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


#define POT_MIN_MEZ A0
#define POT_HYST A2

#define DHTPIN_GARA 3
#define DHTPIN_VENK 5
#define VENTILATOR 12

//#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
#define DHTTYPE DHT21   // DHT 21 (AM2301)

int vlhkostG;
int vlhkostV;
float teplotaG;
float teplotaV;

bool fanState = false;

float valMin, minVlhkost;
float valHyst , hystereze;

DHT dhtGARAZ(DHTPIN_GARA, DHTTYPE);
DHT dhtVENK(DHTPIN_VENK, DHTTYPE);

// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  Serial.begin(9600);
  pinMode(VENTILATOR, OUTPUT);

  digitalWrite(VENTILATOR, LOW);

  dhtGARAZ.begin();
  dhtVENK.begin();
  
  // initialize the LCD
  lcd.init(); 
  //lcd.init();
  lcd.backlight();
  //zobrazInitHodnoty();
}

void loop() {
  //Serial.print(delkaOsvitVal);
  //Serial.print("   Delka min: ");
  //Serial.println(delkaOsvitMillis);


  vlhkostG = dhtGARAZ.readHumidity();
  teplotaG = dhtGARAZ.readTemperature();

  vlhkostV = dhtVENK.readHumidity();
  teplotaV = dhtVENK.readTemperature();

  valMin = analogRead(POT_MIN_MEZ);
  valHyst = analogRead(POT_HYST);

  minVlhkost = map(valMin, 0, 1023, 30, 70);
  hystereze = map(valHyst, 0, 1023, 1, 5);


  // --- LOGIKA ZAPNUTÍ ---
  bool podminkaZapnuti =
    (vlhkostG > vlhkostV + hystereze) &&
    (vlhkostG > minVlhkost + hystereze);

  // --- LOGIKA VYPNUTÍ ---
  bool podminkaVypnuti =
    (vlhkostG <= vlhkostV) ||
    (vlhkostG <= minVlhkost);

  // --- ŘÍZENÍ VENTILÁTORU ---
  if (podminkaZapnuti) {
    fanState = true;
  }

  if (podminkaVypnuti) {
    fanState = false;
  }

  digitalWrite(VENTILATOR, fanState ? HIGH : LOW);

  Serial.print("Min Mez: ");
  Serial.print(minVlhkost);
  Serial.print("   Hystereze: " );
  Serial.println(hystereze);


  zobrazHodnoty();

  
}



void zobrazHodnoty() {

  lcd.setCursor(0, 0);
  lcd.print("VG ");
  lcd.setCursor(3, 0);
  lcd.print("  ");
  lcd.setCursor(3, 0);
  lcd.print(vlhkostG);
  lcd.setCursor(5, 0);
  lcd.print("%");
  lcd.setCursor(9, 0);
  lcd.print("VV");
  lcd.setCursor(12, 0);
  lcd.print("  ");  
  lcd.setCursor(12, 0);
  lcd.print(vlhkostV);
  lcd.setCursor(14, 0);
  lcd.print("%");  
    
  lcd.setCursor(0, 1);
  lcd.print("TG");
  lcd.setCursor(3, 1);
  lcd.print("    ");
  lcd.setCursor(3, 1);
  lcd.print(teplotaG, 1);  
  lcd.setCursor(7, 1);
  lcd.print((char)223);
  lcd.setCursor(9, 1);
  lcd.print("TV");
  lcd.setCursor(11, 1);
  lcd.print("    ");
  lcd.setCursor(11, 1);
  lcd.print(teplotaV,1);  
  lcd.setCursor(15, 1);
  lcd.print((char)223);
  
  
}