Why doesn't Lightspeed require them or generate them?
While Lightspeed doesn't populate the SKU field with any data, it does auto generate a System ID for each item. The SKU fields are intended for anyone to put their own SKUs should they need them. They are not "required" fields because not everyone uses them, some people operate solely off of Descriptions and manual searches.
Hope this helps!
But LS does require you to print a barcode when using the label print feature. You'd think if not requiring a sku it would give the option to remove the barcode.
It's not quite that Lightspeed Requires you to print a barcode but rather that the System ID number is generated into a barcode that gets permanently attached to the item's label section unless you custom-code it to disappear. (This is usually done by a custom-coding firm or 3rd party coder)
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And what is the make up of the barcode?
It looks like it is the system id with an extra digit at the end.
What is the meaning of the last character?
The makeup of the barcode is based off of the symbology which is EAN-13, with us. There's an equation that determines the barcode number, but this isn't something we would have within the software, those identifiers should be the system ID with that symbology associated to it.
Hope this clarifies things!
Right, so it is an EAN-13 barcode.
The first 12 digits are the System ID of the product.
What does the thirteenth digit represent?
The 13th digit is a check-digit that, as I mentioned, is based off of a calculation of the previous 12 numbers.
To calculate it manually, you can use this chart : https://www.gs1.org/services/how-calculate-check-digit-manually
Since it's a calculation, it'll vary by the previous numbers.
Otherwise, if you put your SystemID codes in an excel spreadsheet on cell A2, ou can use this excel formula to help you determine it.
This formula gives the code concatenated with the check digit (considering that the code in on the cell A2):
Hope this clarifies :)