Symbian S60v5 QT UDP reading not working!

[PoVo]

Hi! I am unable to read info from UDP using this source on my phone. It connects to my PC and reads info from a game. The app works fine in Qt debugger when running on PC, however on the phone it doesn't work. I also don't see a Wi-Fi logo on the phone, when running.

I tried to set up QNetwork, and connect to the default access point, but that wouldn't start on the phone when installed. It just displayed the loading mark, and never opened. In Debugger when launching on phone it says "Could not start application: General OS-related error" But If I remove the network parts, it starts.

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtNetwork/QUdpSocket>
#include <QtNetwork/QHostAddress>
#include <QtNetwork>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    MainWindow::setUpOG();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::setUpOG()
{
    //ui->label->setText("Hi!");
    MainWindow::setWindowTitle("SymGauge");

    MainWindow::udpSocket = new QUdpSocket(this);
    MainWindow::udpSocket->bind(QHostAddress::Any, 30000);
    connect(MainWindow::udpSocket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams()));
}

 void MainWindow::readPendingDatagrams()
 {
     while (MainWindow::udpSocket->hasPendingDatagrams())
     {
         if(MainWindow::udpSocket->pendingDatagramSize() == 92)                               //Check if the incoming packet is 92 bytes long.
         {
         QByteArray datagram;
         datagram.resize(udpSocket->pendingDatagramSize());
         QHostAddress sender;
         quint16 senderPort;

         udpSocket->readDatagram(datagram.data(), datagram.size(),
                                 &sender, &senderPort);

         ui->label->setText("Received datagram");
         processTheDatagram(datagram);
     }
         else { MainWindow::udpSocket->readDatagram(NULL, 0, NULL, NULL); }
     }
 } 

and my .pro:

#-------------------------------------------------
#
# Project created by QtCreator 2010-12-19T11:52:41
#
#-------------------------------------------------

QT       += core gui network

TARGET = gauuuge
TEMPLATE = app

SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

CONFIG += mobility
MOBILITY += bearer

symbian {
    TARGET.UID3 = 0xe52771aa
    TARGET.CAPABILITY += NetworkServices
    TARGET.EPOCSTACKSIZE = 0x14000
    TARGET.EPOCHEAPSIZE = 0x020000 0x800000
}
symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
symbian:TARGET.CAPABILITY = NetworkServices 

Thanks.

[tamhanna]

Hi,
are you on Qt 4.7.1?

[PoVo]

Hi,
are you on Qt 4.7.1?

Hi, thanks, that solved the problem, I was on Qt 4.7.0

Now another problem, is there any way to keep the Backlight on? As this application displays Speed, RPM and Gear from a game, I need the light to stay on.

Thanks!

[tamhanna]

Actually, this is strange. Network on 4.7.1 works bad for me.

[PoVo]

Actually, this is strange. Network on 4.7.1 works bad for me.

This code below works very well for me:

This is in the SetUpOG();

// Set Internet Access Point
    QNetworkConfigurationManager manager;
    const bool canStartIAP = (manager.capabilities()
        & QNetworkConfigurationManager::CanStartAndStopInterfaces);
    QNetworkConfiguration cfg = manager.defaultConfiguration();
    if (!cfg.isValid() || !canStartIAP) {
    }
    MainWindow::session = new QNetworkSession(cfg, this);
    MainWindow::session->open();
    MainWindow::session->waitForOpened(); 

This is the header:

public:
    QNetworkSession* session; 

[PoVo]

Sorry for double posting, but is there anyway to keep the backlight on?

I tried searching, but couldn't find any answers.

Povo.

[jupaavola]

Sorry for double posting, but is there anyway to keep the backlight on?

I tried searching, but couldn't find any answers.

Povo.

Maybe this helps:

User::ResetInactivityTime()

You can retrieve backlight on/off state from HAL but I don't remember was there any P&S or ActiveObjects for it, so you need to create own timer what calls this ResetInactivityTime(). Qt may have own function for this.

[PoVo]

Maybe this helps:

User::ResetInactivityTime()

You can retrieve backlight on/off state from HAL but I don't remember was there any P&S or ActiveObjects for it, so you need to create own timer what calls this ResetInactivityTime(). Qt may have own function for this.

And what include do I have to specify to use this?

"#include <Qwhateverthenameis>"

[jupaavola]

And what include do I have to specify to use this?

"#include <Qwhateverthenameis>"

No, it's symbian code but you can use it in Qt app aswell.

#include <e32std.h>

IIRC, libs += -leuser

[teknikko]

I have tried too to connect with UDP socket/protocol to my local pc via WLAN from my phone.

And i think, that because UDP socket is not "connected" way behavioring socket, but is "unconnected"
way behavioring, then the phone is not acting as the same way as pc connected
udp-sokcet connection does.

"Becaus of", phone is not same way connected "to wired lan/wlan" when you command
from phone to connect to lan, to connect to near envrinomnet, as pc does.

You need TCP socket when you want to connect and change data
beetween your phone and another end with ip address.

But why phone is not acting as pc acts with udp socket - i do not know.
But i think, that Nokia guys knows the reason, why udp socket practices
in phone are not working as pc udp socket is working in pc's remote environment.

[PoVo]

Are you sure you didn't copy my the line from my code:

  if(MainWindow::udpSocket->pendingDatagramSize() == 92)                               //Check if the incoming packet is 92 bytes long. 

Because it checks the size of the datagram, and if it's not 92 it doesn't process it. (NOT ALL DATAGRAMS ARE 92 BYTES, the game I'm using has 92 byte sized datagrams outputted so I use it to check if it's not corrupted etc.

[epenttin]

Actually, this is strange. Network on 4.7.1 works bad for me.

Do you have more details about this? Have you installed Open C 1.7.5? On what device(s) and any specific FW?

- Eero

[tamhanna]

Hi,
sorry for my large delay due to the new years eve.

I have already posted a few bug reports re this. Please send an email to tamhan at tamoggemon point com if you want to discuss further!