WLED Effect DMX mode allows remote control of built-in effects via 15 DMX channels without per-pixel data

WLED’s Effect DMX mode is not a realtime pixel-streaming mode and supports only 1 universe — it uses 15 DMX channels to remotely set WLED’s internal effect engine properties: master dimmer, effect mode ID, speed, intensity, palette ID, effect option, and primary/secondary/tertiary RGB colours. This allows a DMX desk to switch and tweak WLED’s built-in effects without streaming per-pixel data, which drastically reduces network bandwidth. The tradeoff is that effects are computed locally on the WLED device rather than driven by external audio analysis. Effect Segment mode extends this to multi-segment control (15 channels per segment), with a configurable DMX address gap between segments. A breaking change in WLED 0.14.0-b1 changed the Effect mode channel mapping, breaking existing setups.

Examples

A lighting technician sends DMX channel 2 = effect ID 45 (Fire effect), channel 3 = speed 200, channel 4 = intensity 128 over E1.31. WLED runs the fire effect autonomously without any per-pixel data being transmitted.

Assessment

Compare Effect mode to Multiple RGB mode: which uses more network bandwidth? Which allows audio-reactive pixel-level control? When would you choose Effect mode over Multiple RGB?