The Lighting Controller

Yes, I'm a firmware developer developing a light controller.

Your answer precludes the possibility of there being 4 valid channels on the controller, but the user wishes only to set values for 1..3. In this case, 4 will be forced to zero regardless of its current setting.

Ok, so my Artnet light controller I'm developing has 1..4 channels configurable. If a user has a device configured with 4 channels, but only wants to set values for channels 1..3, an extra 0 for channel 4 is automatically added (artnet doesn't support uneven lengths). So the challenge is, how do I k...