finnaly fixed 'unknown command respond' bug

lib/beewatch/server/__init__.py

@@ -108,7 +108,7 @@ class ConnHandlerBeeWatch(digilib.network.ConnHandlerBase):
                 tb = traceback.format_exc()
                 respond(tb)
         else:
-            respond("Unknown command")
+            self.respond("Unknown command")
         # self.call(
         #     cmd,
         #     respond=self.respond,