Qt QSerialPort buffering - c++

Question

I am reading information from a serial port. How do I wait for a newline to come in, and then deal with the data? That is, how do I make sure I'm chunking a whole line at a time.
This code does not work:
void MainWindow::readData()
{
QByteArray data = serial->readAll(); //reads in one character at a time (or maybe more)
console->putData(data);
charBuffer.append(data);
if (data.contains("\n")) //read into a structure until newline received.
{
//call parsedata
sensorValues->parseData(charBuffer); //send the data to be parsed.
//empty out the structure
charBuffer = "";
}
}
Let's say the serial port sends "Sensor1 200\n".
data might contain the following: "Se" then "n", "sor 2" "00\n" and so on.
How do I block calling parseData until I have a line of text?
Additional info:
readData is set up as a slot:
connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));

Answer 1

Have you not tried using the SerialPort readLine() function? after each readline(), you can send the line to some new ByteArray or QString to be parsed up. I also use .trimmed() on the end to remove the '\r' and '\n' characters, so I can do something like so:
void MainWindow::readData()
{
while (serial->canReadLine()){
QByteArray data = serial->readLine(); //reads in data line by line, separated by \n or \r characters
parseBytes(data.trimmed()) ;
}
}
void MainWindow::parseBytes(const QByteArray &data) <--which needs to be moved to separate class, but here it's in the MainWindow, obviously improper
{
if (data.contains("1b0:"))
{
channel1Data.b0_code = data.mid(5); // which equals "1",
//do stuff or feed channel1Data.b0_code to a control
}
}

Answer 2

Make a static variable and then store data until you got an \n
void readData()
{
// Read data
static QByteArray byteArray;
byteArray += pSerialPort->readAll();
//we want to read all message not only chunks
if(!QString(byteArray).contains("\n"))
return;
//sanitize data
QString data = QString( byteArray ).remove("\r").remove("\n");
byteArray.clear();
// Print data
qDebug() << "RECV: " << data;
//Now send data to be parsed
}