oca-technical/odoo-bringout-oca-hr-attendance-hr_attendance_rfid/hr_attendance_rfid/readme/USAGE.rst

#. The HR employee responsible to set up new employees should go to
   'Attendances -> Manage Attendances -> Employees' and register the
   RFID card code of each of your employees. You can use an USB plugged
   RFID reader connected to your computer for this purpose.
#. The employee should put his/her card to the RFID based employee
   attendance system. It is expected that the system will provide some form
   of output of the registration event.