Add delay between registration attempts

src/pairing.rs

@@ -65,12 +65,16 @@ impl PairingManager {
                                       .or_else(|(bridges, i, err)| {
                                           match err {
                                               huey::HueError::LinkButtonNotPressed => {
-                                                  let i = if i + 1 < bridges.len() {
-                                                      i + 1
+                                                  if i + 1 < bridges.len() {
+                                                      run(bridges, i + 1)
                                                   } else {
-                                                      0
-                                                  };
-                                                  run(bridges, i)
+                                                      Box::new(tokio::timer::Delay::new(std::time::Instant::now() + std::time::Duration::from_millis(400))
+                                                               .or_else(|err| {
+                                                                   eprintln!("Timer failed: {:?}", err);
+                                                                   Ok(())
+                                                               })
+                                                               .and_then(|_| run(bridges, 0)))
+                                                  }
                                               },
                                               other_err => {
                                                   Box::new(futures::future::err((bridges, i, other_err)))