#define pinServoMakanan               15
   
#define waktuBukaServo                1000//milidetik
#define servoBuka                     90//derajat
#define servoTutup                    0//derajat
   
#define waktuMakan1                   DateTime(0, 1, 1,  8, 0, 0, 0)//jam 8 pagi
#define waktuMakan2                   DateTime(0, 1, 1, 17, 0, 0, 0)//jam 5 sore
   
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"
#include <ESP32Servo.h>
   
LiquidCrystal_I2C lcd(0x27, 16, 2);//coba juga 0x27
Servo servoMakanIkan;
RTC_DS1307 rtc;
DateTime dt;   
byte detikSebelumnya;
char buf[17];
 
   
void setup() {
  Serial.begin(9600);
  Serial.println("Pemberi pakan ikan otomatis");
     
  servoMakanIkan.attach(pinServoMakanan);
  servoMakanIkan.write(servoTutup);
   
  Wire.begin();


  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  rtc.adjust(DateTime(__DATE__, __TIME__));

   
  Wire.beginTransmission(0x27);
  if (Wire.endTransmission())
  {
    lcd = LiquidCrystal_I2C(0x27, 16, 2);
  }
  lcd.init();   
  lcd.backlight();
   
  lcd.print("Pemberi ");
  lcd.setCursor(0, 1);
  lcd.print("pakan ikan");
  delay(3000);
  lcd.clear();
   
  Serial.println("Sistem mulai");
  sprintf(buf, "Set waktu 1 = %02d:%02d (%lu)", waktuMakan1.hour(), waktuMakan1.minute(), waktuMakan1.get());
  Serial.println(buf);
  sprintf(buf, "Set waktu 2 = %02d:%02d (%lu)", waktuMakan2.hour(), waktuMakan2.minute(), waktuMakan2.get());
  Serial.println(buf);
}
void loop() {
   
  DateTime now = rtc.now();
  if (detikSebelumnya != now.second())
  {
    sprintf(buf, "%02d:%02d:%02d", now.hour(), now.minute(), now.second());
    lcd.setCursor(4, 0);
    lcd.print(buf);
    Serial.print(buf);
   
    detikSebelumnya = now.second();
   
    uint32_t epoch = now.get() % 86400;//hanya jam menit detik
   
    if ((epoch == waktuMakan1.get()) ||
        (epoch == waktuMakan2.get()))
    {
      char buf[17];
      sprintf(buf, "Pakan = %02d:%02d", now.hour(), now.minute());
      lcd.setCursor(0, 1);
      lcd.print(buf);
      Serial.println(buf);
   
      servoMakanIkan.write(servoBuka);
      delay(waktuBukaServo);
      servoMakanIkan.write(servoTutup);
   
    }
  }
}