#define ntc_pin A0         // Pin, to which the voltage divider is connected
#define vd_power_pin 2        // 5V for the voltage divider
#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 or the B value of the thermistor (usually 3000-4000) check the datasheet for the accurate value.
#define Rref 10000   //Value of  resistor used for the voltage divider
int samples = 0;   //array to store the samples
void setup(void) {
pinMode(vd_power_pin,OUTPUT);
 Serial.begin(9600);   //initialize serial communication at a baud rate of 9600
}

void loop(void) {
  uint8_t i;
  float average;
  int sample = 0;
  // take voltage readings from the voltage divider
digitalWrite(vd_power_pin,HIGH);
  for (i=0; i< samplingrate; i++) {
   samples += analogRead(ntc_pin);
   delay(10);
  }
digitalWrite(vd_power_pin,LOW);
  average = 0;
  average = samples/ samplingrate;
  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(1000);
}