fix recursion

src/mqtt_helper.py

@@ -42,13 +42,13 @@ class MQTT:
         """
         return self.topic
 
-    def set_topic(self, topic: str) -> None:
+    def set_topic(self, _topic: str) -> None:
         """
         Get current topic
-        :param topic:
+        :param _topic:
         :return:
         """
-        self.topic = topic
+        self.topic = _topic
 
     topic = property(get_topic, set_topic)