Month: April 2019

In ZigBee Cluster Library (ZCL) specifications, there are sometimes confusing points that developers do not quite understand, and I will try in this post to clarify a little bit about those level definitions in ZCL’s most-recent version, v7 (ZigBee document 07-5123 Revision 7).

  First of all, level is something generic. Keep that in mind. It can be light levels, which is often found in lighting systems, but it can also be anything, for example, water level, air pressure level, and etc.

However, as ZigBee is more widely adopted in home automation systems than other systems, where lighting is a key part, level cluster is more often used for connected lighting cases.  That is why starting ZCL v7,  the more general level cluster (cluster id 0x0008, chapter 3.10) derives a “level cluster for lighting” cluster, with the same cluster id 0x0008 (chapter 3.19).

    And I will clarify level definitions for lighting especially.