#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
 
int resval = 0;  // holds the value
int respin = A2; // sensor pin used
//keypad+button
const byte BUTTON = 8; // our button pin
const byte BUTTON2 =10; // our button pin
const byte LED = 11; // LED MULAI
const byte LED1 = 12; // LED PROSES
const byte LED2 = 13; // LED SELESAI
//output buzzer
const int buzzer= 9;  // buzzer
//output relay
const byte Pembangkit = 4;
const byte OFF1 = 5;
const byte valve = 3;
const byte pompa = 2;
unsigned long buttonPushedMillis; // when button was released
unsigned long ledTurnedOnAt; // when led was turned on
unsigned long turnOnDelay = 100; // wait to turn on LED
unsigned long turnOffDelay = 6000; // turn off LED after this time00
bool ledReady = false; // flag for when button is let go
bool ledState = false; // for LED is on or not.

unsigned long buttonPushedMillis2; // when button was released
unsigned long ledTurnedOnAt2; // when led was turned on
unsigned long turnOnDelay2 = 100; // wait to turn on LED
unsigned long turnOffDelay2 = 900000; // turn off LED after this time00
bool ledReady2 = false; // flag for when button is let go
bool ledState2 = false; // for LED is on or not.

void setup() {
  Serial.begin(9600);
  //keypad+button
  pinMode(BUTTON, INPUT_PULLUP);
  pinMode(BUTTON2, INPUT_PULLUP);
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
  pinMode(LED1, OUTPUT);
  digitalWrite(LED1, LOW);
  pinMode(LED2, OUTPUT);
  digitalWrite(LED2, LOW);
  pinMode(buzzer, OUTPUT); 
  //output relay
  pinMode(Pembangkit, OUTPUT);
  //igitalWrite(Pembangkit, LOW);
  pinMode(OFF1, OUTPUT);
  digitalWrite(OFF1, HIGH);
  //  pinMode(OFF2, OUTPUT);
  //  digitalWrite(OFF2, LOW);
  pinMode(valve, OUTPUT);
  digitalWrite(valve, LOW);
  pinMode(pompa, OUTPUT);
  digitalWrite(pompa, LOW);

  // display
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(5, 0);
  lcd.print("ULTRASOUND");
  lcd.setCursor(2, 1);
  lcd.print("CLEANER");
  delay (2000);
  lcd.clear();
}

void loop() {

  //=========================WATER LEVEL======================
  resval = analogRead(respin); //Read data from analog pin and store it to resval variable
  Serial.print("Water Level: ");
  Serial.println( resval);
  if (resval <= 100) {
    Serial.println("Water Level: Empty");
    lcd.setCursor(0, 1);
    lcd.print("Level air:KOSONG");
    //digitalWrite(pompa, HIGH);
  }
  else if (resval > 300 && resval <= 400)
  { Serial.println("Water Level: Medium");
    lcd.setCursor(0, 1);
    lcd.print("Level air:SEDANG");
    //digitalWrite(pompa, HIGH);
  }
  else if (resval > 400) {
    Serial.println("Water Level: High");
    lcd.setCursor(0, 1);
    lcd.print("Level air:PENUH");
    lcd.print(" ");
    //digitalWrite(pompa, LOW);
  }

  //===============================DISPLAY============================
  lcd.setCursor(0, 0);
  lcd.print("KONDISI-");

  //================================================= timer 1==================================
  unsigned long currentMillis = millis();
  // check the button
  if (digitalRead(BUTTON) == LOW) {
    buttonPushedMillis = currentMillis;
    ledReady = true;
    digitalWrite(LED, HIGH);
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    
      if (resval <= 100) {
    Serial.println("Water Level: Empty");
    lcd.setCursor(0, 1);
    lcd.print("Level air:KOSONG");
    digitalWrite(pompa, HIGH);
  }
  else if (resval > 300 && resval <= 400)
  { Serial.println("Water Level: Medium");
    lcd.setCursor(0, 1);
    lcd.print("Level air:SEDANG");
    digitalWrite(pompa, LOW);
      digitalWrite(OFF1, LOW);
  }
  }

