Issue using QSerialPort

GabRioux25

Hey, I am currently trying to make a video games using a controller made of an arduino. I am making the GUI with Qt since I found it really cool that it has an integrated serial port library. So right now i'm trying to set-up the communication of the arduino and the pc with QSerial port, so far I'm able to open the port (not a big deal but it took me hours lol), when I try to write in it it get this error :

<3,2,2,>QObject::startTimer: Timers can only be used with threads started with QThread

Here the com.h file :

#include <QSerialPort>
#include <iostream>

using namespace std;

class Comunication
{

public:
	void openSerial();
	Comunication();
	void closeSerial();
	bool sendData(int module, int* tabData, uint8_t tabSize);

private:
	QSerialPort* serial;

};

And here the com.cpp file

#include "com.h"

Comunication::Comunication() {

	serial = new QSerialPort;

}

void Comunication::openSerial() {


    serial->setPortName("COM5");
    serial->setBaudRate(QSerialPort::Baud9600, QSerialPort::AllDirections);
    serial->setDataBits(QSerialPort::Data8);
    serial->setParity(QSerialPort::NoParity);
    serial->setFlowControl(QSerialPort::NoFlowControl);
    serial->setReadBufferSize(5000);
    serial->open(QIODevice::ReadWrite);
    if (serial->isOpen()) {

        cout << "opened" << endl;
    }
     


}

void Comunication::closeSerial() {

    serial->close();
}


bool Comunication::sendData(int module, int* tabData, uint8_t tabSize)
{

    char txData[30];
    int index = 0;

    txData[index++] = '<';
    txData[index++] = module + '0';

    for (int i = 0; i < tabSize; i++)
    {
        txData[index++] = ',';

        if (tabData[i] != 'I') {
            char tempTab[15];

            int sizeTempTab = sprintf(tempTab, "%d", tabData[i]);

            for (int j = 0; j < sizeTempTab; j++)
            {
                txData[index++] = tempTab[j];
            }
        }
        else
            txData[index++] = 'I';
    }

    txData[index++] = ',';
    txData[index++] = '>';
    txData[index] = '\0';
    cout << txData;



    if (serial->isOpen()) {
        serial->write(txData, index);

    }

    return 0;

   
    
}

If anyone could help it would be much appreciated.

Have a great day/evening
PS: im using 6.2.3

Christian Ehrlicher

And do you use threads in your program?

using namespace std;

Please don't use 'using namespace FOO' in headers...

GabRioux25

I found the issue, it's all fixed, i'll post the solution tomorrow for those in the future who might have the same problem