JOjorvi·Dec 11, 2025
[Older] LG TVs do not implement CEC Standby command. You need a hardware mod: https://github.com/Pulse-Eight/libcec/issues/363#issuecommen...
In Valve: HDMI Forum Continues to Block HDMI 2.1 for LinuxPulse-Eight
libcec
C++2018–2025
Pulse-Eight / libcec
libcec
USB CEC Adapter communication Library
3Distinct people
3Mentions
0Explicit recommenders
816GitHub stars
What to know before exploring
What it is
USB CEC Adapter communication Library
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
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Also in these discussions
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year3 dated mentions
Observed mentions: 2018-03-27 00:59:33 UTC to 2025-12-11 02:23:19 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
3 sourcesIf you're interested in getting more quickly and WANT to write software, you can have the Raspberry Pi control most televisions over HDMI-CEC using libcec [0], and then you just need the voice recognition stuff mentioned above (Rhasspy [1]).
I had to do something similar (minus voice controls) to keep my existing remote's volume controls working with an analog volume device [2].
[0] https://github.com/Pulse-Eight/libcec
[1] https://github.com/rhasspy/rhasspy
[2] https://rkeene.org/viewer/tmp/cec-volume.cc.htm
In Google is officially releasing Fuchsia OS, starting with a first-gen Nest HubIf you have HDMI, the EDID comes through on the DDC which is just I2C. You can read it with a BusPirate or any decent LA: https://www.extron.com/company/article.aspx?id=uedid
HDCP also happens over this interface, so it’s trivial to snoop on the key exchange: https://github.com/ApertureLabsLtd/hdmi-sniff/blob/master/RE...
CEC (control devices via HDMI) happens on a separate channel using a proto also similar to I2C: http://www.quantumdata.com/pdf/CEC_White_Paper.pdf
There are a few good ~cheap CEC adapters for HDMI out there. I’ve used the PulseEight one since they have decent library support plus a CLI. You can also use the HDMI port on a Raspberry Pi to play with CEC: https://github.com/Pulse-Eight/libcec/blob/master/docs/READM...
In Reading a VGA monitor's configuration data with I2C and a PocketBeagle