Update mqttListener.py

apps/nspanel-lovelace-ui/luibackend/mqttListener.py

@@ -32,6 +32,7 @@ class LuiMqttListener(object):
         if msg[0] == "event":
             if msg[1] == "startup":
                 self._updater.request_berry_driver_version()
+                display_firmware_version = int(msg[2])
                 model = None
                 if display_firmware_version >= 23:
                     model = msg[3]