@salwetherall
Author of the SpotifyPlus Integration here …
The Spotify Connect AddOn is used if your device that is running your Home Assistant server will be used to output Spotify audio to a speaker. An example of this would be a Raspberry Pi (3, 4, 5, etc) that has an audio cable running from it’s 3.5mm audio output jack (or even HDMI audio output) to an amplifier input (or amplified speaker input). For Google Nest devices, you don’t need this addon since the device itself already supports the Spotify Connect Zeroconf protocol and streams the Spotify audio directly to the Nest device.
Note that the HA Spotify Integration will not work for activating the Spotify App on the Google Nest device, though it can be used to control Spotify play on the device (e.g. pause, resume, volume adjust, etc) if the device is activated via the Spotify Mobile / Desktop / Web app.
For Google Nest devices, you will want to use either the SpotifyPlus integration or the SpotCast integration (v6, dev branch) - both of these integrations allow you to activate the Spotify App on the Google Nest (or other Chromecast) device.
As a quick example, you can use the following SpotifyPlus Player Media Play Context service call to transfer playback to a Google Nest device, and start playing the specified playlist.
service: spotifyplus.player_media_play_context
data:
entity_id: media_player.spotifyplus_john_s
context_uri: spotify:playlist:6M8n0Sp9895BXEE0MbGPde
device_id: "Nest Audio 01"
shuffle: true
Hope it helps!
More Info on SpotifyPlus
The SpotifyPlus integration can do everything that the HA Spotify integration can do, supports Spotify Connect enabled devices (Bose, Sonos, Google Chromecast, Amazon Alexa, Denon, JBL, and more), and provides 95+ custom services that can be used in HA automations and scripts. It also has 10 voice assistant intents that allow you to control the player, play content, manage favorites, etc - all with your voice.
There is also a SpotifyPlus Card user-interface that allows you to control the player, manage your Spotify favorites, as well as search the Spotify catalog. You have to install the SpotifyPlus integration first though, and get it configured before you can use the SpotifyPlus Card.
Both are easily installed via HACS.