const float BETA = 3950; 
void setup() {
  Serial.begin(9600);
  analogReadResolution(10);
}
void loop() {
  int analogVal = analogRead(34);
  float celsius = 1 / (log(1 / (1023. / analogVal - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  delay(1000);
}