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pi_setup.md

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Raspberry Pi Setup

Install system

  • Head over to https://www.raspberrypi.org/documentation/installation/installing-images/ and install. Raspbian Buster Lite is sufficient if you don't need a UI.
  • Place an empty file called ssh into root directory to enable SSH
  • Put SD card into Raspberry Pi, let it boot
  • ssh pi@raspberrypi.local and enter default password (raspberry)
  • change password ;)
  • sudo apt-get install git to install git
  • Clone this repository via git git clone https://github.com/segfault16/modular-led-controller-workstation.git
  • cd modular-led-controller-workstation

blacklist the Broadcom audio kernel module by creating a file /etc/modprobe.d/snd-blacklist.conf with

blacklist snd_bcm2835

See https://github.com/jgarff/rpi_ws281x

Install dependencies

sudo apt-get install python3-pip -y # to install pip3 on Raspbian Lite
sudo pip3 install pipenv # install pipenv
sudo apt-get install libjpeg8-dev -y # For pillow
sudo apt-get install portaudio19-dev -y # For pyaudio
sudo apt-get install libatlas-base-dev -y # For numpy
sudo pipenv install -d

Audio configuration

See Audio setup on RaspberryPi.

Start MOLECOLE once

On RaspberryPi, sudo privileges are required for accessing the GPIO of RaspberryPi.

# Run on Raspberry Pi with 300 pixels and strand test at startup:
sudo pipenv run python server.py -D RaspberryPi -N 300 --strand

Run as service

e.g. by copying the following file to /etc/systemd/system/ledserver.service

[Unit]
Description=Audio-reactive LED Strip
After=network.target

[Service]
ExecStart=/usr/local/bin/pipenv run python server.py -D RaspberryPi --config_location /home/pi/
WorkingDirectory=/home/pi/modular-led-controller-workstation
StandardOutput=inherit
StandardError=inherit
Restart=always
User=root

[Install]
WantedBy=multi-user.target

and starting the service with sudo systemctl start ledserver. To start at login do sudo systemctl enable ledserver. The service can be restarted with sudo systemctl restart ledserver. Adjust --config_location for a different configuration location.