//zad2
// include the library code:
#include <LiquidCrystal.h>

// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 8, en = 9, d4 = 4, d5 = 5, d6 = 6, d7 = 7            ;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  lcd.begin(16, 2);
}

void loop() {
  lcd.setCursor(0,0);
  lcd.print(digitalRead(A0));
  lcd.setCursor(0, 1);
  float voltage = analogRead(A0)*(5.0 / 1023.0);
  lcd.print(voltage);
  lcd.print(" V");
  delay(500);
  lcd.clear();
}

//zad3
#include <LiquidCrystal.h>
const int rs = 8, en = 9, d4 = 4, d5 = 5, d6 = 6, d7 = 7            ;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int incomingByte = 0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  while(Serial.available()>0){
      incomingByte = Serial.read();
      lcd.print((char)incomingByte);
      Serial.print(incomingByte);
      Serial.print(' ');
      delay(1000);
    }
    lcd.clear();
}