Hey @terrypacker,

Please help to resolve the above queries related to BACne MS/TP.

@terrypacker Is it compulsory to start discovery on slave and master at the same time?

I am able to discover remote devices using BACnet/IP.

And the same way I am doing with MSTP. The difference between BACnet IP and MSTP is only about the connection type/ communication medium like Ethernet or serial [RS485]. Another thing related to request-response is the same. Am I correct?

According to my understanding, I have to provide the serial config details to the master node and create one local device and initialize it and do the "WhoIs" request-response.
But, currently, I am not able to get "iAmReceived" on local device listeners.
Am I wrong at any place?

Sorry terry, but I don't understand the socket bridge. Can you please give details like what should I do?

I just want to do as simple as done in the below example.
https://github.com/infiniteautomation/BACnet4J-samples/blob/master/src/test/java/com/infiniteautomation/bacnet4j/rs485/SerialTest.java

@terrypacker Thank you so much for the response.

Yes, I have used that snippet.

Here is my serial port settings,

final SerialPort serialPort = new SerialPort("COM12");
		boolean b = serialPort.openPort();
		System.out.println("port open? :: "+b);
		b = serialPort.setParams(SerialPort.BAUDRATE_38400, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
				SerialPort.PARITY_NONE);

I am able to open the port and got below success logs for it.
port open? :: true
parameter set? : true

Also with slave node, I have got below logs.
getBytesIn :: 1855
getBytesOut :: 0

With the listen() snippet given in
https://github.com/infiniteautomation/BACnet4J/blob/master/src/test/java/com/serotonin/bacnet4j/adhoc/rs485/PortTest.java

I got frames as below...
55ff0102010000f5
55ff01030100007c
55ff0104010000c6
55ff01050100004f
55ff0106010000d7
55ff01070100005e
55ff0108010000a0
55ff010901000029
55ff010a010000b1
55ff010b01000038
55ff010c01000082
55ff010d0100000b
55ff010e01000093

And still not able to discover remote devices...

Am I doing anything wrong in this?

If you have any test case with MS/TP then please share. I will be very grateful to you.

Hi,

Anyone there to guide me with this issue...

Please do the need full as I am stuck with the issue.

Thanks,
Vihangi

Hi,
I am trying to perform BACnet Master Slave communication and for that, I have done below things as given in the example.

For Master Device:

static void master(final SerialPort serialPort) throws Exception {
		try (JsscSerialPortInputStream in = new JsscSerialPortInputStream(serialPort);
				JsscSerialPortOutputStream out = new JsscSerialPortOutputStream(serialPort)) {
			final MasterNode node = new MasterNode("test", in, out, (byte) 3, 2);
			node.setMaxInfoFrames(5);
			node.setUsageTimeout(100);
			final MstpNetwork network = new MstpNetwork(node, 0);
			final Transport transport = new DefaultTransport(network);
			final LocalDevice ld = new LocalDevice(1970, transport);
			ld.initialize();
			System.out.println(prefix() + "Initialized");

			for (int i = 0; i < 10; i++) {
				System.out.println(prefix() + "Discovering");
				final RemoteDeviceDiscoverer rdd = ld.startRemoteDeviceDiscovery((r) -> {
					System.out.println(prefix() + "Device: " + r + ", " + r.getName());
				});

				ThreadUtils.sleep(6000);

				System.out.println("remote device list :: "+rdd.getRemoteDevices());
				rdd.stop();
			}

			System.out.println(prefix() + "Terminating");
			ld.terminate();
		}
	}

For Slave Device:

static void slave(final SerialPort serialPort) throws Exception {
		try (JsscSerialPortInputStream in = new JsscSerialPortInputStream(serialPort);
				JsscSerialPortOutputStream out = new JsscSerialPortOutputStream(serialPort)) {
			final SlaveNode node = new SlaveNode("test", in, out, (byte) 3); //Creating mstp node and place it in ideal state
			final MstpNetwork network = new MstpNetwork(node, 0);
			final Transport transport = new DefaultTransport(network);
			final LocalDevice ld = new LocalDevice(111, transport);
			ld.initialize();

			ld.startRemoteDeviceDiscovery((r) -> {
				System.out.println("Get instance number: "+r.getInstanceNumber());
			});

			ThreadUtils.sleep(100000);
			System.out.println("getBytesIn :: "+node.getBytesIn());
			System.out.println("getBytesOut :: "+node.getBytesOut());

			ld.terminate();
		}
	}

But still not able to discover the remote devices.
Is there anything that I miss or any mistake I have done?

I think it's probably obvious that I am new to BACnet and the BACnet4J library. I would be super grateful for any help!

Thank you,
Vihangi

Hi @terrypacker

This is just a gentle reminder of the above query. So, I can conclude my confusion.

Please guide me as soon as possible.

Regards,
Vihangi

Hi @terrypacker
Thanks for the response.

Actually I have check the library and found some classes regarding Network security which is as below.
com.serotonin.bacnet4j.type.constructed -> KeyIdentifier
com.serotonin.bacnet4j.type.constructed -> SecurityKeySet
com.serotonin.bacnet4j.type.enumerated -> ObjectType [network security as Object type]

This object has different properties to set security key points such as

• baseDeviceSecurityPolicy
• networkAccessSecurityPolicies
• keySets
• lastKeyServer
• supportedSecurityAlgorithms
  and many more...

Thus, I am asking to understand these things with practical analysis.

So, If possible then please provide an example so I can understand it.

Hi
I am new to the BACnet4J library and I want to know how this library will providing network security features of BACnet protocol.

Please guide me for the same as soon as possible.

Regards,
Vihangi

Still not able to read Log buffer values.
Got same Error:
ErrorAPDU(errorClass=property, errorCode=invalid-data-type,errorClass=property, errorCode=invalid-data-type) Error: ErrorAPDU(errorClass=property, errorCode=invalid-data-type,errorClass=property, errorCode=invalid-data-type), originalInvokeId=18

Please help me with this.

Hi,
I want to know, how to configured intrinsic and algorithmic reporting for remote device objects?

According to examples, We need to create objects using BACnetObject class and then we can add support of reporting to that object by "supportIntrinsicReporting(int, int, float, float, float, LimitEnable, EventTransitionBits, NotifyType, int)" API.
But, for the remote device, we already have device objects and we will use that object using ObjectIdentifier. And that will not give mapping to BACnetObject instance. Then, how can we do it for a remote device?