#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define high_led0   8
#define high_led1   9
#define poti        A0

unsigned long Pause = 2000;
unsigned long millis_alt = 0;

byte LByte = 0;
byte HByte = 0; 

void setup() 
{
  Serial.begin(9600);
  pinMode(high_led0, OUTPUT);
  pinMode(high_led1, OUTPUT);
  digitalWrite(high_led0, LOW);
  digitalWrite(high_led1, LOW);

  lcd.init();
  lcd.backlight();
}

void loop() 
{
  unsigned int potiwert = analogRead(poti);

  LByte = (potiwert & 0xFF);
  HByte = ((potiwert >> 8) & 0xFF);

  if((millis() - millis_alt) > Pause)
  {
  digitalWrite(high_led0, bitRead(HByte, 0));
  digitalWrite(high_led1, bitRead(HByte, 1));
  lcd.setCursor(0,0);
  lcd.print("Poti");
  lcd.setCursor(6,0);
  lcd.print("H:");
  lcd.print(conv2binString(HByte));
  lcd.setCursor(0,1);
  lcd.print(potiwert);
  lcd.setCursor(6,1);
  lcd.print("L:");
  lcd.print(conv2binString(LByte));
  
  Serial.print("High: ");
  Serial.print(HByte);
  Serial.print(" Low: ");
  Serial.print(LByte);
  Serial.println();

  millis_alt = millis();
  }
}

String conv2binString(byte bVal)
{
  String binWert = "";
  for (int i = 7; i >= 0; i--) 
  {
    if((bitRead(bVal,i) & 1) == 1)
    {
      binWert += "1";
    }
    else
    {
      binWert += "0";
    }
  }
return binWert;
}