If you use identification cards or wristbands to control the access, it is necessary to read and add them to the system logs.
Usually, for access control purposes the system records the unique identifier that all cards have, the UID.
In order to read this UID and transfer it to the application you can use readers with keyboard emulation.
Depending on the technology of the wristband or the card, the following readers could be used:
-MIFARE
-RFID 125Khz