WooCommerce Automatic Order Printing allows store admin to print order invoices, packing slips automatically using PrintNode.

Normally when an order is received, store admin will open the order and manually prints invoices, packing slips etc.. Doing it manually for multiple orders is time taking. This WooCommerce Automatic Order Printing makes this process automated.
How it works:

This plugin sends the configured packing slips, invoices to PrintNode automatically for each and every order which is placed in the WooCommerce store. Then PrintNode sends those prints to configured printers to print.