Support for the DMX USB Pro Mk2

[SavinaRoja]

Objective

Add support for the DMX USB Pro Mk2

Details

I have recently had a request to support the Pro Mk2. This device has the cool feature of allowing simultaneous interaction with two DMX universes of 512 channels over just the one USB port.

After some perusal of the specification for the Mk2, it looks straightforward. The Mk2 is fairly backwards compatible with the Pro (maybe we call it the Mk1 as a retronym).

Despite this, I am learning towards making a separate controller class for the Mk2 just to keep the interfaces neater.

[SavinaRoja]

Here is the spec.

PRO2_API_03.pdf