#include <LiquidCrystal_I2C.h>

const int LED = 2;
const int LED2 = 5;
const int BUTTON = 3;
const int POT = A3;

int adcWert = 0;  //Variable für Speichern adcWert
int pwmWert = 0; 

LiquidCrystal_I2C lcd(0x27,20,4); //LCD-Display 20 Spalten, 4 Zeilen


void setup() {
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT_PULLUP);
  lcd.init();
  lcd.backlight();
}

void loop() {
if(digitalRead(BUTTON)==LOW){
  digitalWrite(LED, HIGH);
}
else{
  digitalWrite (LED, LOW);
}
adcWert = analogRead(POT);
lcd.setCursor(0,0);
lcd.print("ADC Wert:");
lcd.print(adcWert);
lcd.print("     ");

pwmWert = map(adcWert, 0, 1023, 0, 255);

lcd.setCursor(0,1);
lcd.print("PWM Wert:");
lcd.print(pwmWert);
lcd.print("     ");

analogWrite(LED2, pwmWert);
}