

void loop() {
  // get the ADC value from the TMP36 temperature sensor
  int adcVal = analogRead(PIN_TMP36);
  // convert the ADC value to voltage
  float voltage = adcVal * (ADC_VREF / ADC_RESOLUTION);
  // convert the voltage to the temperature in Celsius
  float tempC = (voltage - 0.5) * 100;
  // convert the Celsius to Fahrenheit
  float tempF = tempC * 9 / 5 + 32;

  // print the temperature in the Serial Monitor:
  Serial.print("TMP36 Temperature: ");
  Serial.print(tempC);  // print the temperature in Celsius
  Serial.print("°C");
  Serial.print("  ~  ");  // separator between Celsius and Fahrenheit
  Serial.print(tempF);    // print the temperature in Fahrenheit
  Serial.println("°F");

  delay(1000);
}