#define therm A0
const float BETA = 3950;
void setup() {
pinMode(therm, INPUT);
Serial.begin(9600);
}
void loop() {
int temp = analogRead(therm);
float celsius = 1 / (log(1 / (1023. /temp - 1)) / BETA + 1.0 / 298.15) - 273.15;
Serial.print("temp: ");
Serial.print(celsius);
Serial.println(" ℃");
delay(1000);
}