This small linux tool is intended to emulate DPMS using HDMI-CEC interface. It is using the libcec library via 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.
``` 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
An example of using this tool along with Sway:
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'