https://github.com/manio/cec-dpms

Simple program to power on/off TV by simulating DPMS feature using HDMI CEC
https://github.com/manio/cec-dpms

cec dpms hdmi libcec rust

Last synced: about 7 hours ago
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Simple program to power on/off TV by simulating DPMS feature using HDMI CEC

• Host: GitHub
• URL: https://github.com/manio/cec-dpms
• Owner: manio
• License: gpl-2.0
• Created: 2022-02-21T14:31:34.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2023-10-17T04:05:36.000Z (about 1 year ago)
• Last Synced: 2024-10-31T11:28:37.388Z (16 days ago)
• Topics: cec, dpms, hdmi, libcec, rust
• Language: Rust
• Homepage: https://manio.github.io/cec-dpms/
• Size: 16.6 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# 🔘 cec-dpms

[![Crates.io](https://img.shields.io/crates/v/cec-dpms.svg)](https://crates.io/crates/cec-dpms)

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## Description

This small linux tool is intended to emulate DPMS using [HDMI-CEC](https://en.wikipedia.org/wiki/Consumer_Electronics_Control) interface.

It is using the [libcec](https://github.com/Pulse-Eight/libcec) library via [cec-rs](https://crates.io/crates/cec-rs).

This way it allows to emulate DPMS but for the TV connected to the CEC bus, as the result the TV behaves similar to a regular monitor.

The user however has to run own scripts for controlling it.

## Usage

```

cec-dpms 0.1.0

Simple program to power on/off TV by simulating DPMS feature using HDMI CEC

USAGE:

    cec-dpms [OPTIONS]

OPTIONS:

    -d, --debug            Enable debug info

    -h, --help             Print help information

    -i, --input     input device path/name of CEC device

    -V, --version          Print version information

```

The program is designed to be continuously running in background (Eg. started from systemd service).


It is listening to `USR1` and `USR2` signals:

- `USR1` is powering ON the TV,

- `USR2` is powering OFF the TV

## Example

An example of using this tool along with [Sway](https://swaywm.org/):


In the sway config file configure the `swayidle` like this:

```

exec swayidle \

    timeout 600 'swaymsg "output * dpms off"' \

       resume 'swaymsg "output * dpms on"' \

    timeout 600 'sudo pkill -USR2 cec-dpms' \

       resume 'sudo pkill -USR1 cec-dpms'

```

## systemd integration

A sample service file for systemd is here:


[systemd/cec-dpms.service](https://github.com/manio/cec-dpms/blob/master/systemd/cec-dpms.service)


You need to adjust it for your needs (eg. check the binary path).


After placing the unit file in correct location and reloading systemd, the unit can be started as usual:


`systemctl start cec-dpms.service`