#include "RTClib.h"
#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define DHTPIN 6 
#define DHTTYPE DHT22
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
String data;
DHT dht(DHTPIN, DHTTYPE);
int relay1=2;
int relay2=3;
int relay3=4;
int relay4=5;
RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

void setup () {
  Serial.begin(115200);
   lcd.init();
  lcd.backlight();
  lcd.setCursor(3,0);
  lcd.print("welcome to");
  lcd.setCursor(2,1);
  lcd.print("SMART FARMING");
  delay(4000);
  Serial.println(F("DHTxx test!"));
  dht.begin();
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);
  Serial.println("welcome to my project");
  delay(500);
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  lcd.clear();
  
  
}

void loop () {
  
  DateTime now = rtc.now();
  
  Serial.print("Current time: ");
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();
  Serial.println();
  delay(3000);
  lcd.setCursor(3,0);
  lcd.print("Time:");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);



  if((now.second()> 1) && (now.second()<10))
  {
  lcd.setCursor(0,1);
  lcd.print("Relay1:ON");
   Serial.println("relay1 is on");
   digitalWrite(relay1, HIGH);
  }
  else
  {
    lcd.setCursor(0,1);
  lcd.print("Relay1:OFF");
   Serial.println("relay1 is on");
   digitalWrite(relay1, LOW);
    
  }
  if((now.second()> 10) && (now.second()<20))
  {
  lcd.setCursor(10,1);
  lcd.print("Relay2:ON");
   Serial.println("relay2 is on");
   digitalWrite(relay2, HIGH);
  }
  else
  {
    lcd.setCursor(10,1);
  lcd.print("Relay2:OFF");
   Serial.println("relay2 is off");
   digitalWrite(relay2, LOW);
    
  }
  if((now.second()> 20) && (now.second()<30))
  {
  lcd.setCursor(0,2);
  lcd.print("Relay3:ON");
   Serial.println("relay3 is on");
   digitalWrite(relay3, HIGH);
  }
  else
  {
    lcd.setCursor(0,2);
  lcd.print("Relay3:OFF");
   Serial.println("relay3 is off");
   digitalWrite(relay3, LOW);
    
  }
  if((now.second()> 30) && (now.second()<40))
  {
  lcd.setCursor(10,2);
  lcd.print("Relay4:ON");
   Serial.println("relay4 is on");
   digitalWrite(relay4, HIGH);
  }
  else
  {
    lcd.setCursor(0,1);
  lcd.print("Relay4:OFF");
   Serial.println("relay4 is off");
   digitalWrite(relay4, LOW);
    
  }
  
  // Wait a few seconds between measurements.
  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
 
}
void relay()
{
  }