Serial port Communication with pc through serial Adapter
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@sankarapandiyan
ok, lets simplify your code, I assumereceiveandaknowmntare QTextEdits or QTextBrowser, since they have atoPlainTextfunctionvoid MainWindow::checkAndSendData() { if(!m_lines.isEmpty()){ QByteArray baToSend = m_lines.takeFirst().toUtf8(); serial->write(baToSend); ui->aknowmnt->append("Sent Message --> "+ QString(baToSend)); } else { ui->aknowmnt->append("All are send "); } }void MainWindow::serialReceived() { QString glen = serial->readAll(); if (glen.length()>0){ ui->receive->append( "Received -->" + QString(glen)); } QMetaObject::invokeMethod(this, &MainWindow::checkAndSendData, Qt::QueuedConnection); }@J-Hilk said in Serial port Communication with pc through serial Adapter:
ok, lets simplify your code, I assume receive and aknowmntare QTextEdits or QTextBrowser, since they have a toPlainTextfunction
Yes Its a QTextEdits
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@J-Hilk
Yes i have tried this method , the correct data is not shown in the receiver side ..
void MainWindow::on_pushButton_clicked() { serial = new QSerialPort (this) ; serial->setPortName(ui->comboBox->currentText()); serial->setBaudRate (QSerialPort::Baud115200); serial->setDataBits(QSerialPort::Data8); serial->setParity (QSerialPort::NoParity); serial->setStopBits (QSerialPort::OneStop); serial->setFlowControl(QSerialPort::NoFlowControl); serial->open(QIODevice::ReadWrite); // connect(serial,SIGNAL(readyRead()),this, SLOT (serialReceived())); connect(serial, &QSerialPort::readyRead,this, &MainWindow::serialReceived); ui->progressBar->setValue(100); // ui->receive->clear(); } void MainWindow::checkAndSendData() { if(!m_lines.isEmpty()){ QByteArray baToSend = m_lines.takeFirst().toUtf8(); serial->write(baToSend); ui->aknowmnt->append("Sent Message --> "+ QString(baToSend)); } else { ui->aknowmnt->append("All are send "); } } void MainWindow::on_send_clicked() { line = ui->sender->toPlainText(); QString txt1 = ui->receive->toPlainText(); /*QString*/ txt3 = ui->aknowmnt->toPlainText(); if(m_lines.isEmpty()){ QFile inputFile(QString("/home/adx-soft1/Shankar/serial/myfile1.txt")); inputFile.open(QIODevice::ReadOnly); if (!inputFile.isOpen()) return; QTextStream stream(&inputFile); while (!stream.atEnd()){ line = stream.readLine(); m_lines.append(line+QString("\r\n")); } } checkAndSendData(); } void MainWindow::serialReceived() { QString glen = serial->readAll(); if (glen.length()>0){ ui->receive->append( "Received -->" + QString(glen)); } QMetaObject::invokeMethod(this, &MainWindow::checkAndSendData, Qt::QueuedConnection); }@sankarapandiyan
you're obviously receiving non ascii bytesvoid MainWindow::serialReceived() { QByteArray glen = serial->readAll(); if (glen.length()>0){ ui->receive->append( QString("Received --> %1").arg(QString(glen.toHex(' '))); } QMetaObject::invokeMethod(this, &MainWindow::checkAndSendData, Qt::QueuedConnection); }
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@sankarapandiyan
you're obviously receiving non ascii bytesvoid MainWindow::serialReceived() { QByteArray glen = serial->readAll(); if (glen.length()>0){ ui->receive->append( QString("Received --> %1").arg(QString(glen.toHex(' '))); } QMetaObject::invokeMethod(this, &MainWindow::checkAndSendData, Qt::QueuedConnection); }@J-Hilk said in Serial port Communication with pc through serial Adapter:
void MainWindow::serialReceived()
{
QByteArray glen = serial->readAll();
if (glen.length()>0){
ui->receive->append( QString("Received --> %1").arg(QString(glen.toHex(' ')));
}
QMetaObject::invokeMethod(this, &MainWindow::checkAndSendData, Qt::QueuedConnection);}
this out put is what i receive from another pc
And the next below image is shown as a data send as some thing different
Even Now also i did not get the exact output sir what should i do i am stuck here .. @J-Hilk
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@J-Hilk said in Serial port Communication with pc through serial Adapter:
void MainWindow::serialReceived()
{
QByteArray glen = serial->readAll();
if (glen.length()>0){
ui->receive->append( QString("Received --> %1").arg(QString(glen.toHex(' ')));
}
QMetaObject::invokeMethod(this, &MainWindow::checkAndSendData, Qt::QueuedConnection);}
this out put is what i receive from another pc
And the next below image is shown as a data send as some thing differentEven Now also i did not get the exact output sir what should i do i am stuck here .. @J-Hilk
@sankarapandiyan Maybe it is a silly question, but are you sure the serial settings your are using, are correct?
