Added led worker thread and disk state

main.py

@@ -1,5 +1,6 @@
 from queue import Empty, Queue
 from time import sleep
+from typing import Literal
 import pyudev
 from gpiozero import LED
 from threading import Thread, Event
@@ -17,6 +18,9 @@ class DiskEvent:
     serial: str
 
 
+DiskState = Literal["disconnected", "pairing", "connected"]
+
+
 def diskPollWorker(stopEvent: Event, eventQueue: Queue) -> None:
     context = pyudev.Context()
 
@@ -48,10 +52,26 @@ def diskPollWorker(stopEvent: Event, eventQueue: Queue) -> None:
             return
 
 
+def ledWorker(stopEvent: Event, diskState: DiskState) -> None:
+    yellowCtr: int = 0
+    while not stopEvent.is_set():
+        if diskState == "disconnected":
+            yellow.off()
+        elif diskState == "connected":
+            yellow.on()
+        elif diskState == "pairing":
+            if yellowCtr % 2 == 0:
+                yellow.on()
+            else:
+                yellow.off()
+        sleep(1)
+
+
 def main() -> None:
     try:
         stopEvent = Event()
         diskEventQueue: Queue[DiskEvent] = Queue()
+        diskState: DiskState = "pairing"
 
         diskPollThread = Thread(
             target=diskPollWorker,
@@ -62,6 +82,15 @@ def main() -> None:
 
         diskPollThread.start()
 
+        ledThread = Thread(
+            target=ledWorker,
+            name="led_thread",
+            args=(stopEvent, diskState),
+            daemon=True,
+        )
+
+        ledThread.start()
+
         while True:
             try:
                 event = diskEventQueue.get_nowait()