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

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //Serial.println("Hello, ESP32!");
  LCD.init();
  LCD.backlight();
}

void loop() {
  // put your main code here, to run repeatedly:
  unsigned int a = analogRead(A3);
  float volt = (a*3.3)/4095;
  LCD.clear();
  LCD.print(volt);
  LCD.print(" volt");
  delay(1000); // this speeds up the simulation
}