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Forum Update on Monday, May 27th 2025

Problems when adding serialport module in Qt project

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #6

    Hi,

    What @aha_1980 asked was whether you also installed the Qt5 SerialPort package using apt.

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

    1 Reply Last reply
    1
    • douglasD douglas

      @aha_1980 I am using Qt 5.6.1. I installed Qt creator with apt. What do you mean with "add serialport explicitely"?
      Thank you!

      KillerSmathK Offline
      KillerSmathK Offline
      KillerSmath
      wrote on last edited by KillerSmath
      #7

      @douglas
      @aha_1980 told you need to install the packages individualy.

      sudo apt-get install libqt5serialport5
      sudo apt-get install libqt5serialport5-dev
      
      douglasD 1 Reply Last reply
      3
      • KillerSmathK KillerSmath

        @douglas
        @aha_1980 told you need to install the packages individualy.

        sudo apt-get install libqt5serialport5
        sudo apt-get install libqt5serialport5-dev
        
        douglasD Offline
        douglasD Offline
        douglas
        wrote on last edited by
        #8

        @KillerSmath I installed those packages via Software Center. Perhaps have I to uninstall them and re-install via apt-get?
        Could it be the reason for the "unknown module" error?

        KillerSmathK 1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #9

          Silly question: are you sure you are using Qt 5 and not Qt 4 for your project ?

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

          douglasD 1 Reply Last reply
          0
          • SGaistS SGaist

            Silly question: are you sure you are using Qt 5 and not Qt 4 for your project ?

            douglasD Offline
            douglasD Offline
            douglas
            wrote on last edited by
            #10

            @SGaist Yes, the Help menu from Qt Creator reports:
            0_1528877526983_c9026808-fe20-4a8b-99f4-31be90b3f4e8-immagine.png
            In fact, I read that serialport module was not included in Qt4, but it seems I am using Qt5, this is the reason why I can't understand that build error..

            1 Reply Last reply
            0
            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #11

              That's just the information about Qt Creator.

              You have to check the Kit you are using to build your application and which version of Qt it is using.

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

              douglasD 1 Reply Last reply
              0
              • douglasD douglas

                @KillerSmath I installed those packages via Software Center. Perhaps have I to uninstall them and re-install via apt-get?
                Could it be the reason for the "unknown module" error?

                KillerSmathK Offline
                KillerSmathK Offline
                KillerSmath
                wrote on last edited by KillerSmath
                #12

                @douglas
                If nothing works, you can try to manage the packages from MaintenanceTool of QtCreator

                  1. <Qt Folder>/MaintenanceTool
                  1. Add or remove Components
                  1. Expand your Qt version
                  1. Expand Source Components
                  1. Select the Qt Source Package
                  1. Next, Install
                1 Reply Last reply
                0
                • SGaistS SGaist

                  That's just the information about Qt Creator.

                  You have to check the Kit you are using to build your application and which version of Qt it is using.

                  douglasD Offline
                  douglasD Offline
                  douglas
                  wrote on last edited by
                  #13

                  @SGaist how can I make sure of the Qt version I am using in my project?

                  J.HilkJ 1 Reply Last reply
                  0
                  • KillerSmathK Offline
                    KillerSmathK Offline
                    KillerSmath
                    wrote on last edited by
                    #14
                    This post is deleted!
                    1 Reply Last reply
                    0
                    • douglasD douglas

                      @SGaist how can I make sure of the Qt version I am using in my project?

                      J.HilkJ Offline
                      J.HilkJ Offline
                      J.Hilk
                      Moderators
                      wrote on last edited by
                      #15

                      @douglas
                      In QtCreator go to Tools -> Options -> build & run and check your kits

                      0_1528878528527_b34127d9-9d4c-4f4e-896b-57a4a318f333-image.png

                      In sidebar under the "Projects tab" you can select one of your installed kits:
                      0_1528878587108_07154278-cd0d-49d8-b11f-48a5441b9854-image.png


                      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.

                      douglasD 1 Reply Last reply
                      2
                      • J.HilkJ J.Hilk

                        @douglas
                        In QtCreator go to Tools -> Options -> build & run and check your kits

                        0_1528878528527_b34127d9-9d4c-4f4e-896b-57a4a318f333-image.png

                        In sidebar under the "Projects tab" you can select one of your installed kits:
                        0_1528878587108_07154278-cd0d-49d8-b11f-48a5441b9854-image.png

                        douglasD Offline
                        douglasD Offline
                        douglas
                        wrote on last edited by
                        #16

                        @J.Hilk My environment is a bit different; I can't find informations about the version..
                        0_1528879450246_5ef95ff2-c072-4d13-894d-4b7af5bb41e7-immagine.png

                        J.HilkJ 1 Reply Last reply
                        0
                        • douglasD douglas

                          @J.Hilk My environment is a bit different; I can't find informations about the version..
                          0_1528879450246_5ef95ff2-c072-4d13-894d-4b7af5bb41e7-immagine.png

                          J.HilkJ Offline
                          J.HilkJ Offline
                          J.Hilk
                          Moderators
                          wrote on last edited by
                          #17

                          @douglas
                          from what one can see, it at least seems to be a version of Qt5, for more information press the "Manage kits" button


                          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.

