Setting up a new scary RPi

Preparing the flash card

See: https://www.raspberrypi.org/documentation/installation/installing-images/README.md

• Download Raspian Image "RASPBIAN Bullseye LITE": https://www.raspberrypi.org/downloads/raspbian/
• Download Etcher: https://etcher.io/
• Use the application Etcher to flash the image (see README above).
• Take out and re-insert the flash card so that it is visible again.
• Create an empty file with name "ssh" in the root directory of the flash card (which is usually called "boot"): touch /Volumes/bootfs/ssh
• Create the user config file: echo "pi:$(echo "raspberry" | openssl passwd -6 -stdin)" > /Volumes/bootfs/userconf
• Put memory card into an RPi

Configuring the RPi

• Plug in network cable
• Boot the RPi by plugging in a Mini USB cable
• After booting, find out the RPi's IP address
• SSH into the RPi as user "pi" (default password is "raspberry"): ssh pi@IP_ADDRESS
• Start configuration tool: sudo raspi-config. In the config tool:
  • Enable SSH for good in sub-menu "Interfacing Options".
  • Create locales. We need at least en_US.UTF-8.
  • Change the hostname to the name of the installation, e.g. eyesinthedark
  • Enter Wifi Country, SSID and password (For old RPis: insert Wifi USB stick and reboot beforehand).

Software installation

• sudo apt-get --allow-releaseinfo-change update
• sudo apt-get install git
• Clone the repo https://git.mattzz.de/mattzz/halloween.git (see below for a suggestion how)

This will install all required dependencies, fix the locale stuff and setup nginx/systemd:

• cd halloween

• $ chmod +x setup.sh

• $ sudo ./setup.sh

• see How-to-install-pylibftdi-for-DMX for more details

git tips

• Clone without hacking certicate: env GIT_SSL_NO_VERIFY=true git clone https://git.mattzz.de/mattzz/halloween.git
• Never check certificate for this repo: cd halloween git config http.sslVerify false
• Set the cache to timeout after 1 hour (setting is in seconds): git config --global credential.helper 'cache --timeout=3600'

Other tips

• Follow nginx/pumpkin log output: journalctl -u pumpkin -f
• Restart and follow: sudo systemctl restart pumpkin; journalctl -u pumpkin -f

Bullseye / Debian 12 notes

See also [#179]

• There is no standard pi user anymore due to security risks.
• Use rpi imager instead of belana etcher! --> https://www.raspberrypi.com/software/
• Use 32 bit image "Raspberry Pi OS Lite"
• set user to pi - allow password auth! (or see /etc/ssh/sshd_config entry PasswordAuthentiation yes
• set WIFI ssid/pw

python libs failing to install

• https://stackoverflow.com/questions/75608323/how-do-i-solve-error-externally-managed-environment-every-time-i-use-pip-3

GPIIO access failing

• make sure piis in group gpio: sudo adduser pi gpio - re-login afterwards for changes to take effect

RuntimeError: Failed to add edge detection

• https://raspberrypi.stackexchange.com/questions/147332/rpi-gpio-runtimeerror-failed-to-add-edge-detection
• sudo apt remove python3-rpi.gpio
• sudo apt install python3-rpi-lgpio