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Any other Suggestions as to what it might be?

Good day,

We are trying to develop bacnet explorer using bacnet4j. the thing is that this explorer will not be in the same subnet as the bacnet controller most of the time. We can send who-is messages to the local broadcast address with destination network address 65535. We are trying to figure out how we can achieve the same when we are not in the same network as bacnet controller but we know the IP of the bacnet controller.

Does bacnet4j support it?

Thanks

You could use Mango as a platform for this but it might be a bit over kill. We have started developing an API for Mango. We don't currently have API features for the discovery tool but that will be added at some point. You could then use pure JavaScript / HTML5 to build a UI that sits on top of Mango to do all the functions that you want. Again this will only be possible once we build the API features for the BACnet discovery which I don't have a timeline but I would say it will be this year.

Yeah, still not the information i was hoping for. Do you use COV in your points? Also, what kind of event is raised: a device exception, or a message exception? Sorry for all the questions, but it would be great to track this down. Could you provide a chuck of the events so that i can check the timestamps for any clues?

hi

i found that a service was using UDP port 47808 so i disable this and it is now working!

Iain

Hi Everyone;

I couldnt find a way create an event enrollment with a multistate value (cant set alarm values).

Has anyone an example sending alarm using event notification,enrollment and multistate value?

Thanks

Hi
I'm using bacnet4j stack from 3 tears ago and not able to unsubscribe to COV although the PDU response for unsubscribe is success.
registration is for life time and the way I Subscribe and Unsubscribe is as follow:

Subscribe:

req = new SubscribeCOVRequest(new UnsignedInteger(1), aoid, new Boolean(true), new UnsignedInteger(0));
ocalDevice.send(d, req);

Unsubscribe:

localDevice.send(rd, new SubscribeCOVRequest(1, oid, null, null));

BTW:Is the process Id number should be same ?

This morning it works again. Still don't understand why... Is this a bug? There something I'm missing?

Thank you.

According to the standard, BACnetLogData is a choice of log-status, log-data or time-change.

However, looking at com.serotonin.bacnet4j.type.constructed.LogData.java:```
public LogData(ByteQueue queue) throws BACnetException {
logStatus = read(queue, LogStatus.class, 0);
logData = readSequenceOfChoice(queue, classes, 1);
timeChange = read(queue, Real.class, 2);
}

@Override public void write(ByteQueue queue) { write(queue, logStatus, 0); write(queue, logData, 1); write(queue, timeChange, 2); } By changing public LogData(ByteQueue queue) throws BACnetException { logStatus = read(queue, LogStatus.class, 0); logData = readSequenceOfChoice(queue, classes, 1); timeChange = read(queue, Real.class, 2); } public LogData(ByteQueue queue) throws BACnetException { int tag = peekTagNumber(queue); if (tag == 0) { logStatus = read(queue, LogStatus.class, 0); logData = null; timeChange = null; } else if (tag == 1) { logStatus = null; logData = readSequenceOfChoice(queue, classes, 1); timeChange = null; } else if (tag == 2) { logStatus = null; logData = null; timeChange = read(queue, Real.class, 2); } else { throw new BACnetErrorException(ErrorClass.property, ErrorCode.missingRequiredParameter); } }

Thanks now it compiles :) (after i added one more jar file - seroUtils.jar).

Hey there,
I'm running into a little trouble changing PresentValues of data points while the device which is sending the WritePropertyRequest is also subscribed to Confirmed COV notifications of that data point.

This is the error my device receives:

com.serotonin.bacnet4j.exception.ErrorAPDUException: ErrorAPDU(choice=127, errorClass=Device, errorCode=Operational problem) at com.serotonin.bacnet4j.transport.Transport.send(Transport.java:202) at com.serotonin.bacnet4j.LocalDevice.send(LocalDevice.java:370)

I'm not exactly sure what choice=127 means, but for some reason the target device doesn't process the WriteProperty request. Oddly enough, WriteProperty requests which are quickly sent after the first actually are successful.
Also, when using the UnconfirmedCOV service, WriteProperty requests do not produce any errors, and properties are written without issues.

Could this be a bug?

I am new to bacnet4j and need some help understanding how the slaveDevicetest Local device would respond to a ReadProperties request. I dont see any indication in the Listener
instance that would give an indication that a readproperty request was received.
Do I need to add the readproperty request to the event handler??

