json_attributes_topic
(string)(Optional)
The MQTT topic subscribed to receive a JSON dictionary payload and then set as sensor attributes. Usage example can be found in [MQTT sensor](https://www.home-assistant.io/integrations/sensor.mqtt/#json-attributes-topic-configuration) documentation.
So I’m guessing you can fill in the attributes topic, then publish all random attributes to said topic.
Hello,
I give up , because, as i understood, i needed to make a json template configuration file , and if this file does not exist, mqtt discovery failed with unknow attribut .
I wait for more understanding explanation about that.
Best regards.