#3 SetpointReference value is Optional

[Emanuel]

The SetpointReference in the loop object is a required property, but it's value is optional. This is explained in the BACnet specifications page 431 as follows:
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BACnetSetpointReference ::= SEQUENCE {
setpointReference [0] BACnetObjectPropertyReference OPTIONAL
}
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I also included the toString() in SetPointReference and ObjectPropertyReference

Any comments or suggestions welcome.

[Emanuel]

Setpointreference and ObjectPropertyReference

[Matthew Lohbihler]

The original code in SetpointReference is sufficient:

setpointReference = readOptional(queue, ObjectPropertyReference.class, 0);