const float BETA=3950;
void setup() {
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
   int analogval=analogRead(0);
   float celsius = 1 / (log(1 / (1023. / analogval - 1)) / BETA + 1.0 / 298.15) - 273.15;
   Serial.print("TEMP ");
   Serial.println(celsius);
   delay(2000);
}