/**
  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
const int LED_RED = 14; //RED LED
const int LED_YELLOW = 27; //YELLOW LED
const int LED_GREEN = 26; //GREEN LED
int analogValue = 0; //FOR THE INPUT VALUE


void setup() {
  Serial.begin(9600);
  analogReadResolution(10);
  pinMode(15,INPUT);
  pinMode(LED_RED,OUTPUT); //RED LED
  pinMode(LED_YELLOW,OUTPUT); //YELLOW LED
  pinMode(LED_GREEN,OUTPUT); //GREEN LED

}
void loop() {
  int analogValue = analogRead(15);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  if(45<celsius){
    digitalWrite(LED_YELLOW, LOW);
    digitalWrite(LED_GREEN, LOW); 
    digitalWrite(LED_RED, HIGH);
  }else if  (celsius<=30)
  {
    digitalWrite(LED_GREEN, HIGH); 
    digitalWrite(LED_YELLOW, LOW); 
    digitalWrite(LED_RED, LOW); 

  }else{
    digitalWrite(LED_RED, LOW);
    digitalWrite(LED_YELLOW, HIGH); 
    digitalWrite(LED_GREEN, LOW);
}
  delay(100);
}