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You can limit the size of the read buffer using setReadBufferSize(). If not all the data is read at once, the remaining data will be available for later as new incoming data is appended to the QSerialPort's internal read buffer. Alternatively the readLine() and readAll() convenience methods can also be invoked. Once you know that the ports are ready to read or write, you can use the read() or write() methods.

It is also possible to use the pinoutSignals() method to query the current pinout signals set. There are a couple of properties to work with the pinout signals namely: QSerialPort::dataTerminalReady, QSerialPort::requestToSend. You can reconfigure the port to the desired setting using the setBaudRate(), setDataBits(), setParity(), setStopBits(), and setFlowControl() methods. Having successfully opened, QSerialPort tries to determine the current configuration of the port and initializes itself. Use the close() method to close the port and cancel the I/O operations. Note: The serial port is always opened with exclusive access (that is, no other process or thread can access an already opened serial port).

SetStopBits(QSerialPort::StopBits stopBits) SetPort(const QSerialPortInfo & serialPortInfo) SetFlowControl(QSerialPort::FlowControl flowControl) SetDataBits(QSerialPort::DataBits dataBits) SetBaudRate(qint32 baudRate, QSerialPort::Directions directions = AllDirections) QSerialPort(const QString & name, QObject * parent = nullptr)īaudRate(QSerialPort::Directions directions = AllDirections) constĬlear(QSerialPort::Directions directions = AllDirections) QSerialPort(const QSerialPortInfo & serialPortInfo, QObject * parent = nullptr)