Not as async as possible, and definately needs a future revisit. But
works for now, with acceptable delays, if the newly introduced
tocard_retries parameter of class MFRC522 is used and set to a
reasonable low value.

@@ -0,0 +1,33 @@
+#!/usr/bin/bash

@@ -0,0 +4,4 @@
+
+def uid_to_string(uid: list):
+    uid_string = "0x"
+    for i in uid:

@@ -0,0 +11,4 @@
+
+async def get_tag_uid(reader: MFRC522, poll_interval_ms: int = 50) -> list:
+    while True:
+        reader.init()