Setting volume level google cast audio

Configuration
1

Hi folks. Has anyone been able to set volume level with a Google Cast Audio? Everything working fine in playing an MP3 file but when I add this set volume command, it doesn’t play at all. Can’t find any other documentation to check if I’ve got the volume formatting exactly right.

service: media_player.set_volume_level
entity_id: (correctly formatted)
volume: 20

Grateful for any ideas.

2

Did you ever come up with anything for this?

3

Did you try service: media_player.volume_set?

4

use like this:

service: media_player.volume_set
  data:
    entity_id: media_player.home_group
    volume_level: '0.80'

Max volume level is 1.0, adjustable in 0.05 steps.