Software
All parameters are optional. They all have a defined default value.
The Art-Net configuration is stored on the sdcard in the file "artnet.txt".
Example:
output=spi
The WS28xx configuration is stored on the sdcard in the file "devices.txt".
Example:
led_type=WS2812B
led_count=144
Hardware
WS28xx
Ethernet version using the Raspberry Pi GPIO header
Please bear in mind that you can just drive a few RGB led's from the Raspberry Pi power supply.See here for more technical details.
OLED (display 128 x 64 I2C) Wifi version only.
Wifi version or using the BitWizard Raspberry Pi Serial BoB board
SPI connector details can be found here.