Let the residents decide whether to remember a PIN code or carry an RFID card with them. You can even set the system to require both for access at night. Identification using a PIN code is also useful for one-off access. Does the heating in the building need to be inspected? The user can send the technician a one-off code for access to the utility room and leave it up to them when they come to do the job.
2N Access Commander - IP Access Control System2N Access Unit M Smart Reader
2N Intercom Systems: