#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <Servo.h>

const int RELAY_PIN = 13;
const int SERVO_PIN =  8;
const int TRIG_PIN =   7;
const int ECHO_PIN =   6;

/* Keypad setup */
const byte KEYPAD_ROWS = 4;
const byte KEYPAD_COLS = 4;
byte rowPins[KEYPAD_ROWS] = {5, 4, 3, 2};
byte colPins[KEYPAD_COLS] = {A3, A2, A1, A0};
char keys[KEYPAD_ROWS][KEYPAD_COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

// create objects
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, KEYPAD_ROWS, KEYPAD_COLS);
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo lockServo;

int water = 0;

void showStartupMessage() {
  lcd.setCursor(4, 0);
  lcd.print("Welcome!");
  delay(5000);
}

void setup() {
  lcd.init();
  lcd.backlight();
  showStartupMessage();
  lcd.setCursor(0, 0);
  lcd.print("Input volume water");
  water = 0;
}

void loop() {

}