stable generating of reverse packet_fields map.

rflink/parser.py

@@ -458,7 +458,7 @@ def packet_events(packet: dict) -> Generator:
     ... }))
     >>> assert {'id': 'newkaku_000001_01', 'command': 'on'} in y
     """
-    field_abbrev = {v: k for k, v in PACKET_FIELDS.items()}
+    field_abbrev = {v: k for k, v in sorted(PACKET_FIELDS.items(), key=lambda x: (x[1], x[0]), reverse=True)}
 
     packet_id = serialize_packet_id(packet)
     events = {f: v for f, v in packet.items() if f in field_abbrev}