Hardware
DMX Node uses Art-Net over Wi-Fi. A hardware Art-Net node is required to produce a physical DMX signal.
Your Phone → Wi-Fi → Art-Net Node → DMX cable → FixturesArt-Net Node
Any Art-Net-compatible node that accepts UDP Art-Net packets and outputs DMX512 will work with DMX Node.
App Configuration
Add your Art-Net node in Settings: give it a name, enter its IP address, and configure which universe each output port maps to.