Smart HDMI Switcher | ESPHome | Page 1

candid current Mar 28, 2023, 10:25 AM

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This was my first ESPHome project and I'm happy with the result.

Demo video: https://youtu.be/F_oZo9kNero
How to make it: https://github.com/redphx/esphome-ugreen-hdmi-switcher

coarse citrus Mar 28, 2023, 12:12 PM

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oh interesting. have you thought about powering the esp from the HDMI input(s)?

candid current Mar 28, 2023, 12:25 PM

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coarse citrus oh interesting. have you thought about powering the esp from the HDMI input(s)?

I tried. The one next to CKI port has ~3.2V. I tried to boot the esp with it but didn't success. I'm a newbie so I couldn't do anything further with it.

glass fjord Mar 28, 2023, 8:11 PM

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Hmmh, you should see +5V on the source HDMI connectors Pin 18 at least, but that's 50mA. An ESP32 can draw more than 200mA on boot and during wifi ops, so that's a no-go.
You'd need to get an active hdmi cable (with either support for that from the source device, or a power injector) to get enough power through to power anything meaningful.

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8266 is apparently actually even more power-hungry, with a 500mA peak

candid current Mar 28, 2023, 11:38 PM

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glass fjord Hmmh, you should see +5V on the source HDMI connectors Pin 18 at least, but that...

i guess it's not possible then

arctic comet Mar 30, 2023, 6:06 AM

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This is cool - I did something similar with one of these... https://www.amazon.com/gp/product/B09STMC798

I'll snap some pictures and upload the ESP file.

#Smart HDMI Switcher