remove recursion

src/mqtt_helper.py

@@ -31,7 +31,7 @@ class MQTT:
         self.host = host
         self.port = port
         self.client_id = client_id
-        self.topic = None
+        self._topic = None
         self.qos = qos
         self.retain = retain
 
@@ -40,15 +40,15 @@ class MQTT:
         Set topic
         :return:
         """
-        return self.topic
+        return self._topic
 
-    def set_topic(self, _topic: str) -> None:
+    def set_topic(self, value: str) -> None:
         """
         Get current topic
-        :param _topic:
+        :param value:
         :return:
         """
-        self.topic = _topic
+        self._topic = value
 
     topic = property(get_topic, set_topic)