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Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.

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  • R Rika

    @jsulm Sorry, I don't really understand what you mean. Can you give an example with code?

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #15

    @Rika

    void serial::on_readdata()
    {
        ba.apend(serialPort->readAll());
        qDebug()<<ba.size()<<"sizeeeee:";
        if (ba.size() == imageSize) {
            QFile newDoc("/home/pi/Desktop/imagexx.jpg");
            if(newDoc.open(QIODevice::WriteOnly)){
                newDoc.write(ba);
            }
            newDoc.close();
        }
    }
    

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

    R 1 Reply Last reply
    2
    • jsulmJ jsulm

      @Rika

      void serial::on_readdata()
      {
          ba.apend(serialPort->readAll());
          qDebug()<<ba.size()<<"sizeeeee:";
          if (ba.size() == imageSize) {
              QFile newDoc("/home/pi/Desktop/imagexx.jpg");
              if(newDoc.open(QIODevice::WriteOnly)){
                  newDoc.write(ba);
              }
              newDoc.close();
          }
      }
      
      R Offline
      R Offline
      Rika
      wrote on last edited by
      #16

      @jsulm I tried it and it failed, I sent 31021 bytes and always received 241 bytes.

      mrjjM 1 Reply Last reply
      0
      • R Rika

        @jsulm I tried it and it failed, I sent 31021 bytes and always received 241 bytes.

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by
        #17

        @Rika
        So it only shows
        qDebug()<<ba.size()<<"sizeeeee:";
        1 time with size 241 ?

        R 1 Reply Last reply
        0
        • mrjjM mrjj

          @Rika
          So it only shows
          qDebug()<<ba.size()<<"sizeeeee:";
          1 time with size 241 ?

          R Offline
          R Offline
          Rika
          wrote on last edited by Rika
          #18

          @mrjj No, the last time was 241. My old way it also received only 241 bytes, so I was thinking of the possibility of an error sent by the program.

          mrjjM 1 Reply Last reply
          0
          • R Rika

            @mrjj No, the last time was 241. My old way it also received only 241 bytes, so I was thinking of the possibility of an error sent by the program.

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #19

            @Rika said in Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.:

            No, the last time was 241.

            So you do get mutiple
            qDebug()<<ba.size()<<"sizeeeee:";
            messages ?

            R 1 Reply Last reply
            0
            • mrjjM mrjj

              @Rika said in Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.:

              No, the last time was 241.

              So you do get mutiple
              qDebug()<<ba.size()<<"sizeeeee:";
              messages ?

              R Offline
              R Offline
              Rika
              wrote on last edited by
              #20

              @mrjj
              144 sizeeeee:
              160 sizeeeee:
              176 sizeeeee:
              192 sizeeeee:
              208 sizeeeee:
              224 sizeeeee:
              240 sizeeeee:
              241 sizeeeee:

              jsulmJ mrjjM 2 Replies Last reply
              0
              • R Rika

                @mrjj
                144 sizeeeee:
                160 sizeeeee:
                176 sizeeeee:
                192 sizeeeee:
                208 sizeeeee:
                224 sizeeeee:
                240 sizeeeee:
                241 sizeeeee:

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

                @Rika As I already said: you have to accumulate all these data in ba and when you got everything then you store it in the file.
                Again the code:

                void serial::on_readdata()
                {
                    ba.apend(serialPort->readAll());
                    qDebug()<<ba.size()<<"sizeeeee:";
                    if (ba.size() == imageSize) {
                        QFile newDoc("/home/pi/Desktop/imagexx.jpg");
                        if(newDoc.open(QIODevice::WriteOnly)){
                            newDoc.write(ba);
                        }
                        newDoc.close();
                    }
                }
                

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

                R 1 Reply Last reply
                0
                • R Rika

                  @mrjj
                  144 sizeeeee:
                  160 sizeeeee:
                  176 sizeeeee:
                  192 sizeeeee:
                  208 sizeeeee:
                  224 sizeeeee:
                  240 sizeeeee:
                  241 sizeeeee:

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by mrjj
                  #22

                  @Rika
                  But it stops at 241 every time?

