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7.1.2.1 Groups Clarification As Groupcasts are made on a broadcast to all devices for which macRxOnWhenIdle = TRUE, Sleeping end devices will not be able to benefit from the features of the Groups and Scenes server Cluster. For example, a door lock which would typically be a sleeping end device would not be able to receive the datagrams required to commission a scene or change for example, to a night scene. It is therefore not Mandatory but only optional to support the Groups and Scenes Server cluster if the device is a Sleeping end device (even when listed as Mandatory)
