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  4. Unable to read from QSerialPort using MSVC compiler

Unable to read from QSerialPort using MSVC compiler

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  • J jsulm
    24 Nov 2021, 14:11

    @Turi said in Unable to read from QSerialPort using MSVC compiler:

    I have already followed the suggestions of @J-Hilk

    No, I was refering to this:
    "also connect to the error signal errorOccured
    https://doc.qt.io/qt-5/qserialport.html#errorOccurred"

    And you should use the Qt5 connect syntax: https://doc.qt.io/qt-5/signalsandslots.html

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    Turi
    wrote on 24 Nov 2021, 14:26 last edited by
    #11

    @jsulm
    I have already tried all this and all seem work fine, without any error. But my application still does not read from the serial only if I use the MSVC compiler.

    J J 2 Replies Last reply 24 Nov 2021, 14:28
    0
    • T Turi
      24 Nov 2021, 14:26

      @jsulm
      I have already tried all this and all seem work fine, without any error. But my application still does not read from the serial only if I use the MSVC compiler.

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      J Offline
      jsulm
      Lifetime Qt Champion
      wrote on 24 Nov 2021, 14:28 last edited by
      #12

      @Turi Did you verify that the other side sends something?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      T 1 Reply Last reply 24 Nov 2021, 14:36
      0
      • T Turi
        24 Nov 2021, 14:26

        @jsulm
        I have already tried all this and all seem work fine, without any error. But my application still does not read from the serial only if I use the MSVC compiler.

        J Offline
        J Offline
        J.Hilk
        Moderators
        wrote on 24 Nov 2021, 14:30 last edited by
        #13

        @Turi what versions are we actually talking here ?

        Qt(from the kit), msvc, windows etc.

        and can you show more of your actually class that does the serial communication?


        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


        Q: What's that?
        A: It's blue light.
        Q: What does it do?
        A: It turns blue.

        T 1 Reply Last reply 24 Nov 2021, 14:46
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        • J jsulm
          24 Nov 2021, 14:28

          @Turi Did you verify that the other side sends something?

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          Turi
          wrote on 24 Nov 2021, 14:36 last edited by
          #14

          @jsulm
          Yes, the other side reveives and sends messages.

          1 Reply Last reply
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          • J J.Hilk
            24 Nov 2021, 14:30

            @Turi what versions are we actually talking here ?

            Qt(from the kit), msvc, windows etc.

            and can you show more of your actually class that does the serial communication?

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            Turi
            wrote on 24 Nov 2021, 14:46 last edited by
            #15

            @J-Hilk
            I'm using:

            • Qt Creator 4.9.0
            • Based on Qt 5.12.2 (MSVC 2017, 32 bit)
            • Windows 10 Enterprise

            Unfortunately I can't show more of my actually class due to the fact that is reserved code.

            J 1 Reply Last reply 24 Nov 2021, 14:48
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            • T Turi
              24 Nov 2021, 14:46

              @J-Hilk
              I'm using:

              • Qt Creator 4.9.0
              • Based on Qt 5.12.2 (MSVC 2017, 32 bit)
              • Windows 10 Enterprise

              Unfortunately I can't show more of my actually class due to the fact that is reserved code.

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              J Offline
              jsulm
              Lifetime Qt Champion
              wrote on 24 Nov 2021, 14:48 last edited by
              #16

              @Turi said in Unable to read from QSerialPort using MSVC compiler:

              Based on Qt 5.12.2 (MSVC 2017, 32 bit)

              This is the Qt version which was used to build QtCreator.
              What Qt version do you use?

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              1 Reply Last reply
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              • T Offline
                T Offline
                Turi
                wrote on 24 Nov 2021, 14:57 last edited by
                #17

                Qt 5.12.3
                MinGW 7.3.0 32-bit
                MSVC 2017 32-bit

                J 1 Reply Last reply 24 Nov 2021, 14:59
                0
                • T Turi
                  24 Nov 2021, 14:57

                  Qt 5.12.3
                  MinGW 7.3.0 32-bit
                  MSVC 2017 32-bit

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                  jsulm
                  Lifetime Qt Champion
                  wrote on 24 Nov 2021, 14:59 last edited by
                  #18

                  @Turi Can you try with 5.15.2?

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  T 1 Reply Last reply 24 Nov 2021, 15:10
                  0
                  • J jsulm
                    24 Nov 2021, 14:59

                    @Turi Can you try with 5.15.2?

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                    Turi
                    wrote on 24 Nov 2021, 15:10 last edited by
                    #19

                    @jsulm
                    Can you pass me a link where I can download this version?

                    J 1 Reply Last reply 24 Nov 2021, 15:56
                    0
                    • T Offline
                      T Offline
                      Turi
                      wrote on 24 Nov 2021, 15:53 last edited by
                      #20

                      I tried with Qt 5.12.2 but not work.

                      J 1 Reply Last reply 24 Nov 2021, 15:56
                      0
                      • T Turi
                        24 Nov 2021, 15:10

                        @jsulm
                        Can you pass me a link where I can download this version?

                        J Offline
                        J Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on 24 Nov 2021, 15:56 last edited by
                        #21

                        @Turi said in Unable to read from QSerialPort using MSVC compiler:

                        Can you pass me a link where I can download this version?

                        Use the Qt Maintenance Tool to add that Qt version to your installation.

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        1 Reply Last reply
                        0
                        • T Turi
                          24 Nov 2021, 15:53

                          I tried with Qt 5.12.2 but not work.

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                          J Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on 24 Nov 2021, 15:56 last edited by
                          #22

                          @Turi said in Unable to read from QSerialPort using MSVC compiler:

                          I tried with Qt 5.12.2 but not work.

                          I seggested 5.15.2, not 5.12.2

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          T 1 Reply Last reply 24 Nov 2021, 16:38
                          0
                          • J jsulm
                            24 Nov 2021, 15:56

                            @Turi said in Unable to read from QSerialPort using MSVC compiler:

                            I tried with Qt 5.12.2 but not work.

                            I seggested 5.15.2, not 5.12.2

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                            Turi
                            wrote on 24 Nov 2021, 16:38 last edited by
                            #23

                            @jsulm Sorry, my bad. With Qt 5.15.2 my application works fine. Thank you.
                            So, is this a bug of older versions?

                            1 Reply Last reply
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                              SGaist
                              Lifetime Qt Champion
                              wrote on 24 Nov 2021, 19:18 last edited by
                              #24

                              There was a bug with QSerialPort on Windows but IIRC it has been also fixed for the 5.12 series if you really need it. But you have to update to the latest release of that series.

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                Christian Ehrlicher
                                Lifetime Qt Champion
                                wrote on 25 Nov 2021, 06:09 last edited by
                                #25

                                Here the bug report for this issue: https://bugreports.qt.io/browse/QTBUG-78086

                                Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
                                Visit the Qt Academy at https://academy.qt.io/catalog

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