Can we able to plot the graph of wire which has to show the diameter in qt software

chandana

Hi,
In my project i am receiving the data from the embedded device in which we are receiving the diameter measurement value from the embedded device and we are storing these data to PC through the usb cable to RS232 converter in which the data's are storing in excel format. So here my question is can we able to plot the graph of these data which i am storing in excel sheet and next is can we able to plot this below attached format graph in qt software

SGaist

Hi and welcome to devnet,

Do you mean you would like to make Excel render this or within your Qt application.

chandana

Anything is fine for me

chandana

i want to try in qt software where i need to read the data from the usb to rs232 cable and need to plot the graph in real time
can you plz give me the example program for reading the data from this port

chandana

Hi,
I am using qt software for reading the data from the usb to rs232 converter and i have tried this program
#include <QCoreApplication>
#include <QtSerialPort/QSerialPort>
#include <QSerialPortInfo>
#include <QDebug>
#include <QFile>
#include <QByteArray>
#include<QString>

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QSerialPort serialPort;
QByteArray buf;

serialPort.open(QIODevice::ReadOnly);
serialPort.setPortName("COM10");
serialPort.setBaudRate(QSerialPort::Baud38400);
serialPort.setDataBits(QSerialPort::Data8);
serialPort.setParity(QSerialPort::EvenParity);
serialPort.setStopBits(QSerialPort::OneStop);
serialPort.setFlowControl(QSerialPort::NoFlowControl);

// while(1)
//{
//serialPort.write("h");
buf=serialPort.readAll();
qDebug() << "buf1 "<< buf;
serialPort.close();
//}

return a.exec();

}

and serial port.pro
QT = core
QT -= gui #-
QT += serialport

TARGET = Serial-port
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

INSTALLS += target

but i am getting like serial port is not open how to resolve this issue plz tell me
i am here by attaching the file

SGaist

You are blocking the event loop the way you wrote it.

Please take the time to review the examples of the QtSerialPort module.

kuzulis

@chandana said in Can we able to plot the graph of wire which has to show the diameter in qt software:

serialPort.open(QIODevice::ReadOnly);
serialPort.setPortName("COM10");

Besides, this sequene is wrong and makes not sense!