The Arduino uses a shift register to interact with the keyboard’s 8×10 matrix, and the sketch translates any serial data it receives into the keypresses the clone is expecting.

An Arduino-based Proclaim-compatible MIDI to DMX Adapter (for church lighting) Deleted member 32907 Dec 30, 2017 Jump to latest Follow Reply ...

They use a protocol called Specific Area Message Encoding (SAME) and [Ray Dees] recently published an Arduino library that lets you decode the SAME message packets.

The PowerPro 6 Channel DMX Decoder will be available in mid-December exclusively on EnvironmentalLights.com or by calling 888-880-1880.