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    Segmented Answer -> Timeout while waiting for APDU id

    BACnet4J general discussion
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    • T
      TWeiss
      last edited by

      Hello,

      i am struggling with sending segmented answers:

      I implemented a "virtual" local device with some objects and testing it with various test-clients like "BrightCore BACnet Lookout" or "WAGO BACnet Configurator".

      Everything is fine until I have around 300 BacNetObjects so that the answer to this request ```
      Confirmed-REQ readProperty[ 1] device,1234 object-list

      has to be segmented. BACnet4J sends back the first segment ```
      Complex-ACK     readProperty[  1]  (Message fragment 0)
      ``` and wait for an ACK, which
      is visible in wireshark (```
      Segment-ACK
      ```), but not recognized by BACnet4J.
      
      After 3 retries i got a timeout  :cry: 
      
      i am debugging in eclipse alot, but i cant figure out why the Segment-ACK-Answer from my client is ignored.
      
      Any suggestions?
      
      Thank you!
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