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

#define DHTPIN 27     
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE);

RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };

LiquidCrystal_I2C lcd(0x27, 20, 4);

int vr = 32;
int relay = 13;
String relaystate; 

void setup() {
  pinMode(relay, OUTPUT);

  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));

  dht.begin();

  lcd.init();
  lcd.backlight();

#ifndef ESP8266
  while (!Serial)
    ; 
#endif

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }

  if (!rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

void loop() {
  DateTime now = rtc.now();

  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;
  }

  int val = analogRead(vr);
  int percent = map(val,0,4095,0,100);

  if(h>50 && percent>50){
    if (now.second() % 15 == 0) {
      digitalWrite(relay, HIGH);
      relaystate = "On";
    } else if (now.second() % 5 == 0) {
      digitalWrite(relay, LOW);
      relaystate = "Off";
    }
  }
  else{
    digitalWrite(relay, LOW);
    relaystate = "Off";
  }

  Serial.print("Humidity:");
  Serial.print(h);
  Serial.print(" ");
  Serial.print("Percen:");
  Serial.print(percent);
  Serial.print(" ");
  Serial.print("Time:");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.print(" ");
  Serial.println(relaystate);

  lcd.setCursor(0, 0);
  lcd.print("H:");
  lcd.print(h);
  lcd.setCursor(9, 0);
  lcd.print("VR:");
  lcd.print(percent);
  lcd.setCursor(0, 1);
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  lcd.setCursor(9, 1);
  lcd.print(relaystate);
  delay(1000);
  lcd.clear();
}