Secure receiving serial data (QSerialPort)

atilalms

Hello, everyone!

In my application, I need to receive 8 bytes everytime a button (hardware) is pressed. I have already checked the bytes with a terminal software and the transmission is ok.

I want to receive these bytes with QT, but sometimes the package comes wrong. I need help to build a secure routine to read the data without errors.

What is the problem with my program?

Until now I did this:

@
void ipd::serialReceived()
{
leitura = serial->readAll();
dado_serial.append(leitura); // Group the data until 8 bytes

    tamanho_serial += leitura.size();             // Size of data
    if (tamanho_serial >=8)                               // If size is bigger than 8,
    {
        qDebug()<< "--"<< cont++ <<"--";
        qDebug()<< dado_serial.toHex();

        dado.REG_END    = dado_serial.mid(0,1).toHex();             // Get each byte
        dado.REG_FUNC   = dado_serial.mid(1,1).toHex();
        dado.REGISTRO0  = dado_serial.mid(2,1).toHex();
        dado.REGISTRO1  = dado_serial.mid(3,1).toHex();
        dado.REGISTRO2  = dado_serial.mid(4,1).toHex();
        dado.REGISTRO3  = dado_serial.mid(5,1).toHex();
        dado.REG_CRCH   = dado_serial.mid(6,1).toHex();
        dado.REG_CRCL   = dado_serial.mid(7,1).toHex();

         // Clear variables
        dado_serial = 0;                                                                            
        tamanho_serial = 0;
        flag_conta_silencio = 1;
        serial->clear();

        
    }

}
@

kuzulis

You can take the Terminal example (from the QtSerialPort) and check received data. Of course, in case your data transferred in "string" form.