#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

const int sensorPin = A0;   // etalon sensor
const int tempSensor2Pin = A1; //o'lchovchi sensor
const int ledPin = 2;       // LED chiroqning pinningizni 2 ga o'rnatamiz
const int buzzerPin = 3;   // Buzzerning pinningizni 13 ga o'rnatamiz

int val, val2;
float R1 = 10000; // Termistorning R1 qiymatini beramiz
float logR2, R2, temp, temp2;
float c1 = 0.001129148; // Steinhart-Hart koeffitsientlari
float c2 = 0.000234125;
float c3 = 0.0000000876741;

// LCDni sozlash
LiquidCrystal_I2C lcd(0x27, 16, 2);  // LCD I2C manzilini va o'lchamini aniqlaymiz

void setup() {
  pinMode(ledPin, OUTPUT);    // LED chiroqni chiqaruvchi soddalashtirish
  pinMode(buzzerPin, OUTPUT); // Buzzer soddalashtirish
  lcd.init();                      // LCDni boshlaymiz 
  lcd.backlight();                 // Fonni yoqamiz
  Serial.begin(9600);   
}

void loop() {
  // etalon harorat sensori
  val = analogRead(sensorPin); // Sensordan qiymat olish
  R2 = R1 * (1023.0 / (float)val - 1.0); // Termistorning rezistansini hisoblaymiz
  logR2 = log(R2);
  temp = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2)); // Haroratni K ga o'tkazamiz
  temp = temp - 273.15; // Haroratni °C ga o'tkazamiz

  // o'lchovchi harorat sensori
  val2 = analogRead(tempSensor2Pin); // Qo'shimcha sensordan qiymat olish
  R2 = R1 * (1023.0 / (float)val2 - 1.0);
  logR2 = log(R2);
  temp2 = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2));
  temp2 = temp2 - 273.15;

  // LCD ekranida ma'lumotlarni ko'rsatish
  lcd.clear();                     
  lcd.setCursor(0, 0);             
  lcd.print("Harorat:");         
  lcd.print(temp2);                 
  lcd.print("C");                
  
  lcd.setCursor(0, 1);
  lcd.print("Etanol:");          
  lcd.print(temp); 
  lcd.print("C");

  // Serial monitor uchun
  Serial.print("Harorat1: ");
  Serial.print(temp);
  Serial.println(" C");

  Serial.print("Harorat2: ");
  Serial.print(temp2);
  Serial.println(" C");
int qiymat=temp2-temp;

  // Etanol kritik qiymatidan ogohlantirish
  if (qiymat>2 && temp2>temp) { // Agar konsentratsiya 50% dan oshsa
    for (int i = 0; i <= 3; i++) {
      digitalWrite(ledPin, HIGH); // LEDni yoqamiz
      tone(buzzerPin, 720, 500); // Buzzer orqali ovoz chiqaramiz
      delay(500);
    }
  } else {
    digitalWrite(ledPin, LOW); // LEDni o'chiramiz
    noTone(buzzerPin);         // Buzzerni o'chiramiz
  }

  delay(1000); // 1 soniya kutish
}