Any suggestions would be greatly appreciated.

Bill

Ah found it in System Settings.
There I found a setup section for BACnet. There I could select the address of the Mango Server Computer instead of 0.0.0.0::47808
Now it works perfectly.
Just a silly beginners problem.
Regards
TJ

After working more intensively with BACnet4J, I came to the conclusion that it is not supported.

The BACnet standard states that any attempt to read the LogBuffer property of a Trendlog or Trendlog Multiple object with a ReadProperty-Request or a ReadPropertyMultiple-Request shall cause a a Result(-) response, with an Error class of PROPERTY, and an Error Code of READ_ACCESS_DENIED.
Currently BACnet4j does not do this.
I've created a couple of patches which I believe fix this:

diff --git a/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java b/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java --- a/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java +++ b/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java @@ -44,6 +44,8 @@ import com.serotonin.bacnet4j.type.constructed.ReadAccessResult.Result; import com.serotonin.bacnet4j.type.constructed.ReadAccessSpecification; import com.serotonin.bacnet4j.type.constructed.SequenceOf; +import com.serotonin.bacnet4j.type.enumerated.ErrorClass; +import com.serotonin.bacnet4j.type.enumerated.ErrorCode; import com.serotonin.bacnet4j.type.enumerated.PropertyIdentifier; import com.serotonin.bacnet4j.type.primitive.ObjectIdentifier; import com.serotonin.bacnet4j.type.primitive.OctetString; @@ -151,7 +153,10 @@ else { // Get the specified property. try { - results.add(new Result(pid, pin, obj.getPropertyRequired(pid, pin))); + if (pid.equals(PropertyIdentifier.logBuffer)) + results.add(new Result(pid, pin, new BACnetError(ErrorClass.property, ErrorCode.readAccessDenied))); + else + results.add(new Result(pid, pin, obj.getPropertyRequired(pid, pin))); } catch (BACnetServiceException e) { results.add(new Result(pid, pin, new BACnetError(e.getErrorClass(), e.getErrorCode())));

diff --git a/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java b/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java
--- a/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java
+++ b/src/com/serotonin/bacnet4j/service/confirmed/ReadPropertyMultipleRequest.java
@@ -44,6 +44,8 @@
import com.serotonin.bacnet4j.type.constructed.ReadAccessResult.Result;
import com.serotonin.bacnet4j.type.constructed.ReadAccessSpecification;
import com.serotonin.bacnet4j.type.constructed.SequenceOf;
+import com.serotonin.bacnet4j.type.enumerated.ErrorClass;
+import com.serotonin.bacnet4j.type.enumerated.ErrorCode;
import com.serotonin.bacnet4j.type.enumerated.PropertyIdentifier;
import com.serotonin.bacnet4j.type.primitive.ObjectIdentifier;
import com.serotonin.bacnet4j.type.primitive.OctetString;
@@ -151,7 +153,10 @@
else {
// Get the specified property.
try {

results.add(new Result(pid, pin, obj.getPropertyRequired(pid, pin))); if (pid.equals(PropertyIdentifier.logBuffer)) results.add(new Result(pid, pin, new BACnetError(ErrorClass.property, ErrorCode.readAccessDenied))); else results.add(new Result(pid, pin, obj.getPropertyRequired(pid, pin))); } catch (BACnetServiceException e) { results.add(new Result(pid, pin, new BACnetError(e.getErrorClass(), e.getErrorCode())));

On the recipient side, SubscribeCOV is supported, but not SubscribeCOVProperty.

I implemented my own SlaveDevice and it is supporting SubscribeCOV but not SubscribeCOVProperty. But I would like to subscribe just one property, not all. How Can I achieve that my slavedevice supports this?

Next question, in hopes that I get an answer eventually ;)

Is it possible to detect which type data has to be I want to write?

With the SlaveDeviceTest it works, but unfortunately not with VTS.

If the Bacnet console asks for information that is larger than the frame size, Transport->sendResponse() will use network->sendSegmented instead of network->sendAPDU. sendAPDU works great but sendSegmented is having problems with keys in the waiting room. When it sends the first segment Transport->sendSegments always comes back with a null response. This is causing a lot of hangs in the console as it waits for information. The console appears to be sending the correct response based on Wireshark.

Can you set it in your bootup scripts? If on linux you can put it either in the system startup or in the service script.