ObjectProperties.add() has private access in
Making a gateway I need to map a proprietary point attributes to BACnet point properties. However, some of the attributes do not have a standard equivalent on the BACnet side. For example, we have multiple alarm levels on the analog value object (HiLevel1=warning, HiLevel2=alarm, HiLevel3=fault), etc. I really did not find any way how to add proprietary (custom) properties to a standard BACnet object except to modify the original code.