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

const int AnalogPin = A0;
const int ledPin =  3;
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  pinMode(AnalogPin, INPUT);
  for (int i = 0; i < 1; i++) {
    pinMode(ledPin, OUTPUT);
  }
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.clear();
}

void loop() {
  int A = analogRead(AnalogPin);
  int pwm = map(A, 0, 1023, 0, 255);
  int brightnessPercentage = map(A, 0, 1023, 0, 100);

  for (int i = 0; i < 1; i++) {
    analogWrite(ledPin, pwm);
  }

  lcd.setCursor(0, 0);
  lcd.print("Brightness: ");
  lcd.print(brightnessPercentage);
  lcd.print("%     ");
  delay(500);
}