Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Unable to send and receive images between 2 Raspberry connected to Zigbee via UART.
Forum Updated to NodeBB v4.3 + New Features

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

Scheduled Pinned Locked Moved Unsolved General and Desktop
42 Posts 4 Posters 7.0k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • 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
                                0
                                • R Rika

                                  @mrjj yes.

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #35

                                  @Rika
                                  So it seems data get cut over some size.

                                  What Os is running on the boards ?

                                  Also maybe Zigbee has some sort of max transfer size ?

                                  R 1 Reply Last reply
                                  0
                                  • mrjjM mrjj

                                    @Rika
                                    So it seems data get cut over some size.

                                    What Os is running on the boards ?

                                    Also maybe Zigbee has some sort of max transfer size ?

                                    R Offline
                                    R Offline
                                    Rika
                                    wrote on last edited by
                                    #36

                                    @mrjj I use raspbian. I tried using a PC connected to zigbee and sent photos to my Pi4 + Zigbee with Realterm, my Pi4 received the photos. I think the error is in the program sends the data.

                                    1 Reply Last reply
                                    0
                                    • J.HilkJ Offline
                                      J.HilkJ Offline
                                      J.Hilk
                                      Moderators
                                      wrote on last edited by
                                      #37

                                      well, lets narrow it down,
                                      write returns a quint64 with the actual number of bytes written to the serialport, what does that return ?

                                      void serial::on_pushButton_2_clicked()
                                      {
                                              static QByteArray ba;
                                              ba.fill('A', 1000);
                                              if(serialPort->isOpen()==true){
                                                  quint64 send = serialPort->write(ba);
                                                  qDebug()<<send << " of" << ba.size()<<"size_send:";
                                              }
                                      }
                                      

                                      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.

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

                                        well, lets narrow it down,
                                        write returns a quint64 with the actual number of bytes written to the serialport, what does that return ?

                                        void serial::on_pushButton_2_clicked()
                                        {
                                                static QByteArray ba;
                                                ba.fill('A', 1000);
                                                if(serialPort->isOpen()==true){
                                                    quint64 send = serialPort->write(ba);
                                                    qDebug()<<send << " of" << ba.size()<<"size_send:";
                                                }
                                        }
                                        
                                        R Offline
                                        R Offline
                                        Rika
                                        wrote on last edited by
                                        #38

                                        @J-Hilk 1000 of 1000 size.

                                        J.HilkJ 1 Reply Last reply
                                        0
                                        • R Rika

                                          @J-Hilk 1000 of 1000 size.

                                          J.HilkJ Offline
                                          J.HilkJ Offline
                                          J.Hilk
                                          Moderators
                                          wrote on last edited by
                                          #39

                                          @Rika well,
                                          to make sure your 2nd application is not simply very late in its creation/startup process, try clicking the button a 2nd time, see if something changes :D

                                          After that, time for a serial port listing device, to check what is actually transferred


                                          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

                                          • Login

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups
                                          • Search
                                          • Get Qt Extensions
                                          • Unsolved