makarov
- RPi Zero W
- RPi OS buster Lite (based on Debian 10.10)
Linux makarov 5.10.17+ #1421 Thu May 27 13:58:02 BST 2021 armv6l GNU/Linux
- Located wherever I take it
network
Static DHCP assignment in IOT VLAN, it should have minimal access privileges, it literally only needs web access. No IPv6 apart from usual linklocal stuff.
services
- SSH
- Some avahi junk I should probably disable
apps
muzak systemd unit plays music, running as the pi user
frontpanel systemd unit manages the LCD and button inputs
Muzak app
Runs mpv with a playlist of Youtube links, super basic. Audio goes out through an I2S soundcard. Playlist loops forever as you'd expect. Playlist and extra stuff is in /home/pi
Frontpanel app
A python script with some basic GPIO interfacing, controls mpv by talking to its JSON-IPC socket. Displays images and UI on the LCD screen.
Optimisation
Aim to disable as much stuff as possible, to reduce CPU load and boot times.
Try to disable:
- bluetooth
https://sleeplessbeastie.eu/2018/12/31/how-to-disable-onboard-wifi-and-bluetooth-on-raspberry-pi-3/
dtoverlay=disable-bt
- systemctl disable --now hciuart
- apt-daily-upgrade
- avahi-daemon.service
- keyboard-setup.service
- bluetooth.service
- Make the filesystems read-only, or at least /boot can be
- Remove the Mopidy stuff that I installed