Setup

This guide assumes you have a raspberry pi, running raspberry pi os, and your have a user called "techinc". (If you have a different username, you are going to have to change some lines in label_printer.service)

Install

from the techinc home directory:

sudo apt update
sudo apt upgrade (Had some issues installing pillow through pip without this)
sudo apt install git libopenjp2-7 libfreetype6
git clone https://code.techinc.nl/amy/label_printer.git

navigate into the label_printer directory

python -m venv venv (this will take a while)
source venv/bin/activate
pip install --upgrade colorama flask pillow python-escpos pyusb

run python3 app.py to test if the webserver starts without errors (to reduce the need for troubleshooting later).

If you get something that looks like:

 * Serving Flask app 'app'
 * Debug mode: off
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on http://127.0.0.1:5000
Press CTRL+C to quit

This means things are working as expected. You can quit it by pressing ctrl+C

Installing the systemd daemon

sudo cp label_printer.service to /etc/systemd/system/

sudo systemctl daemon-reload
sudo systemctl enable label_printer
sudo systemctl start label_printer

The interface should now be running on localhost:5000, which we need to route to the outside world in the next step

Setup the nginx

sudo apt install nginx

edit /etc/nginx/sites-available/default and change the contents of:

location / { }

to:

location / {
    proxy_pass http://127.0.0.1:5000;
}

sudo systemctl restart nginx

Setup static ip on the pi

edit /etc/dhcpcd.conf and add:

static ip_address=10.209.10.2/24
static routers=10.209.10.254
static domain_name_servers=10.209.10.255

/etc/wpa_supplicant/wpa_supplicant.conf:

ctrl_interface=/run/wpa_supplicant
update_cunfig=1

wpa_passphrace ssid password >> /etc/wpa_supplicant/wpa_supplicant.conf

sudo apt install dhcpcd sudo ln -s /usr/share/dhcpcd/hooks/10-wpa_supplicant /usr/lib/dhcpcd/dhcpcd-hooks/ sudo systemctl enable dhcpcd