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    How read and write values from local devices ?

    BACnet4J general discussion
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    • V
      Valter Henrique
      last edited by

      Hi everyone,
      based in examples i'm trying to write in my digital output, here's my code:

      
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.bacnet.test;

import com.serotonin.bacnet4j.LocalDevice;
import com.serotonin.bacnet4j.Network;
import com.serotonin.bacnet4j.RemoteDevice;
import com.serotonin.bacnet4j.RemoteObject;
import com.serotonin.bacnet4j.service.acknowledgement.ReadPropertyAck;
import com.serotonin.bacnet4j.service.confirmed.ReadPropertyRequest;
import com.serotonin.bacnet4j.service.confirmed.WritePropertyRequest;
import com.serotonin.bacnet4j.type.Encodable;
import com.serotonin.bacnet4j.type.constructed.SequenceOf;
import com.serotonin.bacnet4j.type.enumerated.ObjectType;
import com.serotonin.bacnet4j.type.enumerated.PropertyIdentifier;
import com.serotonin.bacnet4j.type.enumerated.Segmentation;
import com.serotonin.bacnet4j.type.primitive.Null;
import com.serotonin.bacnet4j.type.primitive.ObjectIdentifier;
import com.serotonin.bacnet4j.type.primitive.Real;
import com.serotonin.bacnet4j.type.primitive.UnsignedInteger;
import java.net.InetAddress;
import java.net.InetSocketAddress;

/**
 *
 * @author Valter
 */
public class Light {

    private static LocalDevice localDevice;

    public static void main(String[] args) throws Exception {
        localDevice = new LocalDevice(101, "192.168.1.255");
        localDevice.setPort(47808);
        localDevice.initialize();

        // Find the device
        if (localDevice.getRemoteDevices().isEmpty()) {
            System.out.println("No remote devices responded");
        }

        getObjectList(localDevice, "192.168.1.149", 0xBAC0, 101);

        localDevice.terminate();
    }

    private static void getObjectList(LocalDevice localDevice, String ip, int port, int deviceId) throws Exception {
        InetSocketAddress addr = new InetSocketAddress(InetAddress.getByName(ip), port);
        ReadPropertyRequest read = new ReadPropertyRequest(new ObjectIdentifier(ObjectType.device, deviceId), PropertyIdentifier.objectList);
        ReadPropertyAck ack = (ReadPropertyAck) localDevice.send(addr, null, 1476, Segmentation.segmentedBoth, read);

        System.out.println("IP: " + ip);
        SequenceOf<ObjectIdentifier> oids = (SequenceOf<ObjectIdentifier>) ack.getValue();
        
        int i = 0;
        for (ObjectIdentifier oid : oids) {
            System.out.println("--------  " + oid.getInstanceNumber());
            //System.out.println();
            
            //1 : not writable
            //2 : writable
            //3 : not writable
            //4 : writable

            // Rotator
//            if (i == 2){
//                for (int j = 1; j <=16; j++){
//                    setPresentValue(addr, read, oid, new Real(16), j);
//                }
//            }
            // 4 it's a lamp that i'm trying to on
            if (i == 4){
                for (int k = 1; k <=16; k++){
                    setPresentValue(addr, read, oid, new Null(), k);
                }
            }
            i++;
        }

    }

    private static void setPresentValue(InetSocketAddress addr, ReadPropertyRequest read, ObjectIdentifier objectIdentifier, Encodable value, int priority) throws Exception {
        WritePropertyRequest wpr = new WritePropertyRequest(objectIdentifier , PropertyIdentifier.presentValue, null, value, new UnsignedInteger(priority));
        localDevice.send(addr, null, 1476, Segmentation.segmentedBoth, wpr);
    }
}

      But nothing happens..
      Any help ?

      Thanks.

      1 Reply Last reply Reply Quote 0
      • V
        Valter Henrique
        last edited by

        Hi guys,

        someone could help me please ?

        I really need to read/ write some values from my device.

        Please.

        Best regards,
        Valter Henrique.

        1 Reply Last reply Reply Quote 0
        • V
          Valter Henrique
          last edited by

          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!

