1. Install raspberrypi os https://www.raspberrypi.com/software/
2. install raspotify https://dtcooper.github.io/raspotify/
3. configure raspotify for username/password auth (/etc/raspotify/conf)
4. configure raspotify for playback settings
5. (optional) configure DAC
6. restart raspotify

Hints:

xz -d < 2022-09-06-raspios-bullseye-armhf-lite.img.xz | sudo dd of=/dev/sdg bs=4M conv=fsync status=progress
touch /run/mediaXXX/boot/ssh
openssl passwd -6
vi /run/media/xxx/boot/userconf.txt

Headless rpi setup: https://www.raspberrypi.com/documentation/computers/configuration.html#setting-up-a-headless-raspberry-pi

Setup user: https://www.raspberrypi.com/documentation/computers/configuration.html#configuring-a-user

SSH enable by adding `ssh` file to boot partition: https://www.raspberrypi.com/documentation/computers/remote-access.html#ssh

sudo apt-get -y install curl && curl -sL https://dtcooper.github.io/raspotify/install.sh | sh

sudo vi /etc/raspotify/conf
sudo systemctl restart raspotify.service

#LIBRESPOT_AUTOPLAY=
#LIBRESPOT_DISABLE_CREDENTIAL_CACHE=
LIBRESPOT_DISABLE_DISCOVERY=
LIBRESPOT_BITRATE="320"
LIBRESPOT_FORMAT="S24"
LIBRESPOT_USERNAME="<username>"
LIBRESPOT_PASSWORD="<password>"
 #TMPDIR=/tmp

 HiFiberry DAC already included in upstream Raspberry Pi OS, but needs configuration. Note the kernel 5.14+ instructions.

https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/

I assume the Spotify Connect device is functional and visible as a "device" in the Spotify interface (or API).

This is for NFC reader portion.

Factory reset if need:

1. Remove power
2. Hold down button A (or both if you don't know)
3. Apply power
4. Release button A
5. Press button 0 (boot select button on PCB next to ESP32 module)
6. Release button 0
7. Wait 10 seconds
8. Remove power
9. Apply power and you are in factory reset state

Configure Network:

1. Apply power
2. Join WifiManager SSID with PSK `tayfunulu`
3.  Navigate to http://192.168.4.1
4. Select SSID
5. Enter WLAN PSK
6. Submit

This requires a client which supports mDNS addresses. Most major web browsers and operating systems support mDNS. I have tested with Firefox on Fedora 36.

1. Navigate to Spotify config address of device indicated on OLED
2. Enter Spotify API client id: 4efe77ff069f45a79d7cc3279e2ba870
3. Enter Spotify Secret: 8d52b8bd5e8f48ed96987d07d76adf37
4. Submit
5. Wait for device to reboot (~10-20 seconds)
6. Web browser may timeout
7. Click "retry" on web browser after 10 seconds
8. Select Spotify Connect device
9. Submit

1. Hold down both play control buttons
2. Navigate to IP address indicated on OLED
3. Enter full API JSON URL of airtable sheet
4. Ignore other fields and links
5. Submit

Airtable URL example:

https://api.airtable.com/v0/<app id>/<table id or name>?api_key=<api key>

if your URL in your browser looks like https://airtable.com/appaHNgIJQBNzJHh4/tbl0sgem3IxeTgFw0:
appid = appaHNgIJQBNzJHh4
tableid = tbl0sgem3IxeTgFw0

api_key is from https://airtable.com/account page.
NB: this is a privileged key.

TODO