The Agentry client comes with camera scanning enabled by default. You can activate it within Work Manager by turning on scanning for list fields or creating barcode scan fields.
If you want to use an external scanner (sled or bluetooth) you will need to build an Agentry client using the Open UI framework and the Open Scan API to enable the scanner APIs within the Agentry client.
I would recommend testing the camera scanning in your real world environments to verify it will get a good read. Depending on your environment and scanning volume you may want to go with a laser scanner instead of the camera scanner.
--Bill