#include <DHT.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>

float max_Temp = 40 ;
float min_Temp = 30;
float max_Humi = 90;
float min_Humi = 70;
float Temp, Humi;

int relay1 = 7;
int relay2 = 8;
int relay3 = 9; 
int relay4 = 10; 

byte sw1 = 2 ;
byte sw2 = 3;
byte sw3 = 4;
byte sw4 = 5;


int time;


RTC_DS1307 rtc;
LiquidCrystal_I2C lcd(0x27, 20, 4);


DHT dht(6, DHT22);


void setup() {
  Serial.begin(9600);
  lcd.begin(20, 4);
  Wire.begin();
  rtc.begin();
  lcd.backlight();
  dht.begin();
  lcd.init();

  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);
  pinMode(relay1, OUTPUT);

  pinMode(sw1, INPUT);
  pinMode(sw2, INPUT);
  pinMode(sw3, INPUT);
  pinMode(sw4, INPUT);

}

void loop() {

  uint32_t currenttime = millis();

  lcd.setCursor(0, 0);
  lcd.print(" dodo");
  ReadTemp();
  ReadTime();

  if (digitalRead(sw1) == 1 && digitalRead(sw2) == 0)
  {
    digitalWrite(relay4, HIGH);
    digitalWrite(relay3, LOW);

    AutoMode();
  }
  else if (digitalRead(sw1) == 0 && digitalRead(sw2) == 1)
  {
    digitalWrite(relay4, LOW);
    digitalWrite(relay3, HIGH);

    ManualMode();
  }
  else
  {
    digitalWrite(relay4, LOW);
    digitalWrite(relay3, LOW);
    digitalWrite(relay1, LOW);
  }

}

void ReadTime() { 

  DateTime now = rtc.now();

  lcd.setCursor(0, 3);
  lcd.print("Time : ");
  lcd.print(now.hour(),DEC);
  lcd.print(':');
  lcd.print(now.minute(),DEC);


}

void ReadTemp() { 
  Temp = dht.readTemperature();  
  Humi = dht.readHumidity(); 
  lcd.setCursor(0, 1);
  lcd.print("Temp : ");
  lcd.print(Temp);
  lcd.setCursor(0, 2);
  lcd.print("Humi : ");
  lcd.print(Humi);

}

void AutoMode() { 
if(digitalRead(sw1)==HIGH && digitalRead(sw2) == LOW){
  digitalWrite(relay1, HIGH);
    digitalWrite(relay2, LOW);
}
  if (Temp > max_Temp && Humi < min_Humi)
  {
    digitalWrite(relay1, HIGH);
    digitalWrite(relay4, HIGH);
  }
  else if ( Temp < min_Temp && Humi > max_Humi)
  {
    digitalWrite(relay1, LOW);
    digitalWrite(relay4, HIGH);
  }
  else if (digitalRead(sw1)==LOW && digitalRead(sw2) == LOW) {
      digitalWrite(relay4, LOW);
    digitalWrite(relay1, LOW);

  }
  


}

void ManualMode() { 

  if (digitalRead(sw3) == HIGH && digitalRead(sw4) == LOW)
  {
    digitalWrite(relay2, HIGH);
    digitalWrite(relay1, LOW);
  }
  else if (digitalRead(sw3) == LOW && digitalRead(sw4) == HIGH)
  {
    digitalWrite(relay2, 1);
    digitalWrite(relay1, LOW);
  }
  else if (digitalRead(sw3)==1 && digitalRead(sw4) == 1) 
{
    digitalWrite(relay4, LOW);
    digitalWrite(relay1,HIGH);
  }
 else if (digitalRead(sw3) == 0 && digitalRead(sw4) == 0)
  {
    digitalWrite(relay2, LOW);
    digitalWrite(relay1, 0);
  }
}