#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
   
  lcd.init();
  lcd.backlight();
  
  Serial.begin(9600);
  
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("4G version :");

  if (Serial.available() > 0) {
    
    String receivedData = Serial.readStringUntil('\n');
    
    if (receivedData.indexOf("4G Box Ver") != -1) {
    
      int versionStart = receivedData.indexOf("4G Box Ver") + 10;
      
      String version = receivedData.substring(versionStart);
      
      Serial.println("4G Box Version: " + version);

      lcd.setCursor(0, 1);
      lcd.print(version);
      delay(1000);
      
    }
  }
}