[Solved] How to send control command to POS printer?

Abin

Hi,

I am creating an application which prints text through a POS printer.

@#include "lanprinterui.h"
#include "ui_lanprinterui.h"

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

m_TextInput = ui->textEdit;
m_pSocket   = new QTcpSocket();
m_pSocket->connectToHost("192.168.1.20", 9100);
m_ConnectStatus = true;

QObject::connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(print()));

}

LanPrinterUI::~LanPrinterUI()
{
delete ui;
delete m_pSocket;
}

void LanPrinterUI::print()
{
const int Timeout = 5 * 1000;

if (!m_ConnectStatus)
{
    m_pSocket->connectToHost("192.168.1.20", 9100);
}

if (!m_pSocket->waitForConnected(Timeout))
{
    //sent error
    qDebug ("error in waitForConnected()");
    qDebug (qPrintable(m_pSocket->errorString()));
    m_ConnectStatus = false;
    return;
}

m_ConnectStatus = true;
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_0);
out << m_TextInput->toPlainText();
out << '\n';
m_pSocket->write(block);

}
@

The prints works fine. But for POS printer there are control commands to do certain functions like : paper cut, cashdraw open etc.. For eg:

Function: Partial cut
Code:
ASCII-------> ESC i
Hex --------> 1B 69
Decimal-----> 27 105

When I try to send command 27 105 it just prints on paper.. I'm not exactly sure how to send it... Can someone suggest how to write to the socket...

Abin

I got the solution from a different forum..

out << "\n\x1Bi";

Hope this would help someone else...

najeeb

@Abin hello albin ..can you please send me this full code...because im facing problem with printing using pos printer

Ariakas

@najeeb I second this. It would be great to download some source files of POS printing.