                  Maybe its due to data.
                  Could you try in your sent function

                  void serial::on_pushButton_2_clicked()
                  {
                  
                  
                          QByteArray ba;
                          ba.fill('A', 1000);
                          if(serialPort->isOpen()==true){
                              serialPort->write(ba);
                              qDebug()<<ba.size()<<"size_send:";
                          }
                  }
                  

                  and see if that changes how you the reading goes.
                  This just sends 1000 A.

                  Also i wonder if write will copy the data and then send / if write sent it all there as else we have the issue of the sent buffer running out of scope.

                  R 1 Reply Last reply
                  0
                  • jsulmJ jsulm

                    @Rika As I already said: you have to accumulate all these data in ba and when you got everything then you store it in the file.
                    Again the code:

                    void serial::on_readdata()
                    {
                        ba.apend(serialPort->readAll());
                        qDebug()<<ba.size()<<"sizeeeee:";
                        if (ba.size() == imageSize) {
                            QFile newDoc("/home/pi/Desktop/imagexx.jpg");
                            if(newDoc.open(QIODevice::WriteOnly)){
                                newDoc.write(ba);
                            }
                            newDoc.close();
                        }
                    }
                    
                    R Offline
                    R Offline
                    Rika
                    wrote on last edited by
                    #23

                    @jsulm I have made your way, the above is the result from qDebug (). It only received 241 bytes so file imagexxx.jpg was not created. (my imageSize= 31021).

                    J.HilkJ 1 Reply Last reply
                    0
                    • R Rika

                      @jsulm I have made your way, the above is the result from qDebug (). It only received 241 bytes so file imagexxx.jpg was not created. (my imageSize= 31021).

                      J.HilkJ Offline
                      J.HilkJ Offline
                      J.Hilk
                      Moderators
                      wrote on last edited by
                      #24

                      @Rika said in Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.:

                      @jsulm I have made your way, the above is the result from qDebug (). It only received 241 bytes so file imagexxx.jpg was not created. (my imageSize= 31021).

                      at this point, you're not getting away with a simple I've tried that, it does not work.

                      @jsulm is absolutely correct. Show us your actual code


                      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.

                      mrjjM R 2 Replies Last reply
                      1
                      • mrjjM mrjj

                        @Rika
                        But it stops at 241 every time?

                        Maybe its due to data.
                        Could you try in your sent function

                        void serial::on_pushButton_2_clicked()
                        {
                        
                        
                                QByteArray ba;
                                ba.fill('A', 1000);
                                if(serialPort->isOpen()==true){
                                    serialPort->write(ba);
                                    qDebug()<<ba.size()<<"size_send:";
                                }
                        }
                        

                        and see if that changes how you the reading goes.
                        This just sends 1000 A.

                        Also i wonder if write will copy the data and then send / if write sent it all there as else we have the issue of the sent buffer running out of scope.

                        R Offline
                        R Offline
                        Rika
                        wrote on last edited by
                        #25

                        @mrjj I tried with 1000 A, received only 190

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

                          @Rika said in Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.:

                          @jsulm I have made your way, the above is the result from qDebug (). It only received 241 bytes so file imagexxx.jpg was not created. (my imageSize= 31021).

                          at this point, you're not getting away with a simple I've tried that, it does not work.

                          @jsulm is absolutely correct. Show us your actual code

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #26

                          @J-Hilk
                          Do you know if write blocks ?
                          QByteArray ba; // local
                          ba.fill('A', 1000);
                          if(serialPort->isOpen()==true){
                          serialPort->write(ba); // blocks here ? as ba is by reference

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

                            @Rika said in Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.:

                            @jsulm I have made your way, the above is the result from qDebug (). It only received 241 bytes so file imagexxx.jpg was not created. (my imageSize= 31021).

                            at this point, you're not getting away with a simple I've tried that, it does not work.

