Implement clean exit

aprs_comm.py

@@ -22,9 +22,17 @@ unack_lock = Lock()
 message_counter = 1
 message_lock = threading.Lock()
 
+# Global flag to indicate shutdown
+shutdown_event = threading.Event()
+
 
 JSON_URL = "https://aprs-deviceid.aprsfoundation.org/tocalls.pretty.json"
 
+def shutdown():
+    """Signal the APRS loop to shut down."""
+    print("Shutdown signal received. Stopping APRS communications...")
+    shutdown_event.set()
+
 def fetch_device_data():
     local_file = "tocalls_cache.json"
 
@@ -148,7 +156,11 @@ def start():
     print(f"BBS Callsign: {my_callsign}")
 
     while True:
-        for frame in ki.read(min_frames=1):
+        if shutdown_event.is_set():
+            print("Shutdown event set. Exiting APRS loop.")
+            ki.stop()
+            break
+        for frame in ki.read(min_frames=0):
             try:
                 if config.RAW_PACKET_DISPLAY:
                     print(f"{COLOR_RAW}RAW PACKET:{COLOR_RESET} {frame}")