/**
  Basic NTC Thermistor demo
  https://wokwi.com/arduino/projects/299330254810382858

  Assumes a 10K@25℃ NTC thermistor connected in series with a 10K resistor.

  Copyright (C) 2021, Uri Shaked
*/

const float BETA = 3950; // should match the Beta Coefficient of the thermistor
int potval,i1;
int analogValue,temp1;
float celsius;
void setup() {
  Serial.begin(9600);
  pinMode(4,OUTPUT);
}
 
void loop() {
  analogValue = analogRead(A0);
  potval = analogRead (1);
  potval = map(potval,0,1023,0,100);
  celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  Serial.println(potval);
  delay(1000);
  temp1 = celsius;
  //Serial.println(temp1);
  if (potval>celsius)
  {
    digitalWrite(4, HIGH);
  }
  else
  {
    digitalWrite(4, LOW);
  }
  if (potval - temp1 >10)
  {
    i1 = 255;
  }else
   if (potval -temp1 >5)
   {
     i1 = 175;
    }else
    if(potval -temp1 >3)
    {
      i1 = 75;
    }else
    {
      i1 =0;
    }
    Serial.println(i1);
 
  /*for (i1=0;i1<255;i1++)
  {
    analogWrite(3,i1);
    delay (100);
    Serial.println(i1);
  }*/
}