                            @jsulm is absolutely correct. Show us your actual code

                            R Offline
                            R Offline
                            Rika
                            wrote on last edited by
                            #27

                            @J-Hilk

                            Send:

                            #include "ui_serial.h"
                            #include <QDebug>
                            #include <QBuffer>
                            #include <QPixmap>
                            #include <QFile>
                            
                            
                            serial::serial(QWidget *parent) :
                                QMainWindow(parent),
                                ui(new Ui::serial)
                            {
                                ui->setupUi(this);
                            
                                serialPort = new QSerialPort(this);
                                serialPort->setPortName("ttyAMA0");
                                serialPort->setBaudRate(QSerialPort::Baud115200);
                                serialPort->setDataBits(QSerialPort::Data8);
                                serialPort->setStopBits(QSerialPort::OneStop);
                                serialPort->setFlowControl(QSerialPort::NoFlowControl);
                                serialPort->open(QIODevice::ReadWrite);
                            
                                if (serialPort->isOpen() == true){
                                    qDebug() <<"Port Opened....";
                                    connect(serialPort, SIGNAL(readyRead()), this, SLOT(on_readdata()));
                                }
                            }
                            void serial::on_pushButton_2_clicked()
                            {
                                QFile* imageFile = new QFile("/home/pi/Desktop/image.jpg");
                                    imageFile->open(QIODevice::ReadOnly);
                                    QByteArray ba = imageFile->readAll();
                                    imageFile->close();
                                    delete imageFile;
                                    if(serialPort->isOpen()==true){
                                        serialPort->write(ba);
                                        qDebug()<<ba.size()<<"size_send:";
                                    }
                            }
                            

                            Rec:

                            #include "serial.h"
                            #include "ui_serial.h"
                            #include <QtSerialPort/QSerialPort>
                            #include <QDebug>
                            #include <QBuffer>
                            #include <QPixmap>
                            #include <QFile>
                            #include <QMessageBox>
                            
                            serial::serial(QWidget *parent) :
                               QMainWindow(parent),
                               ui(new Ui::serial)
                            {
                               ui->setupUi(this);
                            
                               serialPort = new QSerialPort(this);
                               serialPort->setPortName("ttyAMA0");
                               serialPort->setBaudRate(QSerialPort::Baud115200);
                               serialPort->setDataBits(QSerialPort::Data8);
                               serialPort->setStopBits(QSerialPort::OneStop);
                               serialPort->setFlowControl(QSerialPort::NoFlowControl);
                               serialPort->open(QIODevice::ReadWrite);
                            
                               if (serialPort->isOpen() == true){
                                   qDebug() <<"Port Opened....";
                                   connect(serialPort, SIGNAL(readyRead()), this, SLOT(on_readdata()));
                               }
                            
                            }
                            
                            serial::~serial()
                            {
                               delete ui;
                               serialPort->close();
                            }
                            
                            
                            void serial::on_readdata()
                            {
                               ba.append( serialPort->readAll());
                               qDebug()<<ba.size()<<"sizeeeee:";
                               if (ba.size() == 31021) {
                                   QFile newDoc("/home/pi/Desktop/imagexx.jpg");
                                       if(newDoc.open(QIODevice::WriteOnly)){
                                           newDoc.write(ba);
                                       }
                                       newDoc.close();
                               }
                            //    ui->label->setText(ba);
                            
                            //      QPixmap b;
                            //      if(b.loadFromData(ba,"JPG")){
                            //          ui->label->setPixmap(b);
                            //      }
                            
                            }
                            
                            
                            1 Reply Last reply
                            0
                            • mrjjM mrjj

                              @J-Hilk
                              Do you know if write blocks ?
                              QByteArray ba; // local
                              ba.fill('A', 1000);
                              if(serialPort->isOpen()==true){
                              serialPort->write(ba); // blocks here ? as ba is by reference

                              J.HilkJ Offline
                              J.HilkJ Offline
                              J.Hilk
                              Moderators
                              wrote on last edited by
                              #28

                              @mrjj IIRC, it's passed on to the OS during the write call and that copies the data. But I'm not entirely sure 😬


                              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.

