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convert string to hex

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  • M Offline
    M Offline
    Mark81
    wrote on last edited by
    #2

    Your code just assigns to a variable the content of your QLineEdit. It's not clear what do you mean with "convert to hex". Hex it just a presentation format, not the number itself. If you have an hex string (like "ffaabbccdd") you can convert it to a number:

    QString a = "ffaabbccdd";
    qDebug() << a.toLongLong(nullptr, 16);
    // output: 1098081094877
    

    and of course it won't work with "veyselolgun" because it's not a valid hex string.

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    • V Offline
      V Offline
      veysel.olgun
      wrote on last edited by
      #3

      @Mark81 said in convert string to hex:

      a.toLongLong(nullptr, 16);

      i want to send to card reader when i entry to Qlineedit veyselolgun data, and i want to receive this data veyselolgun from card reader

      for example when i entry to Qlineedit aabbccddeeff data, it sending to card reader and i am receiving response that is aabbccddeeff from card reader

      i hope i express what i want to do
      thank you

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #4

        Hi,

        What exactly is your card reader expecting ?

        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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        • V Offline
          V Offline
          veysel.olgun
          wrote on last edited by veysel.olgun
          #5

          Example: write to block 40: “00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F” //this is what i send but i want to send for example "hello world" or "data was written"

          Successful operation:

          REQUEST : HOST->READER: 02 1B 00 3E DF 78 12 A6 28 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 1C 03

          ACKOWLEDGE : READER->HOST: 02 08 00 3E 00 00 34 03
          RESPONSE : READER->HOST: 02 0D 00 3E FF 01 04 DF 78 01 A6 CB 03

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          • V Offline
            V Offline
            veysel.olgun
            wrote on last edited by
            #6

            when i want to read block of 40 i have to show that :

            Example: read block 40 (0x28)

            Successful read of “00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F”:

            REQUEST : HOST->READER: 02 0B 00 3E DF 78 02 A5 28 1F 03

            ACK : READER->HOST: 02 08 00 3E 00 00 34 03

            RESPONSE : READER->HOST: 02 1D 00 3E FF 01 14 DF 78 11 A5 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F D8 03 //if i write hello worldworld i have to read that :

            02 1D 00 3E FF 01 14 DF 78 11 A5 hello worldworld D8 03 of course D8 03 will be changed

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #7

              Can you provide a link to the protocol you should use with that reader ?

              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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              • V Offline
                V Offline
                veysel.olgun
                wrote on last edited by
                #8
                This post is deleted!
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                • V Offline
                  V Offline
                  veysel.olgun
                  wrote on last edited by
                  #9

                  can you send me your email adress from private message because there is no it on website, i have a pdf sorry i am late to reply because i have no reputation

                  jsulmJ 1 Reply Last reply
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                  • V veysel.olgun

                    can you send me your email adress from private message because there is no it on website, i have a pdf sorry i am late to reply because i have no reputation

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    @veysel.olgun Don't ask others for their email address!
                    You can upload the document to some sharing service (drop box for example) and post the link here.

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

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                    • V Offline
                      V Offline
                      veysel.olgun
                      wrote on last edited by
                      #11

                      sorry for that, i will load dropbox

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                      • V Offline
                        V Offline
                        veysel.olgun
                        wrote on last edited by
                        #12

                        https://www.dropbox.com/s/xb5uus6j8cu8juf/HOST-READER PROTOCOL v1.8. 15.03.2016 .pdf?dl=0

                        page number 14-17

                        thank you

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                        • V Offline
                          V Offline
                          veysel.olgun
                          wrote on last edited by
                          #13

                          hello i solved the problem thank you all

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #14

                            What was it ?

                            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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                            • V Offline
                              V Offline
                              veysel.olgun
                              wrote on last edited by veysel.olgun
                              #15

                              it is about send to text data selected block and after take the text data selected block, actually if i show it it will be more understandable. i know it is easy to do but i was forced while converting.

                              (https://ddgobkiprc33d.cloudfront.net/2ff2c1a2-d1bd-4501-8519-8b81632ac359.png) i know ui is not good for now

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