diff --git a/2sem_uart_flow_ctrl/src/bin/main.rs b/2sem_uart_flow_ctrl/src/bin/main.rs
index 4170815..0257bc8 100644
--- a/2sem_uart_flow_ctrl/src/bin/main.rs
+++ b/2sem_uart_flow_ctrl/src/bin/main.rs
@@ -3,65 +3,108 @@
 #![no_main]
 
 use defmt::*;
-use embassy_stm32::usart::{Config, Uart};
+use core::sync::atomic::{AtomicBool, Ordering};
+use embassy_executor::Spawner;
+use embassy_stm32::usart::{Config, Uart, UartRx, InterruptHandler};
+use embassy_stm32::peripherals::USART1;
+use embassy_stm32::bind_interrupts;
 use embassy_time::{Duration, Timer};
 use embassy_sync::channel::Channel;
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 
 use {defmt_rtt as _, panic_probe as _};
 
-static PIPE: Channel<CriticalSectionRawMutex, u8, 64> = Channel::new();
+bind_interrupts!(struct Irqs {
+    USART1 => InterruptHandler<USART1>;
+});
 
-#[cortex_m_rt::entry]
-fn main() -> ! {
+static PIPE: Channel<CriticalSectionRawMutex, u8, 64> = Channel::new();
+static SEND_ALLOWED: AtomicBool = AtomicBool::new(true);
+static REC_ALLOWED: AtomicBool = AtomicBool::new(true);
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
     info!("tititititi");
 
     let p = embassy_stm32::init(Default::default());
 
     let config = Config::default();
-    let mut usart = Uart::new_blocking(p.USART1, p.PA10, p.PA9, config).unwrap();
+    let usart = Uart::new(
+        p.USART1,
+        p.PA10,
+        p.PA9,
+        Irqs,
+        p.GPDMA1_CH0, // TX DMA
+        p.GPDMA1_CH1, // RX DMA
+        config,
+    ).unwrap();
+    let (mut tx, rx) = usart.split();
+    spawner.spawn(rx_task(rx)).unwrap();
+    spawner.spawn(toggle_rec_task()).unwrap();
 
     let sender = PIPE.sender();
     let receiver = PIPE.receiver();
 
     info!("starting echo");
 
-    let mut buf = [0u8; 1];
-    let mut send_allowed: bool = true;
-    let mut rec_allowed: bool = true;
     let data = b"filip\r\n";
-    let start_time = embassy_time::Instant::now();
+    let idle = &[0x13u8];
 
     loop {
-        rec_allowed = (start_time.elapsed().as_secs() / 2) % 2 == 0;
-        if rec_allowed == true {
-            if usart.blocking_read(&mut buf).is_ok() {
-                let byte = buf[0];
-                match byte {
-                    0x11 => {
-                        send_allowed = true;
-                        info!("Vysielanie povolené");
-                    }
-                    0x13 => {
-                        send_allowed = false;
-                        info!("Vysielanie zakázané");
-                    }
-                    _ => {
-                    }
-                }
-            }
-            if send_allowed {
+        // rec_allowed = (start_time.elapsed().as_secs() / 2) % 2 == 0;
+        let current_send_allowed = SEND_ALLOWED.load(Ordering::Relaxed);
+        let current_rec_allowed = REC_ALLOWED.load(Ordering::Relaxed);
+        if current_rec_allowed == true {
+            if current_send_allowed {
                 if let Ok(stored_byte) = receiver.try_receive() {
-                    unwrap!(usart.blocking_write(&[stored_byte]));
+                    let _ = tx.write(&[stored_byte]).await;
                 } else {
-                    unwrap!(usart.blocking_write(data));
+                    let _ = tx.write(data).await;
                 }
             } else {
                 for b in data {
                     let _ = sender.try_send(*b);
                 }
             }
+        } else {
+            let _ = tx.write(idle).await;
         }
         let _ = Timer::after(Duration::from_millis(100));
     }
 }
+
+#[embassy_executor::task]
+async fn rx_task(mut rx: UartRx<'static, embassy_stm32::mode::Async>) {
+    let mut buf = [0u8; 1];
+    loop {
+        if rx.read(&mut buf).await.is_ok() {
+            match buf[0] {
+                0x11 => {
+                    SEND_ALLOWED.store(true, Ordering::Relaxed);
+                    info!("Vysielanie povolené");
+                }
+                0x13 => {
+                    SEND_ALLOWED.store(false, Ordering::Relaxed);
+                    info!("Vysielanie zakázané");
+                }
+                _ => {}
+            }
+        }
+    }
+}
+
+#[embassy_executor::task]
+async fn toggle_rec_task() {
+    loop {
+        Timer::after(Duration::from_secs(2)).await;
+        // Načítame aktuálnu hodnotu a uložíme jej opak
+        let current = REC_ALLOWED.load(Ordering::Relaxed);
+        REC_ALLOWED.store(!current, Ordering::Relaxed);
+
+        if !current {
+            info!("REC_ALLOWED: true");
+        } else {
+            info!("REC_ALLOWED: false");
+        }
+    }
+}