diff --git a/src/main.rs b/src/main.rs
index 2bae062..b4c3fda 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -21,10 +21,10 @@ async fn main(_spawner: Spawner) -> ! {
     let p = hal::init(Default::default());
 
     let mut uart_conf = usart::Config::default();
-    uart_conf.baudrate = 115200;
-    //let mut uart_rx = usart::UartRx::new(p.USART1, Irqs, p.PD6, p.DMA1_CH5, uart_conf).unwrap();
-    let mut uart_rx = usart::UartRx::new_blocking(p.USART1, p.PD6, uart_conf).unwrap();
+    uart_conf.baudrate = 19200;
+    let mut uart = usart::Uart::new_blocking(p.USART1, p.PD5, p.PD6, uart_conf).unwrap();
 
+    uart.blocking_write(b"ready!\r\n").unwrap();
 
     let pin_cw = PwmPin::new_ch3::<0>(p.PC3);
     let pin_ww = PwmPin::new_ch4::<0>(p.PC4);
@@ -50,13 +50,15 @@ async fn main(_spawner: Spawner) -> ! {
 
     println!("hello :)");
 
-    let mut buffer = [0u8; 32];
+    let mut buffer = [0u8; 8];
     loop {
-        match uart_rx.blocking_read(&mut buffer) {
+        uart.blocking_write(b"hi!\r\n").unwrap();
+        match uart.blocking_read(&mut buffer) {
             Ok(()) => {
-                println!("received something");
+                println!("received {:#x} {:#x} {:#x} {:#x}  {:#x} {:#x} {:#x} {:#x}", buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5], buffer[6], buffer[7]);
             }
             Err(_e) => {
+                println!("received nothing, {:?}", _e);
             }
         }
     }