volume-control-mqtt

volume-control-mqtt

A simple repo that allows you to set up a Docker container to control Linux volume via MQTT.

I created this because I recently purchased an Ikea SYMFONISK Sound remote that I wanted to use with HomeAssistant to control my HTPC volume, which is also where HomeAssistant runs (in Docker). Since the rest of my HA infrastructure is Dockerized, I also wanted a way to control the volume from Docker.

This project uses the eclipse/paho.mqtt.golang to communicate with MQTT, and the volume-go library by itchyny.

Running it in Docker

This uses PulseAudio over a socket shared into the container

docker build -t volume-control .

docker run \
  -v "~/.config/pulse:/.config/pulse" \
  -v /run/user/$UID/pulse/native:/run/user/$UID/pulse/native \
  -e VOLUME_INCREMENT=3 \
  -e PULSE_SERVER="unix:/run/user/$UID/pulse/native" \
  -e MQTT_BROKER=localhost \
  -e MQTT_PORT=1883 \
  -e MQTT_TOPIC=/volume-control \
volume-control

The VOLUME_INCREMENT is the number it adjusts volume up and down - I found 3 to be the most comfortable with the IKEA control.

The MQTT_BROKER, PORT and TOPIC can all be set to your desire.

Expected Messages

Right now, I have it hardcoded to just expect an "up" or "down" message.