BACnet Endpoint Properties

objectType (string, enum, required)

Identifier of the BACnet object type of this endpoint

This element must be one of the following enum values:

• analog-input

• analog-output

• analog-value

• binary-input

• binary-output

• binary-value

• multi-state-input

• multi-state-output

• multi-state-value

• accumulator

• pulse-converter

• trend-log

• trend-log-multiple

• event-log

• integer-value

• large-analog-value

• positive-integer-value

• characterstring-value

• octetstring-value

• bitstring-value

• date-value

• time-value

• datetime-value

• date-pattern-value

• time-pattern-value

• datetime-pattern-value

• calendar

• schedule

• lighting-output

• binary-lighting-output

• channel

• life-safety-point

• life-safety-zone

• access-point

• access-zone

• access-door

• access-user

• access-rights

• access-credential

• credential-data-input

• lift

• escalator

• elevator-group

• staging

• group

• global-group

• structured-view

• event-enrollment

• alert-enrollment

• notification-class

• notification-forwarder

• command

• loop

• program

• averaging

• load-control

• network-port

• network-security

• device

• file

Example: "analog-input"

objectInstance (integer, required)

Integer number to describe the concrete object instance that should be accessed. ASHRAE 135 §20.2.14 bounds the instance to 22 bits (0-4194303).

Example: 1

Additional restrictions:

• Maximum: 4194303

property (string, required)

BACnet property name (e.g., 'present-value', 'status-flags', 'units', 'priority-array', 'object-name'). 'present-value' is the most common for I/O objects.

Example: "present-value"

interval (integer)

Polling interval in milliseconds. Default 1000. Set this conservatively for legacy controllers (Trend IQ4, Andover) at 5000-15000 ms to avoid TSM exhaustion on the shared process iid pool.

Default: 1000

Example: 1000

Additional restrictions:

• Minimum: 100

cronExpression (string)

The Cron expression used to poll the endpoint. (For examples, see: https://github.com/node-cron/node-cron)

Examples: "1,2,4,5 * * * *", "1-5 * * * *", "*/2 * * * *", "* * * January,September Sunday"

priority (integer)

Write priority per ASHRAE 135 §19.2 / Table 19-1 (1-16). 1 = highest (life-safety), 6 = critical equipment control, 8 = manual operator override, 16 = lowest / relinquish to default. Default 15; set explicitly for any commandable output. Writing NULL at any priority relinquishes that level. Operators competing at the same priority overwrite each other silently.

Example: 16

Additional restrictions:

• Minimum: 1

• Maximum: 16

propertyTag (integer)

Application tag (ASHRAE 135 §20.2.1) — forces the data type for writes when the device's expectation differs from JS-side type inference. Standard tags 0-12: 0=NULL, 1=BOOLEAN, 2=UNSIGNED_INT, 3=SIGNED_INT, 4=REAL, 5=DOUBLE, 6=OCTET_STRING, 7=CHARACTER_STRING, 8=BIT_STRING, 9=ENUMERATED, 10=DATE, 11=TIME, 12=OBJECT_IDENTIFIER. Tags 13-15 are reserved by ASHRAE. Omit for reads.

Example: 4

Additional restrictions:

• Maximum: 12