                          douglasD 1 Reply Last reply
                          0
                          • J.HilkJ J.Hilk

                            @douglas
                            from what one can see, it at least seems to be a version of Qt5, for more information press the "Manage kits" button

                            douglasD Offline
                            douglasD Offline
                            douglas
                            wrote on last edited by
                            #18

                            @J.Hilk The Manage Kit button shows the settings reported below, in which I can't find any information regarding the Qt version in use:
                            0_1528882243058_5fd714c7-c885-44b9-9911-43fbdc2ec394-immagine.png

                            If from terminal I write

                            $ qmake --version
                            

                            I obtain the following:

                            qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory
                            

                            Is it relevant the "qt4" shown in that prompt?
                            Thanks.

                            J.HilkJ 1 Reply Last reply
                            0
                            • douglasD douglas

                              @J.Hilk The Manage Kit button shows the settings reported below, in which I can't find any information regarding the Qt version in use:
                              0_1528882243058_5fd714c7-c885-44b9-9911-43fbdc2ec394-immagine.png

                              If from terminal I write

                              $ qmake --version
                              

                              I obtain the following:

                              qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory
                              

                              Is it relevant the "qt4" shown in that prompt?
                              Thanks.

                              J.HilkJ Offline
                              J.HilkJ Offline
                              J.Hilk
                              Moderators
                              wrote on last edited by
                              #19

                              @douglas
                              well, there we have your problem

                              0_1528882573156_25bb3434-9c9d-43e1-91e3-d1d195bd5377-image.png

                              you have no QtLibary selected to your kit. Se if you can actually select a QtVersion from that dropdown menu. If you can't than you need to install an actual qt version.

                              I would recommend the online installer from the Webside.


                              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.

                              douglasD 1 Reply Last reply
                              1
                              • J.HilkJ J.Hilk

                                @douglas
                                well, there we have your problem

                                0_1528882573156_25bb3434-9c9d-43e1-91e3-d1d195bd5377-image.png

                                you have no QtLibary selected to your kit. Se if you can actually select a QtVersion from that dropdown menu. If you can't than you need to install an actual qt version.

                                I would recommend the online installer from the Webside.

                                douglasD Offline
                                douglasD Offline
                                douglas
                                wrote on last edited by
                                #20

                                @J.Hilk Thanks, I added the version as shown below:
                                0_1528884090398_f92cd759-ed4c-403b-9ff6-6b0378c19b45-immagine.png
                                Now, since I should have Qt5, I added the serialport support in my .pro file, but the "unknow module" error still remains. I saw another thing that seems not so clear to me: I run Qt Creator from linux terminal, and when I open my project the terminal shows the following lines, marked in red, in which appears Qt4. Can this be related to the serialport module error?
                                0_1528884382827_59039698-8cd0-49c5-8a93-a8c89abf87c9-immagine.png
                                thank you again.

                                jsulmJ 1 Reply Last reply
                                0
                                • douglasD douglas

                                  @J.Hilk Thanks, I added the version as shown below:
                                  0_1528884090398_f92cd759-ed4c-403b-9ff6-6b0378c19b45-immagine.png
                                  Now, since I should have Qt5, I added the serialport support in my .pro file, but the "unknow module" error still remains. I saw another thing that seems not so clear to me: I run Qt Creator from linux terminal, and when I open my project the terminal shows the following lines, marked in red, in which appears Qt4. Can this be related to the serialport module error?
                                  0_1528884382827_59039698-8cd0-49c5-8a93-a8c89abf87c9-immagine.png
                                  thank you again.

                                  jsulmJ Offline
                                  jsulmJ Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #21

                                  @douglas Above you said you installed Qt 5.6, now you selected Qt 5.7.1
                                  Which Qt version do you really want to use and did you install QtSearialPort for Qt 5.7.1?

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

                                  douglasD 1 Reply Last reply
                                  0
                                  • jsulmJ jsulm

                                    @douglas Above you said you installed Qt 5.6, now you selected Qt 5.7.1
                                    Which Qt version do you really want to use and did you install QtSearialPort for Qt 5.7.1?

                                    douglasD Offline
                                    douglasD Offline
                                    douglas
                                    wrote on last edited by
                                    #22

                                    @jsulm when I spoke about Qt 5.6 I was referring to the "About Qt Creator" window shown above. Now I selected Qt 5.7.1 as the version for my kit. But the serialport module isn't recognized yet. What I should do to correctly install QtSerialPort for my actual version?

                                    Pablo J. RoginaP 1 Reply Last reply
                                    0
                                    • douglasD douglas

                                      @jsulm when I spoke about Qt 5.6 I was referring to the "About Qt Creator" window shown above. Now I selected Qt 5.7.1 as the version for my kit. But the serialport module isn't recognized yet. What I should do to correctly install QtSerialPort for my actual version?

                                      Pablo J. RoginaP Offline
                                      Pablo J. RoginaP Offline
                                      Pablo J. Rogina
                                      wrote on last edited by
                                      #23

                                      @douglas could it be possible that you start from scratch with a clean installation of Qt, ideally latest version 5.11? you may try in a virtual machine just in case.

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                                      1 Reply Last reply
                                      1
                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #24

                                        Is it me or are you trying to build your project for an embedded system ?
                                        I see that you are trying to use an arm compiler, did you cross-compile Qt for your device ?

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

                                        1 Reply Last reply
                                        4
                                        • douglasD Offline
                                          douglasD Offline
                                          douglas
                                          wrote on last edited by
                                          #25

                                          @SGaist Yes, my target device runs Linux Yocto. Can this affect the serialport module I am trying to install?

                                          1 Reply Last reply
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