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

#define DHTPIN 18
#define DHTTYPE DHT22

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);
RTC_DS1307 rtc;

int relay = 13;
int vr = 32;

void setup() {
  Serial.begin(9600);

  lcd.init();  // เริ่มต้นจอแอลซีดี
  lcd.backlight();

  Serial.println(F("DHTxx test!"));
  dht.begin();
  pinMode(relay, OUTPUT);

  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1)
      ;
  }
  if (!rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
}

void loop() {
  float h = dht.readHumidity();

  int val = analogRead(vr);
  float voltage = val * 3.3 / 4096;

  DateTime now = rtc.now();
  int currentSecond = now.second();


  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print("%");

  lcd.setCursor(0, 1);
  lcd.print("Voltage: ");
  lcd.print(voltage);
  lcd.print("V");


  if (h < 40 && voltage > 2.8) {
    if (now.hour() == 11 && now.minute() == 59 && now.second() == 0) {
      digitalWrite(relay, 1);
    } else if (now.hour() == 11 && now.minute() == 59 && now.second() == 15) {
      digitalWrite(relay, 0);
    }
  } else {
    digitalWrite(relay, 0);
    delay(10);
  }

  delay(500);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.print(now.second(), DEC);
  lcd.println();

  lcd.setCursor(0, 1);
  lcd.print(digitalRead(relay));
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("%, Voltage: ");
  Serial.print(voltage);
  Serial.print("V, Relay: ");
  Serial.println(digitalRead(relay));

  delay(1000);  // รอ 1 วินาที
}