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The real-life analogy is, e.g. an outdoor temperature. You can only read it - you can't change it (realistically). In cases like this having a read-only type is appropriate.

Should BACnet client be BACNET server? I mean if program would not support I-Am and other BACnet services will other BACnet servers answer? Is it possible to have 2 BACnet devices with different UDP sockets on the same subnet and they will talk to each other? Please, point to BACnet standard. Thanks, Andrey.

In the end I created a server (which runs in the computer that's locally placed in my network) and then communicate via socket. Until I found out how implement a RemoteDevice that you said, thanks mlohbihler.

Hi there, I am kinda confuse on this and would be glad if someone can en-light me on this.

You should just send a read property to the object with the PID presentValue. Shouldn't matter whether the object is local or remote, depending on what you mean by that of course.

@drubin said: There are many lost souls out there with this basic question. Can someone please answer? Drubin, there's some place where we could find some documentation about bacnet4j ?

Thanks very much Valter.

sorry taking so long to reply friend. (I was involved in another project, but now returning to bacnet4j ) I try what you suggest but it just told me the value of the binary and the analog, which is : Object type || value Device : 8 Analog Value : 2 Binary Value : 5 What I need is a little more specific, how to know the int value of a binary input for example ?

Hi there, I am building a Servlet that will be connecting to many BACnet Controller. I want to know if there is anyway that i can identify which BACnet Object is under which BACnet Controller and how can i go about doing it? Thanks. WenJun

Hi mlohbihler, Maybe if u r interested i can send u my web project for u to take a look? Regards, WenJun

hi there, i am currently working on a way to retrieve information from a bacnet object if there are changes. Can anyone guide me on how this can be done or is there any sample for me to understand it? Thanks in advance! :)

Hi guys, i manage to set up the stuff but when I try to run the DiscoveryTest.java (with SlaveDeviceTest.java running) an error below show up in the console: Exception in thread "main" java.net.BindException: Address already in use: Cannot bind at java.net.PlainDatagramSocketImpl.bind0(Native Method) at java.net.PlainDatagramSocketImpl.bind(Unknown Source) at java.net.DatagramSocket.bind(Unknown Source) at java.net.DatagramSocket.<init>(Unknown Source) at java.net.DatagramSocket.<init>(Unknown Source) at com.serotonin.bacnet4j.npdu.ip.IpMessageControl.initialize(IpMessageControl.java:156) at com.serotonin.bacnet4j.LocalDevice.initialize(LocalDevice.java:211) at com.serotonin.bacnet4j.test.DiscoveryTest.main(DiscoveryTest.java:48 Anyone can advice on this?

Nevermind on that last post... all the test classes which compile correctly can be found in the source archive: bacnet4J-src.zip which can be found here: http://sourceforge.net/projects/bacnet4j/files/bacnet4j/1.2/ The are not in bacnet4j.jar or seroUtils.jar I would still love to know the basic design of this package or a good description of the LocalDevice and RemoteDevice classes...

Hi all, New to bacnet4j. Looking around for documentation or example code? Is there any? If not can some kind soul out there send or post example code with a comment or two describing the basic use of LocalDevice and RemoteDevice? My ultimate goal is to write a small test bacnet device and monitor that device using bacnet4j. A basic questions, I hope, in the mean time. I don't get the following code I found on here: LocalDevice localDevice = new LocalDevice(101, "192.168.1.1"); localDevice.setPort(47808); localDevice.initialize(); localDevice.getRemoteDevices(); Get remote devices from where? All I have defined is a local IP and port correct? Also what is the 101? Thanks Dan

Thanks Thomas for compliments.

Hi, Greetings! I am creating BACnet slave device using BACnet4J. For doing so I used Slave Device Test Program. It is currently supporting Read Property Request. Now, I want to add COV (Change Of Value) to be functional. Is there need of any additional code or just need to enable this functionality and How should I do it? Regards, Dinesh

Hi All, Greetings! I am new to BACnet4j. But still I am trying to work on BACnet4j. In one of my case I have to send data to like Temperature to some other BACnet enabled Software. Where as the data is present in MySql Database. I have to convert it to BACnet. Please, tell me what steps should i follow? If you gives me some sort coding examples, it will be better for me. Regards,

Hi When I discover the network for Bacnet devices I'm getting 2 remote devices but when I ask for the object list I'm getting the following error errorAPDU(choice=12, error Class=Property, error Code=Invalid array index). Do you know what's causing this error? The device itself says it supports both segmentation, MaxAPDULength = 1476 and the network number is 0. Thanks Sashi

Hi, Anyway to do this?

seroUtils.jar is available for download along with BACnet4J.