Barcode’s work by copying and pasting the “Barcode” number onto a page. If you happened to open up a word document and scanned the barcode you would see the barcode number pasted in. The most important thing is to ensure the barcode scanner hits “Enter” after the scan. Test this out with a word document and it should start a new line after scanning. If it does not, please go through the manual of the scanner. There is usually a barcode that you scan within the manual which then configures the scanner to hit enter after you scan anything.
When looking through the manual, try and find the section to enable the "Return Key".
Then, please watch the following video for the instructions on how to add barcode numbers to the members accounts and accessing the page that you will use to scan and check everyone in: https://youtu.be/Se6d5xsX2e0