I have set a customers system to print a barcode on the receipt so that it can be scanned using a barcode scanner to bring back up the order in the future.
Customer also wants login via RFID fobs, is there any way to have different actions for different numberpad values? If I have a fob with the pin 2300 and an order number 2300 surely scanning the fob will bring up order 2300 or scanning the receipt will log in the user associated with pin 2300?
length or prefix would be a good way to separate the flows.
if it were me I would add a prefix to the barcode printed since its likely your rfids are pre-encoded, then use that to specify the scan process then use a script or function to remove the prefix in the first part of the flow.