// Reference https://docs.wokwi.com/parts/wokwi-ntc-temperature-sensor
#include <math.h>

#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 < sizeof(ledArray) / sizeof(ledArray[0]); i++) {
    pinMode(ledArray[i], OUTPUT);
  }
  pinMode(sensorPin, INPUT); // Initialize sensor pin
}

void loop() {
  // Read the sensor value, calculate the temperature, light up the LEDs
  int analogValue = analogRead(sensorPin);
  
  float voltage = (analogValue / 1023.0) * 5.0;
  float resistance = (1000.0 * voltage) / (5.0 - voltage);
  float temperatureK = 1.0 / (1.0 / 298.15 + (1.0 / BETA) * log(resistance / 1000.0)); // Use BETA value and correct resistance calculation
  float temperatureC = temperatureK - 273.15;
  
  int ledLevel = map(temperatureC, -24, 80, 0, sizeof(ledArray) / sizeof(ledArray[0]));
  
  for (int i = 0; i < sizeof(ledArray) / sizeof(ledArray[0]); i++) {
    digitalWrite(ledArray[i], i < ledLevel ? HIGH : LOW);
  }
  
  delay(100); // Adjust delay for better visualization
}