Access Code Requirements for Door Locks

Learn about the specific requirements and constraints for setting access codes on door locks.

Some models of door locks have specific requirements and constraints when it comes to setting PIN codes. It's essential to be aware of these to ensure seamless functionality and security. The requirements can be fetched by making a Get Device or List Devices (or Get Lock or List Locks) request.

Sample set of access code requirements:

{
  "device": {
    "device_id": "00000000-0000-0000-0000-000000000000",
    "capabilities_supported": [
      "access_code",
      "lock"
    ],
    "properties": {
      "supported_code_lengths": [
        4,
        5,
        6,
        7,
        8
      ],
      "max_active_codes_supported": 250,
      "code_constraints": [
        {
          "constraint_type": "no_zeros"
        },
        {
          "constraint_type": "name_length",
          "min_length": 1,
          "max_length": 12
        }
      ],
      "supports_backup_access_code_pool": true
      ...
    },
    ...
  },
  ...
}

Request:

pprint(seam.locks.get(device="ed4bb795-f29f-43e5-bc0f-35f69f9141b5"))

Response:

Device(device_id='ed4bb795-f29f-43e5-bc0f-35f69f9141b5',
       device_type='nuki_lock',
       location=None,
       properties={'battery': {'level': 0.86, 'status': 'full'},
                   'battery_level': 0.86,
                   'code_constraints': [{'constraint_type': 'cannot_start_with_12'},
                                        {'constraint_type': 'no_zeros'},
                                        {'constraint_type': 'name_length',
                                         'max_length': 20}],
                   'has_native_entry_events': True,
                   'image_alt_text': 'Nuki Smart Lock 3.0 Pro Black, Front',
                   'image_url': 'https://connect.getseam.com/assets/images/devices/nuki_smart_lock_3_pro_black.png',
                   'keypad_battery': {'level': 1},
                   'locked': False,
                   'manufacturer': 'nuki',
                   'model': {'display_name': 'Lock',
                             'manufacturer_display_name': 'Nuki'},
                   'name': 'Office Lock',
                   'nuki_metadata': {'device_id': '3',
                                     'device_name': 'Office Lock',
                                     'keypad_battery_critical': False},
                   'online': True,
                   'supported_code_lengths': [6],
                   'supports_backup_access_code_pool': True},
       capabilities_supported=['access_code', 'lock'],
       errors=[],
       warnings=[],
       connected_account_id='cac74c00-443b-440f-820e-e2907277fd9f',
       workspace_id='398d80b7-3f96-47c2-b85a-6f8ba21d07be',
       created_at='2023-10-19T04:43:40.852Z',
       is_managed=True)

Supported Code Lengths

This property is denoted as supported_code_lengths and contains an array of numbers. These numbers represent the various lengths (in terms of digits) allowed for a PIN code. For example, if the array contains [4, 6], it means the door lock can accept 4-digit or 6-digit PIN codes.

Example Payload:

"supported_code_lengths": [
    4,
    5,
    6,
    7,
    8
]

Maximum Set Codes

The property max_active_codes_supported indicates the total number of codes that can be simultaneously set on a door lock. For the door locks that accommodate native scheduling, this count will includes future scheduled codes that are set on the lock.

Example Payload:

"max_active_codes_supported": 250

PIN Code Constraints

The code_constraints property gives insight into various conditions or limitations that apply to PIN codes. Each constraint in the code_constraints array is an object with at least the constraint_type property.

Example Payload:

"code_constraints": [
    {
        "constraint_type": "no_zeros"
    },
    {
        "constraint_type": "name_length",
        "min_length": 1,
        "max_length": 12
    }
]

The constraint_type property can be one of the following:

Constraint TypeDescription

no_zeros

0s cannot be used as digits in the pin code.

cannot_start_with_12

The pin code cannot start with the sequence of digits 12.

no_triple_consecutive_ints

No more than 3 digits in a row can be consecutive or the same in the pin code.

cannot_specify_pin_code

A pin code cannot be specified - it has to be left empty and one will be generated by the lock provider.

pin_code_matches_existing_set

If a pin code is specified, it must match an existing set of pin codes used in the account (for example, pin code matches the code assigned to a user in the system).

start_date_in_future

For time-bound codes, the start date has to be in the future.

name_length

The name of the code has some restrictions on length. When the constraint_type is name_length, the constraint object has one or two additional properties called min_length and max_length to specify the length constraints.

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