// Reference https://docs.wokwi.com/parts/wokwi-ntc-temperature-sensor

#define sensorPin A0
#define BETA 3950

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

void setup() {
    // initialize LEDs and sensor pin
    for (int i = 0; i < 10; i++) {
      pinMode(ledArray[i], OUTPUT);
      digitalWrite(ledArray[i], LOW);   // Start with LED OFF
    }
}

void loop() {
  // Read the sensor value , calculate the temperature, light up the leds
  int analogValue = analogRead(sensorPin);

  // Convert analog value to temprature in Celsius using BETA foumula
  float tempC = 1 / (log(1.0 * (1023 - analogValue) / analogValue) / BETA + 1.0 / 298.15) -273.15;

  // Map temperature from -24'C to 80'C into 0-10 LED levels
  int ledCount = map(tempC, -24, 80, 0, 10);

  // Clamp ledCount to valid range
  ledCount = constrain(ledCount, 0, 10);

  // Light up LED according to temperature levle
  for(int i = 0; i < 10; i++) {
    if (i < ledCount){
      digitalWrite(ledArray[i], HIGH);
    } 
    else {
      digitalWrite(ledArray[i], LOW);
    }
  }
  delay(10); // this speeds up the simulation
}