          1 Reply Last reply Reply Quote 1
          • V
            Valter Henrique
            last edited by

            Hi everyone,

            i need to read the values of my objects, i only can read the instance number:

            
    private static void getObjectList(LocalDevice localDevice, String ip, int port, int deviceId, float value) throws Exception {
        InetSocketAddress addr = new InetSocketAddress(InetAddress.getByName(ip), port);
        ReadPropertyRequest read = new ReadPropertyRequest(new ObjectIdentifier(ObjectType.device, deviceId), PropertyIdentifier.objectList);
        ReadPropertyAck ack = (ReadPropertyAck) localDevice.send(addr, null, 1476, Segmentation.segmentedBoth, read);

        System.out.println("IP: " + ip);
        SequenceOf<ObjectIdentifier> oids = (SequenceOf<ObjectIdentifier>) ack.getValue();

        int i = 0;
        for (ObjectIdentifier oid : oids) {
            System.out.println("--------  " + oid.getInstanceNumber());
        }

    }

            But how read the value of each object ?
            For example, i would like to read '15' from my analog output object, o true or false from my digital values and go on.
            image

            I try to write this code:

            
        InetSocketAddress addr = new InetSocketAddress(InetAddress.getByName(ip), port);
        ReadPropertyRequest read = new ReadPropertyRequest(new ObjectIdentifier(ObjectType.analogOutput, deviceId), PropertyIdentifier.priorityArray);
        ReadPropertyAck ack = (ReadPropertyAck) localDevice.send(addr, null, 1476, Segmentation.segmentedBoth, read);
        PriorityArray priorityArray = (PriorityArray) ack.getValue();

        float priority = priorityArray.get(16).getRealValue().floatValue();
        System.out.println("priorityArray = " + priority);

            But is not working.

            Could anyone help me with this please ?

            Best regards,
            Valter Henrique.

            1 Reply Last reply Reply Quote 0
            • G
              Guven_Ulu
              last edited by

              Hi Valter,

              Are you using the bacnet device in real environment or simulating a virtual device in your computer and make a java program to read/write values ?

              If you are simulating it, Which program are you using to simulate the bacnet device ?

              Thanks

              1 Reply Last reply Reply Quote 0
              • V
                Valter Henrique
                last edited by

                Hi Guven, i'm using a real enviroment.

                One FX 20 from Johnson Controls and another FX 06 from Johnson Controls too.

                1 Reply Last reply Reply Quote 0
                • G
                  Guven_Ulu
                  last edited by

                  It means that I need real device to develop a application by using bacnet4j..Right?

                  In your code, could you explain where your code is running? In the controller or in computer ?

                  I need to develop an application to get alarms information from bacnet software (by the way, this bacnet software is Andover Continuum - Schneider Electric),

                  I also need to develop an application get alarms information as a string and convert it to bacnet protocol and inform bacnet software? This bacnet software actually is managing and controlling subsystems which some of these subsystem's protocol is not bacnet..One of them is Web service so only way to get alarms is to call Web services method and convert to bacnet protocol and pass this info to bacnet software..

                  could it be possible develop an application like this with bacnet4j ?

                  1 Reply Last reply Reply Quote 0
                  • V
                    Valter Henrique
                    last edited by

                    Hi Guve,
                    i believe @mlohbihler is the person more capable to answer this to you dude.

                    I'm waiting for an answer from him too, let's wait =)

                    1 Reply Last reply Reply Quote 0
                    • V
                      Valter Henrique
                      last edited by

                      @Valter Henrique said:

                      Hi everyone,

                      i need to read the values of my objects, i only can read the instance number:

                      
   private static void getObjectList(LocalDevice localDevice, String ip, int port, int deviceId, float value) throws Exception {
       InetSocketAddress addr = new InetSocketAddress(InetAddress.getByName(ip), port);
       ReadPropertyRequest read = new ReadPropertyRequest(new ObjectIdentifier(ObjectType.device, deviceId), PropertyIdentifier.objectList);
       ReadPropertyAck ack = (ReadPropertyAck) localDevice.send(addr, null, 1476, Segmentation.segmentedBoth, read);

       System.out.println("IP: " + ip);
       SequenceOf<ObjectIdentifier> oids = (SequenceOf<ObjectIdentifier>) ack.getValue();

       int i = 0;
       for (ObjectIdentifier oid : oids) {
           System.out.println("--------  " + oid.getInstanceNumber());
       }

   }

                      But how read the value of each object ?
                      For example, i would like to read '15' from my analog output object, o true or false from my digital values and go on.
                      image

                      I try to write this code:

                      
       InetSocketAddress addr = new InetSocketAddress(InetAddress.getByName(ip), port);
       ReadPropertyRequest read = new ReadPropertyRequest(new ObjectIdentifier(ObjectType.analogOutput, deviceId), PropertyIdentifier.priorityArray);
       ReadPropertyAck ack = (ReadPropertyAck) localDevice.send(addr, null, 1476, Segmentation.segmentedBoth, read);
       PriorityArray priorityArray = (PriorityArray) ack.getValue();

       float priority = priorityArray.get(16).getRealValue().floatValue();
       System.out.println("priorityArray = " + priority);

                      But is not working.

                      Could anyone help me with this please ?

                      Best regards,
                      Valter Henrique.

                      Hi, someone could help me with this please ?

                      mlohbihler , could you help me, please ?

                      Thanks in advance.

                      1 Reply Last reply Reply Quote 0
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