#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

bool ledState = false;
bool slowBlink = true;
bool button1State = true;
bool button2State = true;

void setup() {
    pinMode(7, INPUT);
    pinMode(8, INPUT);
    pinMode(9, OUTPUT);
    digitalWrite(7, HIGH);
    digitalWrite(8, HIGH);
    lcd.begin(16, 2);
    lcd.setCursor(0, 0);
    lcd.print("LED: Vypnuta");
    lcd.setCursor(0, 1);
    lcd.print("Rychlost: Pomal.");
}

void loop() {
    // Ovládanie LED
    if (digitalRead(7) == LOW && button1State == true) {
        ledState = !ledState;
        button1State = false;
        
        if (ledState) {
            lcd.setCursor(0, 0);
            lcd.print("LED: Zapnuta ");
        } else {
            lcd.setCursor(0, 0);
            lcd.print("LED: Vypnuta ");
        }
    } else if (digitalRead(7) == HIGH) {
        button1State = true;
    }

    // Zmena rýchlosti blikania
    if (digitalRead(8) == LOW && button2State == true) {
        slowBlink = !slowBlink;
        button2State = false;
        
        if (slowBlink) {
            lcd.setCursor(0, 1);
            lcd.print("Rychlost: Pomal.");
        } else {
            lcd.setCursor(0, 1);
            lcd.print("Rychlost: Rychla");
        }
    } else if (digitalRead(8) == HIGH) {
        button2State = true;
    }

    // Blikanie LED
    if (ledState) {
        digitalWrite(9, HIGH);
        delay(slowBlink ? 500 : 200); // Pomalé alebo rýchle blikanie
        digitalWrite(9, LOW);
        delay(slowBlink ? 500 : 200);
    }
}