// Include Wire Library for I2C
#include <Wire.h>
// Include NewLiquidCrystal Library for I2C
#include <LiquidCrystal_I2C.h>
// Include EEPROM Library
#include <EEPROM.h>

// Define LCD pinout
const int  en = 2, rw = 1, rs = 0, d4 = 4, d5 = 5, d6 = 6, d7 = 7, bl = 3;

// Define I2C Address - change if reqiuired
const int i2c_addr = 0x27;

LiquidCrystal_I2C lcd(i2c_addr, en, rw, rs, d4, d5, d6, d7, bl, POSITIVE);

const int BUTTON_PIN = 7;
const int RELAY_PIN  = 3;

int counter=1;
int i;
int liter;

void setup() {
  Serial.begin(9600);                // initialize serial
  pinMode(BUTTON_PIN, INPUT_PULLUP); // set arduino pin to input pull-up mode
  pinMode(RELAY_PIN, OUTPUT);        // set arduino pin to output mode
  
  lcd.begin(16, 2);                  // Set display type as 16 char, 2 rows
  lcd.setCursor(0, 0);
    lcd.print("System is ready");
  lcd.setCursor(0, 1);
    lcd.print("Prev Count:");
    counter = EEPROM.read(0);          //get the previously saved value from EEPROM address zero
  lcd.setCursor(14, 1);  
    lcd.print(counter-1);
    }

void loop() {
  int buttonState = digitalRead(BUTTON_PIN); // read new state

  if (buttonState == LOW) {
    digitalWrite(RELAY_PIN, HIGH); // turn on
  }
  else if (buttonState == HIGH) {
    digitalWrite(RELAY_PIN, LOW);  // turn off
    i = counter++;
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Pomp Count:");
    lcd.setCursor(14, 0);
    lcd.print(i);
    lcd.setCursor(0, 1);
    lcd.print("Volume:");
    lcd.setCursor(9, 1);
    liter = (i * 25);
    lcd.print(liter);
    lcd.print(" L");
    lcd.setCursor(15, 1);
    {EEPROM.update(0, counter);  //save the new value to EEPROM address zero
    delay(10000); //10 seconds
    }
  }
}