ESPHome devices gain a configurable switch for turning their Sendspin audio client off and back on. Switching it off closes the server connection and removes the device from Sendspin discovery on the network.
Kevin Ahrendt makes the switch remember its setting across a reboot. A disabled device waits for that saved setting before starting the client, avoiding a brief connection during startup. The switch defaults to on; while it is off, the device refuses playback and source commands.