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    The test tool could not find the device instantiated by Java

    BACnet4J general discussion
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    • M
      mmmoczj
      last edited by

      Hello, I have encountered a problem here that has not been solved for a long time. I instantiated a device through the following code, but I could not find this device through the test tool. I hope you can help me, thank you

      public class Device {
          LocalDevice localDevice;
      
          public void init() throws Exception {
              IpNetwork network = new IpNetworkBuilder()
                      .withBroadcast("192.168.33.255", 24)
                      .withLocalBindAddress("192.168.33.101")
                      .withPort(47999)
                      .build();
              Transport transport = new DefaultTransport(network);
              localDevice = new LocalDevice(1996, transport);
              localDevice.initialize();
          }
      
          public static void main(String[] args) throws Exception {
              new Device().init();
          }
      }
      
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      • phildunlapP
        phildunlap
        last edited by

        Hi mmmoczj,

        Surely there is more to your test? This seems to me like the process would exit before any responses would have had a chance to respond.

        Assuming the issue isn't your program exiting after the all to initialize the LocalDevice (which send a WhoIS but does not pause the thread that called it to listen for some amount of time for responses, that's handled by another thread elsewhere), then I would guess you may want to try other possible addresses, such as a broadcast of 255.255.255.255 with a bind address of 0.0.0.0

        Also if you call initialize without having a device object added to the local device, it will do some scanning and try to assign itself a number. You can see what the initialize method does here, although what is shown on the main branch may or may not be what you are working with: https://github.com/infiniteautomation/BACnet4J/blob/master/src/main/java/com/serotonin/bacnet4j/LocalDevice.java#L312

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