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

LiquidCrystal_I2C lcd(0x27, 16, 2);

float reading = 0;
float Voltage = 0;
float Voltage_AC = 0;

void setup() {

  pinMode(A1, INPUT);
  lcd.init();
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Hello world...");
  delay(5000);
  lcd.clear();

}

void loop() {
  lcd.clear();
  reading = analogRead(A1);
  Voltage = ((reading * 5.00) / (1023.00));
  Voltage_AC = ((Voltage * 53.65));//(Voltage * 101.38);
  lcd.setCursor(0, 0);
  lcd.print("V= ");
  lcd.print(Voltage);
  lcd.print("V  ");
  lcd.print(reading);
  lcd.setCursor(0, 1);
  lcd.print("V_AC= ");
  lcd.print(Voltage_AC);
  lcd.print("V");
  delay(1000);
}