#include <Servo.h>
#include <LiquidCrystal_I2C.h>

#define SERVO_PIN 10
#define NTC_PIN A0
#define BETA 3950

LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo servo;

void setup() {
  pinMode(12, INPUT_PULLUP);
  pinMode(13, INPUT_PULLUP);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(NTC_PIN, INPUT);
  lcd.init();
  lcd.backlight();

  servo.attach(SERVO_PIN);
}

void loop() {
  float temp = readCelcius();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(temp);
  lcd.setCursor(0, 1);
  lcd.print("Threshold: 57");

  if (temp > 57) {
    servo.write(0);
  } else {
    servo.write(90);
  }
}

float readCelcius() {
  return 1 / (log(1 / (1023. / analogRead(A0) - 1)) / BETA + 1.0 / 298.15) - 273.15;
}