#include <LiquidCrystal_I2C.h>

#define PIN_LED 6
#define PIN_POT A0


//LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
LiquidCrystal_I2C lcd(0x27, 16, 2);

byte l1[8] = {  B00000, B00000, B00000, B00000, B00000, B00000, B00000, B11111,};
byte l2[8] = {  B00000, B00000, B00000, B00000, B00000, B00000, B11111, B11111,};
byte l3[8] = {  B00000, B00000, B00000, B00000, B00000, B11111, B11111, B11111,};
byte l4[8] = {  B00000, B00000, B00000, B00000, B11111, B11111, B11111, B11111,};
byte l5[8] = {  B00000, B00000, B00000, B11111, B11111, B11111, B11111, B11111,};
byte l6[8] = {  B00000, B00000, B11111, B11111, B11111, B11111, B11111, B11111,};
byte l7[8] = {  B00000, B11111, B11111, B11111, B11111, B11111, B11111, B11111,};
byte l8[8] = {  B11111, B11111, B11111, B11111, B11111, B11111, B11111, B11111,};


void setup() {

pinMode(PIN_LED, OUTPUT);
pinMode(PIN_POT, INPUT);
Serial.begin(9600);

  lcd.begin(16, 2); 
  lcd.createChar(0, l1);
  lcd.createChar(1, l2);
  lcd.createChar(2, l3);
  lcd.createChar(3, l4);
  lcd.createChar(4, l5);
  lcd.createChar(5, l6);
  lcd.createChar(6, l7);
  lcd.createChar(7, l8);
    
  lcd.backlight(); 
  lcd.setCursor(0,0);
  
for (byte i= 0; i<8;i++) {
delay(100);
  lcd.write(byte(i));
}delay(100);
  lcd.setCursor(0,1);
  lcd.print("test");
  delay(1000);
  lcd.clear();
}

void loop() {
  static int potWaarde = 0;
  potWaarde = getPotWaarde();
  //Serial.println(potWaarde);
  updateDisplay(potWaarde);
  updateLed(potWaarde);

}

int getPotWaarde(){
  return map(analogRead(PIN_POT),0,1023,0,254);
}
void updateLed(int potWaarde){
  analogWrite(PIN_LED,potWaarde);

}
void updateDisplay(int potWaarde){
  static byte blok;
  //lcd.clear();
    lcd.print(potWaarde);
  delay(100);
  blok = map (potWaarde,0,254,0,16);
  lcd.setCursor(0,1);
  for (int i= 0; i < blok; i++){
    lcd.write(byte(255));
  }
  for (int i= 0; i < 16; i++){
    lcd.write(byte(" "));
  }
}