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octoprint_install-on-armbian.md

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Octoprint on armbian (PCDUINO3)

Mostly the same as on raspbian but with additional requirement of manually installing the global virtualenv package (not automatically installed with python-virtualenv).

It is assumed you have set up your OS with a user named "pi" to keep as close as possible to the Raspbian install. If not, substitute your own username where the "pi" user is present.

Install:

cd ~
sudo apt-get update && sudo apt-get -y install python-pip python-dev python-setuptools python-virtualenv virtualenv git libyaml-dev build-essential
git clone --depth 1 https://github.com/foosel/OctoPrint.git
cd OctoPrint
virtualenv venv
./venv/bin/pip install pip --upgrade
./venv/bin/python setup.py install
mkdir ~/.octoprint

Note: --depth 1 may leave git unable to check out other branches apart from "master", if this ends up being the case, SSH in and run git remote set-branches origin '*' in the OctoPrint directory where the code was cloned into, then git fetch

Enable serial port access to the pi user and passwordless shutdown

sudo usermod -a -G tty pi
sudo usermod -a -G dialout pi

sudo nano /etc/sudoers.d/octoprint-shutdown

and add: pi ALL=NOPASSWD: /sbin/shutdown

Since armbian requires a password for everything, a more comprehensive sudoers file would be

sudo nano /etc/sudoers.d/piuser

and add:

pi ALL=NOPASSWD: /sbin/shutdown
pi ALL=NOPASSWD: /usr/sbin/service octoprint
pi ALL=NOPASSWD: /usr/bin/apt-get
pi ALL=NOPASSWD: /bin/cp

(Log out and log back in to activate the change)

Then activate the virtual environment and start octoprint:

source venv/bin/activate
octoprint serve

To install the service:

Edit ~/OctoPrint/scripts/octoprint.default and change the DAEMON path to match install path e.g. DAEMON=/home/pi/OctoPrint/venv/bin/octoprint

sudo cp ~/OctoPrint/scripts/octoprint.init /etc/init.d/octoprint
sudo chmod +x /etc/init.d/octoprint
sudo cp ~/OctoPrint/scripts/octoprint.default /etc/default/octoprint
sudo update-rc.d octoprint defaults

OctoPrint can now be controlled via sudo service octoprint {start|stop|restart}

Mjpeg streamer:

Side note: At the time of writing this, the octoprint wiki calls for the installation of libjpeg8-dev, Armbian threw an error that this package wasn't available, libjpeg62-turbo-dev was substituted in its place

cd ~
sudo apt-get -y install subversion libjpeg62-turbo-dev imagemagick libav-tools cmake
git clone https://github.com/jacksonliam/mjpg-streamer.git
mv mjpg-streamer/mjpg-streamer-experimental/* mjpg-streamer/
rm -r mjpg-streamer/mjpg-streamer-experimental
cd mjpg-streamer
export LD_LIBRARY_PATH=.
make

Add user to the video group to access the /dev/video device sudo usermod -a -G video pi

Start mjpeg streamer ./mjpg_streamer -i "./input_uvc.so" -o "./output_http.so"

There are extra instructions here: https://github.com/ntoff/mjpeg-streamer-octoprint-daemon to install mjpeg streamer as a daemon. They were intended for raspbian but will also work on Armbian (or possibly anywhere else), just make sure the path and user name match your configuration.