read_device_id() fails to return a value

[ryanfobel]

This bug seems to have been introduced in commit 9b74852285c4314fc1fe04b5021c3480c2e1c26a where a yield statement was converted to a return statement:

-    yield asyncio.From(asyncio.wait_for(_read_device_id(**kwargs),
-                                        timeout=timeout))
+    return asyncio.wait_for(_read_device_id(**kwargs), timeout=timeout)

Reverting this change should fix the issue.