diff --git a/src/webee.rs b/src/webee.rs
index 53d9ae0..2698395 100644
--- a/src/webee.rs
+++ b/src/webee.rs
@@ -1,21 +1,27 @@
-use arduino_hal::Usart;
-use arduino_hal::usart::UsartOps;
+use arduino_hal::clock::Clock;
+use arduino_hal::hal::Atmega;
+// use arduino_hal::port;
+// use arduino_hal::port::mode::{Input, Output};
+use arduino_hal::usart::{Usart, UsartOps};
 use arduino_hal::prelude::*;
+
 use embedded_hal::serial::{Read};
 
 mod vector;
 
 pub use vector::Vector;
 
-pub struct Webee<USART, RX, TX> where
-    USART: UsartOps<H, RX, TX>
+pub struct Webee<USART: UsartOps<Atmega, RX, TX>, RX, TX> //where
+// USART: UsartOps<Atmega, port::Pin<Input, RX>, port::Pin<Output, TX>>
 {
     webee: Usart<USART, RX, TX>,
 }
 
 enum SEND_CMD {}
 
-impl<USART, RX, TX> Webee<USART, RX, TX> {
+impl<USART: UsartOps<Atmega, RX, TX>, RX, TX> Webee<USART, RX, TX> // where
+    // USART: UsartOps<Atmega, port::Pin<Input, RX>, port::Pin<Output, TX>>
+{
     const STOP: u8 = 0xFF;
 
     pub fn new(device: USART, rx: RX, tx: TX) -> Self {