This requires the use of input_boolean helpers to control the state of the entity.

E.g. to control a smart plug...

# configuration.yaml
switch:
  platform: template
  switches: 
    6a_plug:
      value_template: "{{ is_state('input_boolean.6a_plug_state', 'on') }}"
      turn_on:
        - service: input_boolean.turn_on
          entity_id: input_boolean.16a_plug_state
        - service: media_player.play_media
          entity_id: media_player.new_room_echo
          data:
            media_content_id: 'turn on 6a plug'
            media_content_type: custom
      turn_off:
        - service: input_boolean.turn_off
          entity_id: input_boolean.6a_plug_state
        - service: media_player.play_media
          entity_id: media_player.new_room_echo
          data:
            media_content_id: 'turn off 6a plug'
            media_content_type: custom

Requires Voxel's firmware and entware to be installed.

Get current WAN usage

Using netdata:

# ssh [email protected]
opkg install netdata

Add to Home Assistant with the Netdata integration.

Using vnstat to get total daily/monthly usage

# Install on router
opkg install vnstat
vnstat --create -i eth0
reboot

# configuration.yaml
# Daily usage
sensor:
 - platform: command_line
   name: Router daily WAN usage
   command: "/bin/bash /config/scripts/orbi_router.sh wan_daily"
   # Script in ./bash_scripts/orbi_router.sh
   scan_interval: 120
   value_template: "{{ value_json.id }}"
   json_attributes:
     - rx
     - tx

 - platform: template
   sensors:
    wan_daily_usage_up:
    friendly_name: WAN daily usage (upload)
    unit_of_measurement: 'MB'
    icon_template: mdi:arrow-down
    value_template: >-
      {% if state_attr('sensor.router_daily_wan_usage','tx') != None %}
        {{ (state_attr('sensor.router_daily_wan_usage','tx')|float/1000)|round }}
      {% else %} NaN {% endif %}

  wan_daily_usage_down:
    friendly_name: WAN daily usage (download)
    unit_of_measurement: 'MB'
    icon_template: mdi:arrow-up
    value_template: >-
      {% if state_attr('sensor.router_daily_wan_usage','rx') != None %}
        {{ (state_attr('sensor.router_daily_wan_usage','rx')|float/1000)|round }}
      {% else %} NaN {% endif %}

# configuration.yaml
# Monthly internet usage
sensor:
  - platform: command_line
    name: Router monthly WAN usage
    command: "/bin/bash /config/scripts/orbi_router.sh wan_monthly"
    scan_interval: 00:30:00
    value_template: "{{ value_json.index }}"
    json_attributes:
      - upload
      - download

  - platform: template
    sensors:
    wan_monthly_usage_up:
      friendly_name: WAN monthly usage (upload)
      unit_of_measurement: GB
      icon_template: mdi:upload
      value_template: >-
        {% if state_attr('sensor.router_monthly_wan_usage','upload') != None %}
          {{ (state_attr('sensor.router_monthly_wan_usage','upload')|float/976563)|round(1) }}
        {% else %} NaN {% endif %}

    wan_monthly_usage_down:
      friendly_name: WAN monthly usage (download)
      unit_of_measurement: GB
      icon_template: mdi:download
      value_template: >-
        {% if state_attr('sensor.router_monthly_wan_usage','download') != None %}
          {{ (state_attr('sensor.router_monthly_wan_usage','download')|float/976563)|round(1) }}

This involves a input_number helper, an automation and a series of shell commands.

Requires alsamixer to be installed.

# configuration.yaml
input_number:
  pi_volume:
    min: 0
    max: 100
    step: 5

automation: 
  - alias: Set soundbar volume
    trigger:
      - platform: state
        entity_id: input_number.pi_volume
    action:
      - service_template: shell_command.pi_volume_{{ trigger.to_state.state | int }

shell_command:
  pi_volume_0: echo amixer_0 | netcat localhost 7900
  pi_volume_5: echo amixer_5 | netcat localhost 7900
# Truncated. Full in ./config

Similar to above, the script calls the command amixer to increase or decrease the volume...

hass_socket_script.sh:

#!/bin/bash

if [[ $MESSAGE == 'amixer_0' ]]; then amixer -q cset numid=1 -- -10239; fi
if [[ $MESSAGE == 'amixer_5' ]]; then amixer -q cset numid=1 -- -7399; fi
# Truncated. Full in ./bash_scripts/hass_socket_script.sh

# configuration.yaml
switch:
  platform: command_line
  switches:
    lofi_beats:
      command_on: echo "lofi_on" | nc localhost 7900
      command_off: echo "lofi_off" | nc localhost 7900

socat runs in the background (systemd unit file) and listens for commands.

Once a switch is turned on, this script is called that starts the playback...

hass_socket_script.sh:

#!/bin/bash
read MESSAGE

if [[ $MESSAGE == 'lofi_on' ]]; then 
  screen -S lofi -dm /usr/bin/mpv --no-video $(/path/to/youtube-dlc -g -f 95 5qap5aO4i9A); fi
if [[ $MESSAGE == 'lofi_off' ]]; then screen -S lofi -X quit; fi
# Truncated. Full in ./bash_scripts/hass_socket_script.sh

# Pull Docker image
docker pull agneev/librespot-alsa

# 
docker run --network host -d /dev/snd:/dev/snd agneev/librespot-alsa

# Customize config file:
nano /opt/spocon/config.toml