#include <SoftwareSerial.h>
const int rx=1;
const int tx=2;
const int tpin=3;
SoftwareSerial mySerial(rx,tx);
void setup() {
  mySerial.begin(9600);
}

void loop() {
    int t;
    t=analogRead(tpin);
    float tc=calcT(t);
    mySerial.println(tc);
    
}

float calcT(int data) {
  float B=3750;
  float T0=298.15;
  float R0=10000.0;
  float R1=11200.0;
  
  float rr1,t;
  rr1= R1 * data / (1024.0 - data);
  t = 1 / (log(rr1 / R0) / B + (1 / T0));
  return (float)(t - 273.15); 
}