These are the steps to enable the barcode reader on the XPC12 (Coppernic C One2) Device.
As a prerequisite make sure you have the CopperApps repository installed:
https://developer.coppernic.fr/#/copperapps
From here, download the barcode manager and Core Services if not present on the device:
https://developer.coppernic.fr/#/os/factory_reset?id=c-one%c2%b2-id-platform
https://developer.coppernic.fr/#/barcode/manager?id=configure-the-barcode39s-service
Finally, remap the keys:
https://developer.coppernic.fr/#/products/cone?id=key-mapping
Below is a video of how to do this: