#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

float val,val1 = 0;

void setup() {
  lcd.init();                     
  lcd.backlight();                
  }

void loop() {
  val = analogRead(A0);        
  val1 = val/1024*5.0;             
  lcd.setCursor(0,0);            
  lcd.print("ADC value " + String(val,0) + "   " );                 
  lcd.setCursor(0,1);
  lcd.print("U = " + String(val1) + " V ");        
  delay(300);                     
}