#include <Wire.h>  // I2C library
#include <LiquidCrystal_I2C.h>  // LCD I2C library

// Define LCDs with different I2C addresses
LiquidCrystal_I2C lcd1(0x27, 16, 2);  // LCD 1 at address 0x27
LiquidCrystal_I2C lcd2(0x3F, 16, 2);  // LCD 2 at address 0x3F
LiquidCrystal_I2C lcd3(0x20, 16, 2);  // LCD 3 at address 0x20

String message = "This is a scrolling message";
int scrollSpeed = 300;  // Scrolling speed (milliseconds)

void setup() {
  Wire.begin();  // Initialize I2C communication
  Serial.begin(9600);  // Begin Serial for debugging

  // Initialize each LCD with columns and rows
  lcd1.begin(16, 2);
  lcd2.begin(16, 2);
  lcd3.begin(16, 2);

  // Turn on the backlight for each LCD
  lcd1.backlight();
  lcd2.backlight();
  lcd3.backlight();

  // Clear each LCD
  lcd1.clear();
  lcd2.clear();
  lcd3.clear();

  Serial.println("LCDs initialized and ready.");
}

void loop() {
  // Scroll the message through the three LCDs
  for (int pos = 0; pos < message.length() + 32; pos++) {
    // Clear the LCDs before updating
    lcd1.clear();
    lcd2.clear();
    lcd3.clear();

    // Display segments on each LCD based on the current position
    if (pos < message.length()) {
      lcd3.setCursor(0, 1);
      lcd3.print(message.substring(pos, pos + 16));  // Display on row 1 of LCD 3
    }

    if (pos >= 16 && pos < message.length() + 16) {
      lcd3.setCursor(0, 0);
      lcd3.print(message.substring(pos - 16, pos));  // Display on row 0 of LCD 3
    }

    if (pos >= 32) {
      lcd2.setCursor(0, 1);
      lcd2.print(message.substring(pos - 32, pos - 16));  // Display on row 1 of LCD 2
    }

    if (pos >= 48) {
      lcd2.setCursor(0, 0);
      lcd2.print(message.substring(pos - 48, pos - 32));  // Display on row 0 of LCD 2
    }

    if (pos >= 64) {
      lcd1.setCursor(0, 1);
      lcd1.print(message.substring(pos - 64, pos - 48));  // Display on row 1 of LCD 1
    }

    if (pos >= 80) {
      lcd1.setCursor(0, 0);
      lcd1.print(message.substring(pos - 80, pos - 64));  // Display on row 0 of LCD 1
    }

    // Debug output
    Serial.print("Current scroll position: ");
    Serial.println(pos);

    delay(scrollSpeed);  // Delay for scroll effect
  }

  Serial.println("Message scrolling completed, restarting...");
}