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

// LCD I2C address (default is 0x27, but this can vary)
LiquidCrystal_I2C lcd(0x27, 16, 2); // 16 columns and 2 rows

// Timer interval in milliseconds (1000 ms = 1 second)
unsigned long lastUpdateTime = 0;
unsigned long updateInterval = 2000; // Update every 2 seconds

void setup() {
  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.setBacklight(1);  // Turn on the backlight

  // Display an initial message
  lcd.setCursor(0, 0);
  lcd.print("Hello, ESP32!");

  lcd.setCursor(0, 1);
  lcd.print("Updating...");
}

void loop() {
  // Get the current time
  unsigned long currentMillis = millis();

  // Check if it's time to update the display
  if (currentMillis - lastUpdateTime >= updateInterval) {
    // Update the last time the display was updated
    lastUpdateTime = currentMillis;

    // Clear the previous content
    lcd.clear();

    // Display a new message
    lcd.setCursor(0, 0);
    lcd.print("Time: ");
    lcd.print(currentMillis / 1000); // Display seconds elapsed

    lcd.setCursor(0, 1);
    lcd.print("Updated every 2s");
  }
}