#include <SD.h>
#define CS_PIN 2
File root;
int led=15;
int temp=A0;
int slider=A1;
const float BETA = 3950;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  pinMode(temp, INPUT);
  pinMode(slider, INPUT);
  Serial.print("Initializing SD card... ");

  if (!SD.begin(CS_PIN)) {
    Serial.println("Card initialization failed!");
    while (true);
  }

  Serial.println("initialization done.");

  

  // Example of reading file from the card:
  File textFile = SD.open("wokwi.txt", FILE_WRITE);
    
    // Check if the file is available
    if (textFile) {
        // Write some data to the file
        textFile.println("Hello, Wokwi!");
        textFile.println("This is a test.");
        
        // Close the file
        textFile.close();
        Serial.println("Data written to wokwi.txt.");
    } else {
        Serial.println("Error opening wokwi.txt for writing!");
    }
  
}

void loop() {
  int pot_val=analogRead(slider);
  int temp_value=analogRead(temp);
  float celsius = 1 / (log(1 / (1023. / temp_value - 1)) / BETA + 1.0 / 298.15) - 273.15;
  if(celsius>50 || pot_val>900 || pot_val<300)
  {
    digitalWrite(led, HIGH);
  }
  else
  {
    digitalWrite(led,LOW);
  }
  delay(10); // this speeds up the simulation
}