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+---
+author: Jan Bouwhuis
+authorURL: https://twitter.com/jbouwh
+title: The naming of MQTT entities changes to correspond with HA guidelines
+---
+
+The way MQTT entities are named and how device configuration can be shared between discovered entities has changed
+
+### Sharing of device configuration
+
+Discovered MQTT entities can share device configuration, meaning one entity can include the full device configuration and other entities can link to that device by only setting mandatory fields.
+The mandatory fields were previously limited to at least one of `connection` and `identifiers`, but has now been extended to at least one of `connection` and `identifiers` as well as the `name`.
+
+### Naming of MQTT entities
+
+Naming of MQTT entities has been changed to be aligned with the [entity naming guidelines](https://developers.home-assistant.io/docs/core/entity/#entity-naming):
+
+- The `has_entity_name` entity will be set to `True` on all MQTT entities
+- Unnamed `binary_sensor`, `button`, `number` and `sensor` entities will now be named by their device class instead of being named `MQTT binary sensor" etc.
+- It's now allowed to set an MQTT entity's name to `None` to mark it as the main feature of a device