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A comment on Ask HN: Most interesting tech you built for just yourself?. Parent comment

Re:Ask HN: Most interesting tech you built for just yourself? by mattmanser on Friday April 28, 2023 @09:57AM (#35741321)
HDMI seems to be two way, my ps5 turns on automatically when I turn my TV on.

So you should be able to do something with that.

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Re:Ask HN: Most interesting tech you built for just yourself? by afavour on Friday April 28, 2023 @10:01AM (#35741357)
Oh, it's definitely possible. Software like dizquetv it must know when a new connection is made. But to add such a feature would require a lot of familiarization with their codebase and I don't currently have the time.

One day...

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Re:Ask HN: Most interesting tech you built for just yourself? by brendev on Friday April 28, 2023 @06:34PM (#35747968)
The protocol you're looking for is HDMI-CEC! Not a ton of good documentation out there, but hopefully this helps send you down a good path.
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