// Reference https://docs.wokwi.com/parts/wokwi-ntc-temperature-sensor
// Constants
const int sensorPin = A0;  // Analog input pin for temperature sensor
const int numLeds = 10;    // Number of LEDs in the array
const int ledPins[numLeds] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13}; // Digital output pins for LEDs

void setup() {
  // Initialize LED pins as outputs
  for (int i = 0; i < numLeds; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  // Read analog input from temperature sensor
  int sensorValue = analogRead(sensorPin);

  // Convert analog reading to temperature in Celsius
  float voltage = sensorValue * (5.0 / 1023.0);
  float resistance = (5.0 * 10000.0 / voltage) - 10000.0;
  float temperature = 1.0 / (log(resistance / 10000.0) / 3977.0 + (1.0 / 298.15)) - 273.15;

  // Map temperature to LED levels
  int level = map(temperature, -24, 80, 0, numLeds);

  // Illuminate LEDs according to the mapped level
  for (int i = 0; i < numLeds; i++) {
    digitalWrite(ledPins[i], i < level ? HIGH : LOW);
  }
}