input_number:
  dfplayer_volume:
    name: Volume
    initial: 15
    min: 0
    max: 30
    step: 1
automation:
  - alias: Set df player volume
    trigger:
      platform: state
      entity_id: input_number.dfplayer_volume
    action:
      - service: esphome.nodenfc1_dfplayer_set_volume
        data_template:
          volume: "{{ states('input_number.dfplayer_volume') | int }}"