void setup()
{
  Serial.begin(9600);
}
void loop()
{
  int m=analogRead(0);
  Serial.print(m);
  float vin=m*4.88;
  Serial.print("==>");
  Serial.print(vin);
  Serial.print("mV ==>");
  float tmp=map(m,20,358,-40,125);
  Serial.print(tmp);
  Serial.println("oC");
  
  delay(1000);
}