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Problem on Barcode Scanner using serial port

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  • SURYA PS Offline
    SURYA PS Offline
    SURYA P
    wrote on last edited by
    #7

    https://i.postimg.cc/HsRpbjdY/Screenshot-57.png
    if i click the scan button that command should work . and give output like that

    1 Reply Last reply
    0
    • jsulmJ jsulm

      @SURYA-P Where in that code do you send anything over serial port?
      What did you try so far?
      Was on_pushButton_clicked() called?
      Was BSerial->open(QIODevice::ReadWrite) successful?
      Was inputFile.open(QIODevice::ReadOnly) successful?

      SURYA PS Offline
      SURYA PS Offline
      SURYA P
      wrote on last edited by
      #8

      @jsulm pushButtton mean open Button

      jsulmJ 1 Reply Last reply
      0
      • SURYA PS SURYA P

        @jsulm pushButtton mean open Button

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #9

        @SURYA-P Please show me the code where you send data over serial port...

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

        SURYA PS 1 Reply Last reply
        1
        • jsulmJ jsulm

          @SURYA-P Please show me the code where you send data over serial port...

          SURYA PS Offline
          SURYA PS Offline
          SURYA P
          wrote on last edited by
          #10

          @jsulm BSerial = new QSerialPort(this);
          BSerial->setPortName(ui->comboBox->currentText());
          BSerial->setBaudRate(QSerialPort::Baud9600);
          BSerial->setDataBits(QSerialPort::Data8);
          BSerial->setParity(QSerialPort::NoParity);
          BSerial->setStopBits(QSerialPort::OneStop);
          BSerial->setFlowControl(QSerialPort::NoFlowControl);
          if(BSerial->open(QIODevice::ReadWrite)){
          qDebug() << "port open ok";
          connect(BSerial, &QSerialPort::readyRead, this, &MainWindow::on_pushButton_2_clicked);

          }
          

          //this is the command for connect the serial port

          jsulmJ 1 Reply Last reply
          0
          • SURYA PS SURYA P

            @jsulm BSerial = new QSerialPort(this);
            BSerial->setPortName(ui->comboBox->currentText());
            BSerial->setBaudRate(QSerialPort::Baud9600);
            BSerial->setDataBits(QSerialPort::Data8);
            BSerial->setParity(QSerialPort::NoParity);
            BSerial->setStopBits(QSerialPort::OneStop);
            BSerial->setFlowControl(QSerialPort::NoFlowControl);
            if(BSerial->open(QIODevice::ReadWrite)){
            qDebug() << "port open ok";
            connect(BSerial, &QSerialPort::readyRead, this, &MainWindow::on_pushButton_2_clicked);

            }
            

            //this is the command for connect the serial port

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #11

            @SURYA-P Please show me the code where you send data over serial port...

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

            SURYA PS 1 Reply Last reply
            1
            • jsulmJ jsulm

              @SURYA-P Please show me the code where you send data over serial port...

              SURYA PS Offline
              SURYA PS Offline
              SURYA P
              wrote on last edited by
              #12

              @jsulm void MainWindow::SerialReceived()
              {

              serialData+=BSerial->readAll();
              receivedData = QString::fromStdString(serialData.toStdString());
              ui->textEdit_2->setText(serialData);
              

              }

              this is for read data

              jsulmJ 1 Reply Last reply
              0
              • SURYA PS SURYA P

                @jsulm void MainWindow::SerialReceived()
                {

                serialData+=BSerial->readAll();
                receivedData = QString::fromStdString(serialData.toStdString());
                ui->textEdit_2->setText(serialData);
                

                }

                this is for read data

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #13

                @SURYA-P said in Problem on Barcode Scanner using serial port:

                this is for read data

                I asked about writing data...

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

                SURYA PS 1 Reply Last reply
                0
                • jsulmJ jsulm

                  @SURYA-P said in Problem on Barcode Scanner using serial port:

                  this is for read data

                  I asked about writing data...

                  SURYA PS Offline
                  SURYA PS Offline
                  SURYA P
                  wrote on last edited by
                  #14

                  @jsulm i wrote a command on file(0x7E 0x00 0x08 0x01 0x00 0x02 0x01 0xAB 0xCD) this is the command ..

                  mrjjM 1 Reply Last reply
                  0
                  • SURYA PS SURYA P

                    @jsulm i wrote a command on file(0x7E 0x00 0x08 0x01 0x00 0x02 0x01 0xAB 0xCD) this is the command ..

                    mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #15

                    @SURYA-P

                    Hi
                    but to send it to device we are after code that is like
                    BSerial->write ( xxx );

                    1 Reply Last reply
                    1
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #16

                      Hi,

                      Beside what my fellows already asked:
                      @SURYA-P said in Problem on Barcode Scanner using serial port:

                      connect(BSerial, &QSerialPort::readyRead, this, &MainWindow::on_pushButton_2_clicked);

                      Are you sure it's the right slot your are connecting ?

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

                      SURYA PS 1 Reply Last reply
                      1
                      • SGaistS SGaist

                        Hi,

                        Beside what my fellows already asked:
                        @SURYA-P said in Problem on Barcode Scanner using serial port:

                        connect(BSerial, &QSerialPort::readyRead, this, &MainWindow::on_pushButton_2_clicked);

                        Are you sure it's the right slot your are connecting ?

                        SURYA PS Offline
                        SURYA PS Offline
                        SURYA P
                        wrote on last edited by
                        #17

                        @SGaist sorry this is correct slot
                        connect(BSerial, &QSerialPort::readyRead, this, &MainWindow::SerialReceived);

                        but i am not getting output

                        1 Reply Last reply
                        0
                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #18

                          As my fellows already requested, please show the part where you actually write to the serial port.

                          On a side note, if you call on_pushButton_clicked several times, you are going to leak objects and not properly release them.

                          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
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