pos/pos_price_to_weight/demo/product_product.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (C) 2017 - Today: GRAP (http://www.grap.coop)
@author Sylvain LE GAL (https://twitter.com/legalsylvain)
License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-->

<odoo>

    <record id="product_price_to_weight_barcode" model="product.product">
        <field name="name">Apples (with Price To Weight Barcode)</field>
        <field name="barcode">0212345000007</field>
        <field name="list_price">1.50</field>
        <field name="uom_id" ref="product.product_uom_kgm"/>
        <field name="uom_po_id" ref="product.product_uom_kgm"/>
    </record>

</odoo>