#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  lcd.begin(16, 2);
  pinMode(A0, INPUT);
  Serial.begin(115200);
}

void loop() {
  //lcd.clear();
  int sensorValue = analogRead(A0);
  float voltage = sensorValue*(5.0/1023);
  lcd.setCursor(0, 0);
  lcd.print("voltage:");
  lcd.setCursor(9,0);
  lcd.println(voltage);
  lcd.setCursor(13,0);
  lcd.println("v");
  Serial.println(voltage);
  delay(10);
}