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   Ryan Castellucci (they/them) :nonbinary_flag: (ryanc@infosec.exchange)'s status on Sunday, 07-Jun-2026 22:51:17 JST Ryan Castellucci (they/them) :nonbinary_flag:

   The HDMI switch I previously mentioned I was modifying to be controlled directly via the IR receiver pin.

   • Embed this notice
     webhat (webhat@infosec.exchange)'s status on Sunday, 07-Jun-2026 23:55:17 JST webhat

     in reply to

     @ryanc nice alt, I didn't see the yellow badge wire on the first pass

     BTW, keeping the 5v hot, was that to interfere with some devices who wanted the i²c to be on continuously

   • Embed this notice
     Ryan Castellucci (they/them) :nonbinary_flag: (ryanc@infosec.exchange)'s status on Monday, 08-Jun-2026 00:18:59 JST Ryan Castellucci (they/them) :nonbinary_flag:

     in reply to

     • webhat

     @webhat The 5v line is used to detect the source - the HDMI switch otherwise will not consider that port a valid target. If I switch to it, the monitor shuts off.

   • Embed this notice
     Ryan Castellucci (they/them) :nonbinary_flag: (ryanc@infosec.exchange)'s status on Monday, 08-Jun-2026 00:26:31 JST Ryan Castellucci (they/them) :nonbinary_flag:

     in reply to

     • webhat

     @webhat The switch uses the NEC IR protocol, and the first Google result for "HDMI switch ir codes" turns up this:

     https://community.kinivo.com/t/information-hex-ir-codes/491

     which I got working via a Python script talking to pigpiod.

     The HDMI switch throws a bloody fit if the control line stays low, though.

   • Embed this notice
     webhat (webhat@infosec.exchange)'s status on Monday, 08-Jun-2026 02:01:19 JST webhat

     in reply to

     @ryanc I guessed it was something like that, but for an external sink