This is a simple little project. I had this as a module in my joomla/virtuemart installation and therefore I can provide the code for it.
The new plugin I want made will scan the SKU serial number from a barcode reader and add 1 or delete 1 stock from the database of products in woocommerce. Always it will search in SKU field in which I have all my barcodes. I would prefer if this is done without reloading the page (AJAX)