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

// Initialize the LCD with I2C address 0x27 (common for many I2C LCDs)
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
    // Initialize the LCD
    lcd.init();
    lcd.backlight(); // Turn on the backlight

    // Display text
    lcd.setCursor(0, 0);
    lcd.print("");
    lcd.setCursor(0, 1);
    lcd.print("LCD I2C Working!");
}

void loop() {
    // Scroll text as an example
    lcd.setCursor(0, 1);
    lcd.print("   WATER LEVEL!   ");
    delay(1000);
    lcd.setCursor(0, 1);
    lcd.print("ESP32 + LCD   ");
    delay(1000);
}
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <NewPing.h>

// LCD setup
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the I2C address if necessary

// HC-SR04 setup
const int trigPin = 5;
const int echoPin = 18;
const int maxDistance = 200; // Maximum distance to measure (in cm)
NewPing sonar(trigPin, echoPin, maxDistance);

// Buzzer and LED setup
const int buzzerPin = 23;
const int ledPin = 19;

void setup() {
  // Initialize LCD
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Distance:");

  // Initialize Buzzer and LED
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  digitalWrite(buzzerPin, LOW);
  digitalWrite(ledPin, LOW);
}

void loop() {
  delay(50); // Wait for sensor to stabilize
  unsigned int uS = sonar.ping();
  float distance = uS / US_ROUNDTRIP_CM;

  // Display distance on LCD
  lcd.setCursor(0, 1);
  lcd.print("                "); // Clear previous readings
  lcd.setCursor(0, 1);
  lcd.print(distance);
  lcd.print(" cm");

  // Control Buzzer and LED based on distance
  if (distance < 10) {
    digitalWrite(buzzerPin, HIGH);
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(buzzerPin, LOW);
    digitalWrite(ledPin, LOW);
  }

  delay(500); // Update every 500 milliseconds
}