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

#define DHT_PIN 2        
#define HEATING_PIN 3   
#define COOLING_PIN 4    
#define POWER_SWITCH_PIN 5   
#define BUZZER_PIN 6    
#define POTENTIOMETER_PIN A0  
#define ALARM_RESET_BUTTON 7 
#define LCD_ADDRESS 0x27 

LiquidCrystal_I2C lcd(LCD_ADDRESS, 16, 2);

void setup() {
  pinMode(HEATING_PIN, OUTPUT);
  pinMode(COOLING_PIN, OUTPUT);
  pinMode(POWER_SWITCH_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(ALARM_RESET_BUTTON, INPUT);

  lcd.begin(16, 2);
  lcd.print("Klimatyzator");
}

void loop() {
  
  float temperature0 = analogRead(2);
  float celsius = 1 / (log(1 / (1023. / temperature0 - 1)) / 3950 + 1.0 / 298.15) - 273.15;
  float temperature = analogRead(POTENTIOMETER_PIN);  
  float setTemperature = map(temperature, 0, 1023, 10, 50); 



  if (digitalRead(POWER_SWITCH_PIN) == HIGH) {
    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(celsius);
    lcd.print(" C ");

    lcd.setCursor(0, 0);
    lcd.print("Zadana: ");
    lcd.print(setTemperature);
    lcd.print(" C ");
    if (celsius > setTemperature) {
      digitalWrite(COOLING_PIN, HIGH);
      digitalWrite(HEATING_PIN, LOW);
    } else {
      digitalWrite(COOLING_PIN, LOW);
      digitalWrite(HEATING_PIN, HIGH);
    }

    if (celsius > 45 || celsius < 5) {
      digitalWrite(BUZZER_PIN, HIGH);
    } else {
      digitalWrite(BUZZER_PIN, LOW);
    }
  } else {
    digitalWrite(COOLING_PIN, LOW);
    digitalWrite(HEATING_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);
  }

  if (digitalRead(ALARM_RESET_BUTTON) == HIGH) {
    digitalWrite(BUZZER_PIN, LOW);
  }

  delay(1000);  
}