i'd say avarage monday, but its chewsday

xrd.py

@@ -325,7 +325,10 @@ def run_server():
                     conn.sendall(f"M{tef.modulation}\n".encode())
 
                 while True:
-                    readable, _, _ = select.select([conn], [], [], 0.03)
+                    try:
+                        if conn.fileno() == -1: break
+                        readable, _, _ = select.select([conn], [], [], 0.03)
+                    except (ValueError, OSError): break
                     if readable:
                         data = conn.recv(256)
                         if not data: break