I'm not very 'down with the POS' if you'd put it like that, but I do believe there are limitations as to what can be made compatible with a square system, however I managed to recall @Alans1 putting together this thread that may help you to find a great barcode scanner compatible with square.
Here are also some help articles to help makes sure that if the scanner is compatible it is connecting correctly:
https://squareup.com/help/gb/en/article/6539-connect-square-terminal-supported-hardware
https://squareup.com/help/gb/en/article/5114-connect-recommended-hardware-to-square-stand
This is also a great page to check the compatibility of your older POS devices:
https://squareup.com/gb/en/compatibility/accessories/
I hope this could help, if it did, don't hesitate to mark it as best answer to help others in the future!
I'm not very 'down with the POS' if you'd put it like that, but I do believe there are limitations as to what can be made compatible with a square system, however I managed to recall @Alans1 putting together this thread that may help you to find a great barcode scanner compatible with square.
Here are also some help articles to help makes sure that if the scanner is compatible it is connecting correctly:
https://squareup.com/help/gb/en/article/6539-connect-square-terminal-supported-hardware
https://squareup.com/help/gb/en/article/5114-connect-recommended-hardware-to-square-stand
This is also a great page to check the compatibility of your older POS devices:
https://squareup.com/gb/en/compatibility/accessories/
I hope this could help, if it did, don't hesitate to mark it as best answer to help others in the future!
The big sticking point on this is what tablet/Square hardware you're using.
Android based (including the Sq Terminal & Register) is a lot more accepting of generic barcode scanners (as they generally emulate the bigger brands anyway). With iOS there is a specific way they need to operate as iPads don't recognise the very basic number & enter command unless the curser is already in the right place for data entry - so it's mainly the socket mobile scanners that have taken the lead in this area.
If you've already got the Square hardware, have you tried just plugging it in? (You'd need a USB C hub for the terminal - you can't connect to the USB C port with a USB A to USB C adaptor & the unit has to be plugged into a power supply).
