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

RTC_DS1307 rtc;
DateTime waktu;
char buffer[20],buffer2[8];
const float BETA = 3950;

LiquidCrystal_I2C lcd(0x27,16 ,2);

const int trigger = 8;
const int echo = 9;
const int pupukA = 7;
const int pupukB = 6;
const int r3 = 5; //pengaduk pupuk
const int r4 = 4; //penyalur air nutrisi 

unsigned long r3StartTime = 0;
unsigned long r4StartTime = 0;

void setup() {
  rtc.begin();
  lcd.init();
  lcd.backlight();
  // lcd.setCursor(0,0);

  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(pupukA, OUTPUT);
  pinMode(pupukB, OUTPUT);
  pinMode(r3, OUTPUT);
  pinMode(r4, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  DateTime now=rtc.now();
  lcd.setCursor(0,0); lcd.print("DATE: ");
  lcd.print(now.year()); lcd.print("/"); lcd.print(now.month()); lcd.print("/"); lcd.print(now.day());
  lcd.setCursor(0,1); lcd.print("TIME: ");
  lcd.print(now.hour()); lcd.print(":"); lcd.print(now.minute()); lcd.print(":"); lcd.print(now.second());
  lcd.print(buffer);

  digitalWrite(trigger, LOW);
  delayMicroseconds(5);
  digitalWrite(trigger, HIGH);
  delayMicroseconds(13);
  digitalWrite(trigger, LOW);
  long duration = pulseIn(echo, HIGH);
  long kedalaman = (duration * 0.0343) / 2;

  if (kedalaman < 10) {
    digitalWrite(pupukA, HIGH);
    digitalWrite(pupukB, HIGH);
  } else if (kedalaman > 10) {
    digitalWrite(pupukB, LOW);
    digitalWrite(pupukA, LOW);
  }

  int r1State = digitalRead(pupukA);
  int r2State = digitalRead(pupukB);

  if (r1State == HIGH && r2State == HIGH) {
    delay(1000);
    if (r3StartTime == 1000) {
      r3StartTime = millis();
    }

    if (millis() - r3StartTime >= 0) {
      digitalWrite(r3, HIGH);
    }
  } else {
    digitalWrite(r3, LOW);
    r3StartTime = 0;
  }

  int r3State = digitalRead(r3);
  if (r3State == LOW) {
    if (r4StartTime == 0) {
      r4StartTime = millis();
    }

    if (millis() - r4StartTime >= 4000) {
      digitalWrite(r4, LOW);
      r4StartTime = 0;
    } else {
      delay(1000);
      digitalWrite(r4, HIGH);
    }
  } else {
    digitalWrite(r4, LOW);
    r4StartTime = 0;
  }
}