Can I have a configuration way to configure the own barcode which from weighing scales?

The only way to scann a barcode with Loyverse POS is if you have added it previosly to the item. Loyverse doesn't integrate with elecronic scales so unfortunately it's not possible to scann the barcodes generated by them. You would need to add the weight manually at the POS app at the checkout.

yes there is such an opportunity.

To use this feature, log in to your Back Office, click on the Settings icon on the left menu bar to go to the System settings. 
In the ‘Features’ section, switch on the parameter for ‘Barcodes with embedded weight’.  Click the ‘Save’ button.



For more details check help article: How to Scan Barcodes with Embedded Weight