#define ntc_pin A0         // Pin,to which the voltage divider is connected
#define nominal_resistance 10000       //Nominal resistance at 25⁰C
#define nominal_temeprature 25   // temperature for nominal resistance (almost always 25⁰ C)
#define samplingrate 5    // Number of samples
#define beta 3950  // The beta coefficient
#define Rref 10000   //Value of  resistor used for the voltage divider
int samples = 0;   //array to store the samples


void setup(void) {
  Serial.begin(9600);   //initialize serial communication at a baud rate of 9600
}

void loop(void) {


  uint8_t i;
  float average;
  samples = 0;

  // take voltage readings from the voltage divider

  for (i = 0; i < samplingrate; i++) {
    samples += analogRead(ntc_pin);
    delay(10);
  }

  average = 0;
  average = samples / samplingrate;
  Serial.println("\n \n");
  Serial.print("ADC readings ");
  Serial.println(average);


  // Calculate NTC resistance

  average = 1023 / average - 1;
  average = Rref / average;
  Serial.print("Thermistor resistance ");
  Serial.println(average);
  float temperature;
  temperature = average / nominal_resistance;     // (R/Ro)
  temperature = log(temperature);                  // ln(R/Ro)
  temperature /= beta;                   // 1/B * ln(R/Ro)
  temperature += 1.0 / (nominal_temeprature + 273.15); // + (1/To)
  temperature = 1.0 / temperature;                 // Invert
  temperature -= 273.15;                         // convert absolute temp to C
  Serial.print("Temperature ");
  Serial.print(temperature);
  Serial.println(" *C");
  delay(2000);


}