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A comment on The smallest and worst HDMI display. Parent comment

Re:The smallest and worst HDMI display by MayeulC on Thursday March 31, 2022 @04:17PM (#30871757)
HDCP is unrelated to the CEC bus. CEC is completely separate and unencrypted. The pulse-eight adapter, AFAIK, should just be a female-female connector with two pins plugged into a microcontroller.

I've toyed with the idea of replicating its functionality on an Arduino, but ended up just buying the adapter :)

In the end, I'm not sure how doable it is, but it shouldn't be too complex. Licensing is another matter. I'm at a loss as to why GPU makers don't wire it up though.

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Re:The smallest and worst HDMI display by exikyut on Thursday March 31, 2022 @04:38PM (#30871940)
I see (TIL a lot about CEC, added some info to a sibling comment).

I incidentally found https://hackaday.io/project/168696-cec2usb while poking around, last updated a couple years ago so probably not available for sale anymore, but open source at least.

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