Self-Service Weighing ZPL Print Driver

Printer

Add printer to the OS.

Browse to the CUPS configuration page to get the name of the printer that will be used: http://localhost:631/printers. Set this name as the printer name in the POS self-service configuration page.

Center the barcode by trial and error using the label offset and size configuration values of the POS self-service configuration page.

Configure printer to accept several jobs in a row:

lpadmin -p <PRINTERNAME> -o usb-no-reattach-default=true

And restart CUPS to apply the new configuration:

sudo service cups restart

Reverse proxy with nginx

Install nginx:

apt install nginx

Start nginx:

sudo systemctl start nginx.service

Copy this file in:

/etc/nginx/sites-available/cups

upstream cups-reverse-proxy {
    server 127.0.0.1:631 weight=1 fail_timeout=60s;
}

server {
    # server port and name
    listen 8631;
    listen [::]:8631;
    server_name _;

    # ssl log files
    access_log /var/log/nginx/cups-access.log;
    error_log /var/log/nginx/cups-error.log;


    # increase proxy buffer to handle some Odoo web requests
    proxy_buffers 16 64k;
    proxy_buffer_size 128k;

    location / {
        proxy_pass http://cups-reverse-proxy;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Host $server_name;

        add_header 'Access-Control-Allow-Origin' $http_origin always;
        add_header 'Access-Control-Allow-Credentials' * always;
        add_header 'Access-Control-Allow-Methods' * always;
        add_header 'Access-Control-Allow-Headers' * always;
        # required to be able to read Authorization header in frontend
        add_header 'Access-Control-Expose-Headers' * always;

        if ($request_method = 'OPTIONS') {
            # Tell client that this pre-flight info is valid for 20 days
            add_header 'Access-Control-Max-Age' 1728000;
            add_header 'Content-Type' 'text/plain charset=UTF-8';
            add_header 'Content-Length' 0;
            add_header 'Access-Control-Allow-Origin' $http_origin always;
            add_header 'Access-Control-Allow-Credentials' * always;
            add_header 'Access-Control-Allow-Methods' * always;
            add_header 'Access-Control-Allow-Headers' * always;
            # required to be able to read Authorization header in frontend
            add_header 'Access-Control-Expose-Headers' * always;

            return 204;
        }

        # by default, do not forward anything
        proxy_redirect off;
    }
}

Create symbolic link:

sudo ln -s /etc/nginx/sites-available/cups /etc/nginx/sites-enabled/

Check the syntax is ok:

sudo nginx -t
sudo systemctl restart nginx.service

Reset a Zebra printer

Factory reset video

Authors

• Coop IT Easy SC

Contributors

• Coop IT Easy SC:
  • Grégoire Leeuwerck
  • Vincent Van Rossem
  • hugues de keyzer
• Le Nid:
  • François Kawala

Maintainers

This module is maintained by the OCA.

OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.

This module is part of the OCA/pos project on GitHub.

You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.