Can QSerialPort read more than 512 bytes of data?

Question

I want to use QSerialPort to read data transmitted from a device. The device transmits a frame of 4000 data bytes each time. I try with the following simple code

Answer 1

There's no limit, but you don't necessarily receive all data in single chunk. You have to keep listening until you have the number of bytes you're waiting for (or a timeout).

void MainWindow::serialReceived()
{
    receivedData.append(serialPort->readAll());
    if(receivedData.size() >= 4000) {
       // we're full
    }
}