Hi everyone,
i finally found it what was my mistake, so i replace by this and works fine!

            if (i == 4){
                for (int k = 1; k <=16; k++){
                    setPresentValue(addr, read, oid, new com.serotonin.bacnet4j.type.primitive.Boolean(true) , k); // alternate between true and false input
                }
            }

Thank you Serotonin by this great project, really thanks!

@mlohbihler said:

Use read property requests with the present value property identifier.

I did as you said :

    public String getPresentValue(LocalDevice localDevice, ObjectIdentifier oid) throws Exception {
        ReadPropertyRequest rpr = new ReadPropertyRequest(oid, PropertyIdentifier.presentValue);
        ReadPropertyAck rpa = (ReadPropertyAck) localDevice.send(isa, null, 1476, Segmentation.segmentedReceive, rpr);

        SequenceOf<ObjectIdentifier> sOis = (SequenceOf<ObjectIdentifier>) rpa.getValue();

        List<ObjectIdentifier> ois = new ArrayList<ObjectIdentifier>();
        for (ObjectIdentifier oi : sOis) {
            System.out.println("--> " + oi.getObjectType().intValue());
        }
        
        
        return rpa.getValue().toString();
    }

But it gives this follow error:

java.lang.ClassCastException: com.serotonin.bacnet4j.type.primitive.Real cannot be cast to com.serotonin.bacnet4j.type.constructed.SequenceOf
	at brainset.bacnet4j.Supervisory.getPresentValue(Supervisory.java:123)

What I'm trying to do is scan my device and know what kind of points I have, if is a analog output, analog input, etc.
And store these points values in my List<...>.

@mlohbihler said:

Valter,

You are incorrect in thinking that an analog can only be an input or an output. There are three possible analog types: input, output, and value. Your object is a value.
Ow, got it mlohbihler.

There's some way to get the values from the input and output objects ?

This is how I'm doing to get these values :

    private List<ObjectIdentifier> getListObjectIdentifier(LocalDevice localDevice) throws Exception {
        ReadPropertyRequest rpr = new ReadPropertyRequest(new ObjectIdentifier(ObjectType.device, deviceID), PropertyIdentifier.objectList);
        ReadPropertyAck rpa = (ReadPropertyAck) localDevice.send(isa, null, 1476, Segmentation.segmentedBoth, rpr);

        SequenceOf<ObjectIdentifier> sOis = (SequenceOf<ObjectIdentifier>) rpa.getValue();

        List<ObjectIdentifier> ois = new ArrayList<ObjectIdentifier>();
        for (ObjectIdentifier oi : sOis) {
            ois.add(oi);
        }

        return ois;
    }

@mlohbihler said:

That object, "oi", is not an "output" or an "input"; it is a "value", which is a valid third type of bacnet input. "Value"s are basically both input and output.
So, what should I do to get the exact type of the object ?
I mean, how do I know if is a analog output or analog input ?

I have some objects that I must to know which is the exactly the value of this object, if it's analog OUTPUT or analog INPUT, got it ?

For example:
If you I did this :

            System.out.println("oi.getObjectType().intValue(): " + oi.getObjectType().intValue());
            
            System.out.println("ObjectType.analogOutput.intValue(): " + ObjectType.analogOutput.intValue());
            System.out.println("ObjectType.analogInput.intValue(): " + ObjectType.analogInput.intValue());
            System.out.println("ObjectType.analogValue.intValue(): " + ObjectType.analogValue.intValue());

Which the answer gonna be:

oi.getObjectType().intValue(): 2
ObjectType.analogOutput.intValue(): 1
ObjectType.analogInput.intValue(): 0
ObjectType.analogValue.intValue(): 2

But I need to know if is OUTPUT (1) or INPUT (0).
How can I do that ?

I have some objects that I must to know which is the exactly the value of this object, if it's analog OUTPUT or analog INPUT, got it ?

For example:
If you I did this :

            System.out.println("oi.getObjectType().intValue(): " + oi.getObjectType().intValue());
            
            System.out.println("ObjectType.analogOutput.intValue(): " + ObjectType.analogOutput.intValue());
            System.out.println("ObjectType.analogInput.intValue(): " + ObjectType.analogInput.intValue());
            System.out.println("ObjectType.analogValue.intValue(): " + ObjectType.analogValue.intValue());

Which the answer gonna be:

oi.getObjectType().intValue(): 2
ObjectType.analogOutput.intValue(): 1
ObjectType.analogInput.intValue(): 0
ObjectType.analogValue.intValue(): 2

But I need to know if is OUTPUT (1) or INPUT (0).
How can I do that ?

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.

@mlohbihler said:

I don't think so, but it's not hard. The only trick is that you need to know the instance id of the device.

RemoteDevice rd = new RemoteDevice(...);
localDevice.addRemoteDevice(rd); // This may not actually be necessary
localDevice.send(rd, myRequest);

Where "myRequest" is, say, a read property with pid of objectList. If your setting are correct, you should get the object list of the remote device.

I found the id of my device, it's 101, but I have some doubts about it :

    public static void main(String[] args) throws Exception {
        // How to initialize the LocalDevice ?
        LocalDevice ld = new LocalDevice (???);

        // let's say my ip is : 1.2.3.4, is this correct ?
    	RemoteDevice rd = new RemoteDevice(101, new Address(new byte[] { (byte) 1, (byte) 2, 3, (byte) 4 }, 47808), null);
        ld.addRemoteDevice(rd);

        // now I have the remote device, in the localDevice, now I should be able to use the method 'getObjectList()' ?
       
        // how to use this 'myRequest' (I don't understand what you said about it ) ?
        localDevice.send(rd, myRequest);
        ...
}

@mlohbihler said:

Hi Valter,

What do you mean by remote? I suspect you mean a device with which you cannot exchange a WhoIs/IAm, but please confirm.

If this is the case, you will need to manually instantiate a RemoteDevice by explicitly providing the IP, port, and instance id. Then, you will be able to send messages to it.

Regarding using a domain name, BACnet only deals with IP addresses, so you will need to handle domain name resolution yourself.

I mean, a device that is not in my network.
There's some example in the test folder that could use for that ?

Pine,
I'm trying to read value using bacnet4j too.

Could you please tell which code do you use to do that ?
I did this locally, but not remotely.

Thank you very much.

@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 ?