When I tried to check out and check in more than one items at the same time wiht RFID reader it is not working properly.
Hi Naib, circulation in Koha isn't thought to work with batch checkouts right now. If you can, try increasing the delay in your RFID software between sending numbers. But there will still be issues in cases where a modal message displays for one of the items. Making things work for RFID and batch would be a new feature.
Naib, are you using the regular checkout screen or the batch checkout feature? The batch checkout should work with checkouts. It needs to be turned on. That works with RFID pads that show as a wedge keyboard. There isn't currently a way to use them for batch check in though.
This bug report is too vague and broad to be actionable. The batch checkout feature does indeed work out of the box with RFID readers. As a rule, the RFID reader needs to be configured to send one barcode every x seconds for non-batch pages, and all at once for batch pages. Tech Logic CircIt currently does this be reading the page titles to detect what speed and security mode to use for reading RFID tags. I imagine most RFID bridge software supports something like this or will require more specific development for integration.