Do you mean WhoIsRequest? You could elect to send another WhoIs in certain situations (such as not finding all the devices you expect, on a timer, etc) but you'll note that the LocalDevice::getRemoteDevice method calls RemoteDeviceFinder.findDevice (at least in the most recent version of it) which will specifically send the WhoIs for that device. Recall that there is the device cache in the local device to prevent retrying device resolution over and over rapidly if a device isn't found.

Hi Michele,

I am not an expect on the BACnet4J code, but I do try to dabble and help people a little when I can. But,

I think you cannot have an UnsignedInteger for a object with the type of AnalogInput. Looking in ObjectProperties suggests the following support a presentValue property set to the UnsignedInteger type:

ObjectType. accumulator command multiStateInput multiStateOutput multiStateValue positiveIntegerValue

So it sounds to me like you may be looking for,

systemStatus1 = new BACnetObject(localDevice, localDevice.getNextInstanceObjectIdentifier(ObjectType.positiveIntegerValue)); systemStatus1.setProperty(PropertyIdentifier.objectName, new CharacterString("System status group 1")); systemStatus1.setProperty(PropertyIdentifier.units, EngineeringUnits.noUnits); systemStatus1.setProperty(PropertyIdentifier.presentValue, new UnsignedInteger(65535)); localDevice.addObject(systemStatus1);

I do agree with you in that the priority is working with valid messages; however any improvement with handling the corner cases would be welcomed. :wink:

My application is basically the BACnet4J sample application:

LocalDevice localDevice = new LocalDevice(1968, "10.1.10.168"); localDevice.getConfiguration().setProperty(PropertyIdentifier.objectName, new CharacterString("my device")); localDevice.setPort(0xBAC0); // a few properties... // Start the local device. localDevice.initialize(); // Send an iam. localDevice.sendBroadcast(47808, localDevice.getIAm());

You can dowload the test client from http://www.bac-test.com/download.php and you'll get the same errors as I get.

It works! Many thanks! :mrgreen: :mrgreen: :mrgreen: