How to? Casting with service or entities card

Configuration
1

Hi

I have a Home Assistant setup that I have managed to get working with cast.home-assistant.io.

IMG_0646(1)
IMG_0646(1)1920×1265 182 KB

IMG_0647(1)
IMG_0647(1)1920×1263 171 KB

For anyone interested I achieved it by doing the following:

  • I enabled https with the help of letsencrypt.
  • I have a local DNS forwarding in my router, that forwards subdomain.mydomain.dk to the Home Assistant server IP.
  • I have a rule in my router that redirects DNS traffic from my Google Nest Hub to my router (because Google DNS is hard coded in the Nest Hub).

While cast.home-assistant.io is working fine, I find it a bit limiting.
1: I can only cast the default “Overview” dashboard.
2: It would be nice to start a cast from a dashboard or service.

I haven’t managed to ever get casting working from either a service call or with the entities card.
I use the following to initiate the cast from a button.

show_name: true
show_icon: true
type: button
tap_action:
  action: call-service
  service: cast.show_lovelace_view
  data:
    entity_id: media_player.nest_hub
    dashboard_path: /lovelace
    view_path: /ur
icon: mdi:cast

I´m not sure if the syntax is correct. Do I need a forward slash before the paths or not (I tried both).

Anyway, I just see the following on my Nest Hub.

IMG_0645(1)
IMG_0645(1)1920×1268 197 KB

Does anyone have any tips to get it working with either the card or the service?

I would be happy to supply any information needed.

Kind regards
Michael Tandrup
Denmark

2

Also it would be nice to be able to incorporate the cast in some sort of automation or monitoring.
For example a reinitiation of the cast if it stops for some reason.

I can’t see how that would be possible, if the cast is always initiated from cast.home-assistant.io.

3

I solved it.

I had to add external_url and correct address to configuration.yaml.

I guess cast.home-assistant.io doesn’t care about external_url.