A firmware to use an Arduino as a USB-TTL-DMX thingie. Just attach your USB-TTL-Converter to 13 (RX) and 11 (TX). Now use a serial connection from your device to send data using the Arduino's UART.

This is an Arduino project implementing an USB-DMX interface compatible with QLC+. It uses a rewritten port of UDMX for implementing DMX, and VUSB for implementing USB. You don't need experience with ...