#define sensorPin A0
#define BETA 3950
#define SERIES_RESISTOR 10000 // 10k ohm series resistor

int ledArray[] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13};

void setup() {
  for (int i = 0; i < 10; i++) {
    pinMode(ledArray[i], OUTPUT); // Initialize LED pins as output
  }
  Serial.begin(9600); // Initialize serial communication for debugging
}

void loop() {
  int analogValue = analogRead(sensorPin);
  float temperature = calculateTemperature(analogValue);

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  displayTemperature(temperature);

  delay(10); 
}

float calculateTemperature(int analogValue) {
  float resistance = SERIES_RESISTOR / (1023.0 / analogValue - 1.0);
  float temperature = 1.0 / (log(resistance / SERIES_RESISTOR) / BETA + 1.0 / 298.15) - 273.15;
  return temperature;
}

void displayTemperature(float temperature) {
  int numLEDs = map(temperature, -24, 80, 0, 10);
  numLEDs = constrain(numLEDs, 0, 10);

  for (int i = 0; i < 10; i++) {
    if (i < numLEDs) {
      digitalWrite(ledArray[i], HIGH); 
    } else {
      digitalWrite(ledArray[i], LOW);  
    }
  }
}