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drjdpowell

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drjdpowell last won the day on November 19

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About drjdpowell

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    Oxford, UK

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    LabVIEW 2017
  • Since
    1999

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  1. Try just taking out the generated column. Those were added recently, in SQLite 3.31.0. If the NI Linux package for SQLite is an earlier version than that then it will throw an error at the Create Table statement. What error was given? The error should have given useful debug info.
  2. You need see past your specific motor types to think what your generic motor needs to do. Is it returning configuration info? That can be JSON, rather than a typed cluster. Or a Variant, or an object of a "config" subclass. My advice is to NOT learn OOP with a Motor Parent class unless you have enough experience with different motor types so that you can form a solid view of what a generic motor does.
  3. I'll have a read, but that looks a bit more complex than I have the time for. I will just do a simple Messenger-Library-only service discover implementation.
  4. Another possible service-discovery design is a central broker; an actor with TCP Server at a known IP/Port that all services connect to to register their location, and to which clients connect to lookup services.
  5. A beta version is now posted: https://forums.ni.com/t5/JDP-Science-Tools/UDP-Messengers/td-p/4099792 This is of the UDP comms itself; haven't done a service-discovery implementation yet.
  6. https://bitbucket.org/drjdpowell/jsontext/issues/68/report-issue-converting-a-array-of
  7. Decided to update this to 2020 and release (this is 0.3; I never posted 0.2): jdp_science_lib_malleable_buffer-0.3.0.8.vip
  8. Note: I've also been thinking about UDP Messenger functionality, and am interested in people's use cases: https://forums.ni.com/t5/JDP-Science-Tools/UDP-Messengers/m-p/4099792#M17 The use case I'm interested in is discoverability on the network. So, allowing actors on different machines to announce their existence (ip address and port) via UDP, so that a TCP Messenger connection can then be established. This could be built in to the new Reconnecting TCP Messengers.
  9. I don't think they did that. There is a couple of my lava packages on there, but I explicitly uploaded them to VIPM.io
  10. Do you use any DVRs? I believe quite a lot happens when the LabVIEW execution system changes a VI from "running top level" to "idle", including destroying any references created by that VI. Not sure what happens if a DVR that it owns is currently being accessed by another VI; I assume it must wait for the DVR to be released before finishing teh transition to "idle".
  11. Hi your SQlite library is missing "array of variants to cluster".

    Where can i find this vi?

    1. drjdpowell

      drjdpowell

      VIPM should have installed JDP Science Common Utilities when you installed SQLite.

    2. Ad Dekkers

      Ad Dekkers

      Restarted the vip manager and there is an update of the SQLite library with this vi !

       

      Problem solved 🙂

  12. Unfortunately, the NXG Web module lacks both recursion and VIs for determining the data type inside a variant. This makes porting JSONtext to it very difficult.
  13. Working on Idea (1) https://bitbucket.org/drjdpowell/sqlite-labview/issues/12/add-an-execute-sql-statement-multiple
  14. That's sloppy on my part. Arrays should not be supported at all and that should throw an "Unable to Bind Arrays" error. The code for that is in the Disabled case of "Parse Parameters (Code).vi". I was experimenting with the idea of allowing U8 Arrays as binding as BLOBs, and I seem to have not undone my buggy experimental modification.
  15. That example isn't broken for me in LabVIEW 2020. What happens if you delete the broken wire and reconnect?
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