- 115200 bauds?
- 8 bits?
Are you using a crossed/null modem serial cable? ==> cf https://en.wikipedia.org/wiki/Null_modem.
It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth. (Sherlock Holmes)
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@sankarapandiyan Maybe it is a silly question, but are you sure the serial settings your are using, are correct?
- 115200 bauds?
- 8 bits?
Are you using a crossed/null modem serial cable? ==> cf https://en.wikipedia.org/wiki/Null_modem.
@KroMignon I am Using hl-340 usb-serial adapter . so here , what i want to give as a baud rate.
void MainWindow::on_pushButton_clicked() { serial = new QSerialPort (this) ; serial->setPortName(ui->comboBox->currentText()); serial->setBaudRate (QSerialPort::Baud115200); serial->setDataBits(QSerialPort::Data8); serial->setParity (QSerialPort::NoParity); serial->setStopBits (QSerialPort::OneStop); serial->setFlowControl(QSerialPort::NoFlowControl); serial->open(QIODevice::ReadWrite); connect(serial,SIGNAL(readyRead()),this, SLOT (serialReceived())); ui->progressBar->setValue(100); // ui->receive->clear(); } -
@KroMignon I am Using hl-340 usb-serial adapter . so here , what i want to give as a baud rate.
void MainWindow::on_pushButton_clicked() { serial = new QSerialPort (this) ; serial->setPortName(ui->comboBox->currentText()); serial->setBaudRate (QSerialPort::Baud115200); serial->setDataBits(QSerialPort::Data8); serial->setParity (QSerialPort::NoParity); serial->setStopBits (QSerialPort::OneStop); serial->setFlowControl(QSerialPort::NoFlowControl); serial->open(QIODevice::ReadWrite); connect(serial,SIGNAL(readyRead()),this, SLOT (serialReceived())); ui->progressBar->setValue(100); // ui->receive->clear(); }@sankarapandiyan said in Serial port Communication with pc through serial Adapter:
I am Using hl-340 usb-serial adapter
Okay, that's for having a RS232 port on you PC, but to connect two PC you need a "null modem" cable (to cross Tx and Rx signal between the 2 serial ports).
Have you something like this?It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth. (Sherlock Holmes)
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@sankarapandiyan said in Serial port Communication with pc through serial Adapter:
I am Using hl-340 usb-serial adapter
Okay, that's for having a RS232 port on you PC, but to connect two PC you need a "null modem" cable (to cross Tx and Rx signal between the 2 serial ports).
Have you something like this?@KroMignon Yes you are right ..
this is my null modem i am using
I dontknow i am ryt or wrong and i am new to this topic .. the above image shows my serial adapter with null modem
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@KroMignon Yes you are right ..
this is my null modem i am using
I dontknow i am ryt or wrong and i am new to this topic .. the above image shows my serial adapter with null modem
@sankarapandiyan Okay, so the hardware side seems to be right. Can you give your software environnement:
- Operation system you are using (Linux ? Windows? MacOS?)
- Qt Kit Version you are using (not Qt Creator version!)
It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth. (Sherlock Holmes)
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@sankarapandiyan Okay, so the hardware side seems to be right. Can you give your software environnement:
- Operation system you are using (Linux ? Windows? MacOS?)
- Qt Kit Version you are using (not Qt Creator version!)
Operation system you are using (Linux ? Windows? MacOS?)
Linux_Ubuntu18.04.3
Qt Kit Version you are using (not Qt Creator version!)
**I dont know how to find the Qt kit version but any way little bit i have find out i think ..the below image shows the version of kit ** @KroMignon
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Operation system you are using (Linux ? Windows? MacOS?)
Linux_Ubuntu18.04.3
Qt Kit Version you are using (not Qt Creator version!)
**I dont know how to find the Qt kit version but any way little bit i have find out i think ..the below image shows the version of kit ** @KroMignon@sankarapandiyan said in Serial port Communication with pc through serial Adapter:
Linux_Ubuntu18.04.3
Have you tried your serial interface with another tool like cutecom.
On Ubuntu/Debian, you can install it withapt-get install cutecom
It is an old maxim of mine that when you have excluded the impossible, whatever remains, however improbable, must be the truth. (Sherlock Holmes)
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@sankarapandiyan said in Serial port Communication with pc through serial Adapter:
Linux_Ubuntu18.04.3
Have you tried your serial interface with another tool like cutecom.
On Ubuntu/Debian, you can install it withapt-get install cutecom
