phoniebox_installation

documenting building my phoniebox

Installing raspberry pi os

• 32 bit legacy lite
• after installation, force rpi to actually use 32-bit kernels, by add arm_64bit=0 to /boot/config.txt
  • MiczFlor/RPi-Jukebox-RFID#2041
  • raspberrypi/firmware#1795

Spotify

• mopidy-spotify doesn't play after reboot because it cannot login because internet is not up yet
  • it must wait until internet is up; seems a problem with raspbian actually as it seems to ignore the preqrequisites of the mopidy.service (network-online.target)
  • as a workaround, we can configure the raspberry to wait for internet connection during boot (raspi-config --> enable wait for internet on boot)
    • doesn't work for me. booting takes longer, but spotify still doesn't connect
  • https://github.com/MiczFlor/RPi-Jukebox-RFID/wiki/Troubleshooting-FAQ#spotify-wont-play-but-after-scan-of-library-it-works
  • https://raspberrypi.stackexchange.com/questions/45769/how-to-wait-for-networking-on-login-after-reboot
• Checking mopidy logs about spotify logins: journalctl -u mopidy -b --grep spotify.web (-b since last boot)
• Restarting mopidy service: sudo systemctl restart mopidy (this work, after service restart, spotify connects)
  • setting allow_playlists = false in /etc/mopidy/mopidy.conf makes restarting mopidy service a lot faster (almost instant) because it doesn't sync all spotify playlists which takes 10-30s (obviously depending on the number of playlists in the account)
  • putting sudo systemctl restart mopidy into /etc/rc.local doesn't work (presumably because internet is not available yet when it runs)
  • Idea (TODO): write a startup script that keep polling for internet connection and once established, restarts mopidy service, then exits. Must be running in background without blocking anything else.

workaround for spotidy

relax autohotstop

autohotstop service was to agressive and impatient, when scanning for SSIDs, we mostly received 'device busy'. After 5 retries it started the hotspot which disabled the already running wifi connection. I increased the retry it waits until wifi device is available from 5 to 10.

restart mopidy once internet is available

1. checkout the 3 files in this repository and create a systemd service.
2. service definition goes in /etc/systemd/system/mopidy-retry-login.service

sudo chmod a+x /usr/bin/wait-for-internet.sh
sudo chmod a+x /usr/bin/mopidy-restart-to-login.sh
sudo systemctl enable mopidy-retry-login

Improvements

faster startup

• by disabling refreshing spotify playlists: https://github.com/MiczFlor/RPi-Jukebox-RFID/wiki/Troubleshooting-FAQ#spotify-wont-play-but-after-scan-of-library-it-works
  • set allow_playlists = false in /etc/mopidy/mopidy.conf
• disabling bluetooth: https://raspberrypi.stackexchange.com/questions/53149/disable-power-on-wifi-and-bluetooth-interfaces-during-boot
  • add dtoverlay=disable-bt to /boot/config.txt
  • disable bluetooth service sudo systemctl disable bluetooth
• static ip
  • edit /etc/dhcpcd.conf, set X, Y, Z accordingly. Also configure router to assign static ip adres to RPi.

    interface wlan0
    static ip_address=192.168.X.X/24
    # static ip6_address=fd51:42f8:caae:d92e::ff/64
    static routers=192.168.X.Y
    static domain_name_servers=192.168.Z.Y 192.168.X.Y 8.8.8.8
    noarp
    ipv4only
    noipv6
    

• disable IPv6

  • sudo sh -c "echo 'options ipv6 disable=1' >> /etc/modprobe.d/ipv6.conf"
    sudo sh -c "echo 'net.ipv6.conf.all.disable_ipv6 = 1' >> /etc/sysctl.conf"
    sudo sh -c "echo 'noipv6' >> /etc/dhcpcd.conf"
    sudo sysctl -p