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    SeroUtils.jar management

    Modbus4J general discussion
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    • A
      apl
      last edited by

      My problem is, in which way do you want to get your bread and butter from this?

      I haven't seen a price tag so far. Do you want to get your revenue with commercial support, ...?

      So not to open source serutils.jar may have for some potential commercial customers the smell of a trap.
      A solution would be decompile serutils (there is no expicit license, so it is LGPL too?, but the sources are missing ;-).
      In this case decompilation should be no problem for you.

      If you plan to extensively cash money for mango, a fork of mango and bugfixing without Serotonin Inc. would be possible - this may be a solution for potential customers.

      Don't get me wrong: You need money too, but before I use this software commercially I have to be confident there is no hidden trap in the future. So a pricelist and/or a license for serutils.jar would be fine ;-)

      Arne

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      • A
        andrex
        last edited by

        The Java api are open.

        search in JAVA_HOME/src.zip

        Only the com.sun api are not open.

        If you make a program that use com.sun api you can't say it is "open" and sun alert you against this warning.

        If you write good open source code,
        as you have effectively done,
        but you link it aginst not open source code,
        without java interfaces which permit the use of the open code without the closed library,
        you destroy the advantage of the open code you wrote.

        For example I have the problem in using your code because I'm not sure I will cacth the bugs in my products if I will use your GOOD library.

        maybe, if you release the seroUtils opensource, we can help you to fix bugs or make it more documented or less sperimental.

        On the other side, if you prefer mantain the seroUtils closed, you may code the modbus4J less bound to the utils, via some padckage-interface.

        Regards
        Andrea

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        • F
          Fred
          last edited by

          Removed post.

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          • R
            racj
            last edited by

            Dear Matthew,

            I am currently using JAMOD on a CDC platform and would be interested in using Modbus4J, since this gives RTU slave capability.

            However, The seroUtils.jar is not JAVA 1.4 compatible, which is what I need for my CDC platform (which consequently fails when trying to link).

            Are you able to provide a version of the JAR file built using the JAVA compiler switches -source 1.4 and -target 1.4 ?

            If you are able to do this then I would look to generate a CDC compatible version of Modbus4J.

            Many thanks

            Richard

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            • M
              mlohbihler
              last edited by

              Hi Richard,

              It is very likely possible to create a CDC-compatible version of seroUtils. Is this a personal project, or do you have a development budget?

              Best regards,
              Matthew

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              • R
                racj
                last edited by

                Dear Matthew,

                This is a research project - so only a very limited budget.

                How long do you think it would take you ?

                Would it be possible for me to look at what is needed for a CDC compatible compile ? I do realise from the previous discussions in this thread that you have concerns about open sourcing SeroUtils - can this be handled some other way than global open source ?

                Regards

                Richard

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                • M
                  mlohbihler
                  last edited by

                  Hi Richard,

                  Did you already convert Modbus4J to 1.4? I recall that for the "-source 1.4" switch to work you'd need to refactor all the generics, annotations, and auto-boxing, and possibly other stuff too.

                  Best regards,
                  Matthew

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                  • R
                    racj
                    last edited by

                    Dear Matthew,

                    I have only identified the sections that will need to be modified (as you correctly identified this is mostly generics etc), However I have not proceeded with implementing any changes, because having a usable system is dependant on having a CDC compatible version of SeroUtils.

                    Do you have a feel for how much work it would be to generate the CDC compatible version of SeroUtils ?

                    Regards

                    Richard

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                    • M
                      mlohbihler
                      last edited by

                      I could provide you with the subset of seroUtils required by Modbus4J fairly easily. Do note though that Modbus4J is GPL software. Any changes you make need to become open source, which is a consideration if your project ever becomes commercial in the future. But Serotonin can provide a more LGPL-like license in this occurrence.

                      Best regards,
                      Matthew

                      1 Reply Last reply Reply Quote 0
                      • R
                        racj
                        last edited by

                        Dear Matthew,

                        Open source is not a problem.

                        Would you provide the sub-set of SeroUtils as source for me to do the conversion or would you look to do it yourself ?

                        Regards

                        Richard

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                        • M
                          mlohbihler
                          last edited by

                          If you're converting the Modbus4J stuff, you might as well do this too. Attached.

                          Attachment: download link

                          Best regards,
                          Matthew

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                          • R
                            racj
                            last edited by

                            Dear Matthew,

                            Thank you for that. I will let you know how I get on.

                            Regards

                            Richard

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                            • G
                              gpulido
                              last edited by

                              Dear Matthew,
                              I'm collaborating in a Open Source project to develop a personal home-automation framework, and we would like to use your Modbus4J library.
                              Unfortunatelly it depends of the seroUtils.jar and as our project is under the GPL license we would like to know if you can proportionate us the source code for the library.
                              Thank you in advance
                              Best regards
                              Gabriel

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                              • M
                                mlohbihler
                                last edited by

                                Hi Gabriel,

                                The source in the above should be all you need. Feel free to use it.

                                Regards,
                                Matthew

                                Best regards,
                                Matthew

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                                • G
                                  gpulido
                                  last edited by

                                  Hello Mathew,

                                  Unfortunately the link is broken can you publish it again?
                                  Thank you
                                  Regards,
                                  Gabriel

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                                  • M
                                    mlohbihler
                                    last edited by

                                    Ah, right. Lost in the move. Re-attached.

                                    Attachment: download link

                                    Best regards,
                                    Matthew

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                                    • A
                                      apl
                                      last edited by

                                      @mlohbihler said:

                                      Modbus4J is open source, as all of the sources for Modbus4J are provided. As i said, seroUtils.jar is not open source, not for any matter of secrecy, but only because there are parts of it that users will most certainly ask about that we are not prepared to support. It is, of course, Java technology, and as such resourceful users will - i'm certain - find ways to debug their code without Serotonin having to take on supporting yet another open source project. Again, if this does not suit your sense of entitlement, you have alternatives.

                                      Can I take this, that I can reengineer the needed sorces for mango M2M (1.12.4) for further development?
                                      Or under which license is seroUtils.jar?

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                                      • M
                                        mlohbihler
                                        last edited by

                                        Yes, you can do what you like with the sources within the constraints of the GPL license. The license for seroUtils is not defined, but it is intended to be used only as support for Mango. I would be inclined to grant its use as support for Mango derivatives under GPL as well.

                                        Best regards,
                                        Matthew

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                                        • A
                                          apl
                                          last edited by

                                          So, can I

                                          get the needed sources

                                          or
                                          decompile the needed classes it for ScadaBR?

                                          and

                                          put them in a different packages?

                                          OR have a double license GPL and closed source licenses for serotonin only? (this can include any code commited to the GPL version is also in the closed source as well)?

                                          Arne

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                                          • M
                                            mlohbihler
                                            last edited by

                                            For seroUtils? No. The license would be one of usage with Mango.

                                            Best regards,
                                            Matthew

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