#include "RTClib.h"
#include "Wire.h"
#include "DHT.h"
#define DHTPIN 6
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR  0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4
LiquidCrystal_I2C lcd(I2C_ADDR,LCD_COLUMNS,LCD_LINES);
RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
int r1=5;
int r2=4;
int r3=2;
int r4=3;
void setup () {
  Serial.begin(115200);
  Serial.println(F("DHTxx test!"));
  dht.begin();
  Serial.begin(115200);
  Serial.println("welcome to my project");
  lcd.init();
  lcd.backlight();
   lcd.setCursor(3,0);
   lcd.print(" WELCOME TO");
   lcd.setCursor(0,1);
   lcd.print(" SMART AGRICULTURE");
   lcd.setCursor(5,2);
    lcd.print(("IRRIGATION"));
   lcd.setCursor(7,3);
   lcd.print("SYSTEM");
   delay(4000);
   lcd.clear();
   pinMode(r1, OUTPUT);
  pinMode(r2, OUTPUT);
  pinMode(r3, OUTPUT);
  pinMode(r4, OUTPUT);
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
}

void loop () {
  DHTSENSOR();
  DateTime now = rtc.now();
  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);
  delay(500);
  /*lcd.setCursor(0,1);
   lcd.print("RELAY1:");
   lcd.setCursor(10,1);
   lcd.print("RELAY2:");
   lcd.setCursor(0,2);
   lcd.print("RELAY3:");
   lcd.setCursor(10,2);
   lcd.print("RELAY4:");*/
   if(now.minute()>=0&&now.minute()<=1)
   {
    Serial.println("relay1 is on");
    lcd.setCursor(0,1);
   lcd.print("RELAY1:on");
   lcd.setCursor(10,1);
   lcd.print("RELAY2:off");
   lcd.setCursor(0,2);
   lcd.print("RELAY3:off");
   lcd.setCursor(10,2);
   lcd.print("RELAY4:off");
   digitalWrite(r1, HIGH);
   }
   else{
    Serial.println("relay1 is off");
    digitalWrite(r1,LOW);
   }
   if(now.minute()>=2&&now.minute()<=3)
   {
    Serial.println("relay2 is on");
    lcd.clear();
    lcd.setCursor(0,1);
   lcd.print("RELAY1:off");
   lcd.setCursor(10,1);
   lcd.print("RELAY2:on");
   lcd.setCursor(0,2);
   lcd.print("RELAY3:off");
   lcd.setCursor(10,2);
   lcd.print("RELAY4:off");
   digitalWrite(r2, HIGH);
   }
   else
   {
     Serial.println("relay2 is off");
    digitalWrite(r2, LOW);
   }
   if(now.minute()>=4&&now.minute()<=5)
   {
    Serial.println("relay3 is on");
    lcd.clear();
    lcd.setCursor(0,1);
   lcd.print("RELAY1:off");
   lcd.setCursor(10,1);
   lcd.print("RELAY2:off");
   lcd.setCursor(0,2);
   lcd.print("RELAY3:on");
   lcd.setCursor(10,2);
   lcd.print("RELAY4:off");
   digitalWrite(r3, HIGH);
   }
   else
   {
     Serial.println("relay3 is off");
    digitalWrite(r3, LOW);
   }
  if(now.minute()>=6&&now.minute()<=7)
   {
    Serial.println("relay4 is on");
    lcd.clear();
    lcd.setCursor(0,1);
   lcd.print("RELAY1:off");
   lcd.setCursor(10,1);
   lcd.print("RELAY2:off");
   lcd.setCursor(0,2);
   lcd.print("RELAY3:off");
   lcd.setCursor(10,2);
   lcd.print("RELAY4:on");
   digitalWrite(r4, HIGH);
   }
   else{
    Serial.println("relay4 is off");
    digitalWrite(r4, LOW);
   }
}
void DHTSENSOR() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%Temperature:"));
  Serial.print(temperature);
  Serial.println(F("°C "));
  delay(1000);
  lcd.setCursor(0,3);
  lcd.print(F("Hu:"));
  lcd.print(humidity);
   lcd.setCursor(8,3);
   lcd.print(F("%Te:"));
    lcd.print(temperature);
  lcd.println(F("°C"));
}