Using a custom media player with M5Stack Atom Echo as Voice Assistant on Home Assistant

m5stack-atom-echo.yaml

substitutions:
  name: m5stack-atom-echo
  friendly_name: M5Stack Atom echo

packages:
  m5stack.atom-echo-wake-word-voice-assistant: github://esphome/wake-word-voice-assistants/m5stack-atom-echo/m5stack-atom-echo.yaml@main
esphome:
  name: ${name}
  name_add_mac_suffix: true
  friendly_name: ${friendly_name}
api:
  encryption:
    key: YOUR_KEY


wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

# All of the above should be auto generated by tools like https://esphome.io/projects/index.html.
# Add the section below to your generated config.
# By Vinicius Fortuna.
text:
    # Text configuration to se the media player you want to use for the assistant voice.
  - platform: template
    name: "Assistant Media Player"
    id: assistant_media_player
    entity_category: CONFIG
    initial_value: media_player.living_room_sonos
    # Saves and loads the state to RTC/Flash
    restore_value: true
    mode: text
    optimistic: true


voice_assistant:
  # This removes the speaker entry in the original config.
  # See https://esphome.io/components/voice_assistant.html#configuration.
  # There's a media_player option, but I couldn't make it work with the Home Assistant media player.
  speaker: !remove
  on_tts_end: 
    # Call the media player as a service. You need to configure the device in the ESPHome integration to
    # "Allow the device to perform Home Assistant actions".
    - homeassistant.service: 
        service: media_player.play_media
        data:
          entity_id: !lambda "return id(assistant_media_player).state.c_str();"
          media_content_id: !lambda "return x;"
          media_content_type: music
          announce: "true"