  // ================================PROSES1============================
 if ( resval > 400){
  if (ledReady) {
      if ((unsigned long)(currentMillis - buttonPushedMillis) >= turnOnDelay) {
        digitalWrite(Pembangkit, HIGH);
        digitalWrite(LED, LOW);
        digitalWrite(LED1, HIGH);
        digitalWrite(LED2, LOW); 
        digitalWrite(pompa, LOW);
      digitalWrite(OFF1, LOW);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("KONDISI PROSES  ");
        ledState = true;
        ledTurnedOnAt = currentMillis;
        ledReady = false;
      }
  }}

  // ================================SELESAI1============================
  if (ledState) {
    if ((unsigned long)(currentMillis - ledTurnedOnAt) >= turnOffDelay) {
      ledState = false;
      digitalWrite(Pembangkit, LOW);
      digitalWrite(LED, LOW);
      digitalWrite(LED1, LOW);
      digitalWrite(LED2, HIGH);
      digitalWrite(pompa, LOW);
      digitalWrite(valve, HIGH);
      digitalWrite(OFF1, LOW);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("KONDISI SELESAI  ");
   
    for (int i = 0; i < 3; i++) {
    digitalWrite(buzzer, HIGH);  // Menghidupkan LED
    delay(500);  // Menunggu selama 500 milidetik
    digitalWrite(buzzer, LOW);  // Mematikan LED
    delay(500);  // Menunggu selama 500 milidetik sebelum mengulang
  }
  
  while (true) {
    // Tidak melakukan apa-apa setelah 3 kali kedip
  
  }
    }
  }

  //
  //================================================= timer 2==================================
  unsigned long currentMillis2 = millis();
  // check the button
  if (digitalRead(BUTTON2) == LOW) {
    buttonPushedMillis2 = currentMillis2;
    ledReady2 = true;
    digitalWrite(LED, HIGH);
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
if (resval <= 100) {
    Serial.println("Water Level: Empty");
    lcd.setCursor(0, 1);
    lcd.print("Level air:KOSONG");
    digitalWrite(pompa, HIGH);
  }
  else if (resval > 300 && resval <= 400)
  { Serial.println("Water Level: Medium");
    lcd.setCursor(0, 1);
    lcd.print("Level air:SEDANG");
        digitalWrite(pompa, LOW);
      digitalWrite(OFF1, LOW);
  }
  }

  // ================================PROSES============================
 if ( resval > 400){
  if (ledReady2) {
      if ((unsigned long)(currentMillis2 - buttonPushedMillis2) >= turnOnDelay2) {
        digitalWrite(Pembangkit, HIGH);
        digitalWrite(LED, LOW);
        digitalWrite(LED1, HIGH);
        digitalWrite(LED2, LOW); 
         digitalWrite(pompa, LOW);
      digitalWrite(OFF1, LOW);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("KONDISI PROSES  ");
        ledState2 = true;
        ledTurnedOnAt2 = currentMillis2;
        ledReady2 = false;
      }
  }}

  // ================================SELESAI============================
  if (ledState2) {
    if ((unsigned long)(currentMillis2 - ledTurnedOnAt2) >= turnOffDelay2) {
      ledState2 = false;
      digitalWrite(Pembangkit, LOW);
      digitalWrite(LED, LOW);
      digitalWrite(LED1, LOW);
      digitalWrite(LED2, HIGH);
      digitalWrite(pompa, LOW);
      digitalWrite(valve, HIGH);
      digitalWrite(OFF1, LOW);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("KONDISI SELESAI  ");

    for (int i = 0; i < 3; i++) {
    digitalWrite(buzzer, HIGH);  // Menghidupkan LED
    delay(500);  // Menunggu selama 500 milidetik
    digitalWrite(buzzer, LOW);  // Mematikan LED
    delay(500);  // Menunggu selama 500 milidetik sebelum mengulang
  }
  
  while (true) {
    // Tidak melakukan apa-apa setelah 3 kali kedip
  
  }
    }
  }
}