How/possible to find several devices from one physical device?

richardk

Hi

Am a neon-green BACnet-beginner. :) Have read some introductions, checked BACnet4J-examples and read a bit of the specification.

My goal is to see a bunch of non-BACnet devices in a BACnet-browser.

The problem is: how to have more then one LocalDevice on the same port (otherwise it will not receive the "How Is", right?). Another BACnet-beginner I know said he had seen something about creating sub-devices/applications, but I could not find anything about that.

Is it somehow possible to make them "share" a common port, since they have different addresses?

Any hint or suggestion are welcome.

Richard

mlohbihler

Hi Richard,

BACnet4J supports running a LocalDevice on a non-standard port. Also, when used in user/controller software it can send WhoIs requests to arbitrary ports. But, i have noted other software and devices that do not play nice with other ports, so you may still have problems.

I'm not vey familiar with some of the network-level devices that the specification talks about, but i think in general you have 4 options:

Try running on non-standard ports and see if it works. If you try this please report your findings back here as this would be interesting to know.
Run all of your devices on different hosts with the standard port
Create a single LocalDevice with backing code that communicates with your non-BACnet devices and presents them as a single device on the standard port.
Use a BACnet network device to create sub-networks as necessary to get the job done. Sorry, i can't help much more with this one.

m@

Fred

Richard,

I'm in the same boat you are. I need to expose multiple devices from a single network address.

Did you find a good way to handle this?

Regards,
Fred