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

void setup() {
  // put your setup code here, to run once:
  lcd.init();
}

void loop() {
  // put your main code here, to run repeatedly:
  double voltage=1.0/2.0;
  lcd.setCursor(0,0);
  lcd.print(voltage);
  delay(1000);
}