Blocks has built in support for controlling lighting fixtures based on the Art-Net/DMX512 Control protocol. Controlling single channels and common basic functions is straightforward, and is built into Blocks as standard. For more details, see under "Art-Net/DMX-512 Lighting" in the Blocks manual.

Controlling more advanced fixtures, with numerous controllable parameters and operating modes, can be more challenging. To help keeping things manageable, such complex fixtures can be described by a fixture description file, specifying its function-to-channel mapping.

Read more about how this works, and how you can obtain or create additional fixture definition files, here.