Generally, the only time I’ve ever seen DMX in use is for stage productions. [Dan] sent in his home light control project – he used a RS-232 to DMX interface and a bunch of commercial DMX dimmers.

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If you don't know the serial address of the DMX controller yet, you can do the following to identify it: python -m DMXEnttecPro.utils which will give you some detailed information on all COM ports ...