Thank you very much

Purely as a BACnet4J question, I would suspect you could add the remote device to the LocalDevice's remoteDeviceCache manually, though this means you are working around a failure to comply with the BACnet spec in doing so, so there may be other problems down the road to solve.

Please set the protocol services supported property of device object accordingly. This property is string of bits, setting 1 in any position indicates that the service in the corresponding position is supported.

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

@terrypacker Thank you for your help, but I want to get RemoteDevice through IP. There is no such function in those files.I wanted to get the device that way, but this is the old version,

RemoteDevice d = localDevice.findRemoteDevice( new Address(0, IpNetworkUtils.toOctetString("192.168.33.53:8099")), 10086);