Spotify Connect
Spotify Connect allows to send audio stream from Spotify player running on any platform to the Peppy Player. The support for Spotify Connect in the Peppy Player is based on the raspotify software.
To activate Spotify Connect the corresponding property spotify-connect (False by default) should be set to True in the configuration file config.txt. After that the Spotify Connect option will appear in the Home Menu. Clicking on it starts the raspotify server and opens the Spotify Connect screen.
After these steps the playback can be started on the Spotify player. The following image shows how that can be done using Spotify player on iPhone. This works only for premium Spotify accounts.
The playback (volume/next/previous) in this case can be controlled only on the source device (e.g. iPhone). The playlists can be selected only on the source player as well.
If you use a Bluetooth device then you need to specify the ALSA device name in the raspotify configuration file /etc/default/raspotify:
OPTIONS="--username USERNAME --password PASSWORD --device my-bluealsa-device"
Here my-bluealsa-device is the device name specified in the ALSA configuration file /etc/asound.conf or /home/pi/.asoundrc. The example of the ALSA configuration file can be found here.