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

                                @mrjj IIRC, it's passed on to the OS during the write call and that copies the data. But I'm not entirely sure 😬

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by
                                #29

                                @J-Hilk
                                Yeah i was wondering since its a board if that still happens as it would
                                make sense we get cut if not.

                                @Rika
                                Can you try this

                                void serial::on_pushButton_2_clicked()
                                {
                                        static QByteArray ba;
                                        ba.fill('A', 1000);
                                        if(serialPort->isOpen()==true){
                                            serialPort->write(ba);
                                            qDebug()<<ba.size()<<"size_send:";
                                        }
                                }
                                

                                and tell me if we still only get up to 190 bytes with the sizeeeee message.

                                R 1 Reply Last reply
                                1
                                • mrjjM mrjj

                                  @J-Hilk
                                  Yeah i was wondering since its a board if that still happens as it would
                                  make sense we get cut if not.

                                  @Rika
                                  Can you try this

                                  void serial::on_pushButton_2_clicked()
                                  {
                                          static QByteArray ba;
                                          ba.fill('A', 1000);
                                          if(serialPort->isOpen()==true){
                                              serialPort->write(ba);
                                              qDebug()<<ba.size()<<"size_send:";
                                          }
                                  }
                                  

                                  and tell me if we still only get up to 190 bytes with the sizeeeee message.

                                  R Offline
                                  R Offline
                                  Rika
                                  wrote on last edited by
                                  #30

                                  @mrjj I tried, still only get 190.
                                  16 sizeeeee:
                                  32 sizeeeee:
                                  64 sizeeeee:
                                  64 sizeeeee:
                                  14 sizeeeee:

                                  mrjjM 1 Reply Last reply
                                  0
                                  • R Rika

                                    @mrjj I tried, still only get 190.
                                    16 sizeeeee:
                                    32 sizeeeee:
                                    64 sizeeeee:
                                    64 sizeeeee:
                                    14 sizeeeee:

                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #31

                                    @Rika
                                    Good testing.
                                    So even it says
                                    qDebug()<<ba.size()<<"size_send:";
                                    1000 size_send
                                    you only get
                                    5 lines of
                                    16 sizeeeee:
                                    32 sizeeeee:
                                    64 sizeeeee:
                                    64 sizeeeee:
                                    14 sizeeeee:
                                    ?

                                    R 1 Reply Last reply
                                    0
                                    • mrjjM mrjj

                                      @Rika
                                      Good testing.
                                      So even it says
                                      qDebug()<<ba.size()<<"size_send:";
                                      1000 size_send
                                      you only get
                                      5 lines of
                                      16 sizeeeee:
                                      32 sizeeeee:
                                      64 sizeeeee:
                                      64 sizeeeee:
                                      14 sizeeeee:
                                      ?

                                      R Offline
                                      R Offline
                                      Rika
                                      wrote on last edited by Rika
                                      #32

                                      @mrjj Sometimes 4 lines, sometimes 7 lines, but the total is 190 bytes. With 500-A, received only 230

                                      mrjjM 1 Reply Last reply
                                      0
                                      • R Rika

                                        @mrjj Sometimes 4 lines, sometimes 7 lines, but the total is 190 bytes. With 500-A, received only 230

                                        mrjjM Offline
                                        mrjjM Offline
                                        mrjj
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #33

                                        @Rika
                                        Ok
                                        if we do
                                        ba.fill('A', 10);
                                        do you then get all ?

                                        R 1 Reply Last reply
                                        0
                                        • mrjjM mrjj

                                          @Rika
                                          Ok
                                          if we do
                                          ba.fill('A', 10);
                                          do you then get all ?

                                          R Offline
                                          R Offline
                                          Rika
                                          wrote on last edited by
                                          #34

                                          @mrjj yes.

                                          mrjjM 1 Reply Last reply
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