Qt serial port class

Note: The serial port has to be open before trying to set or get this property; otherwise false is returned and the error code is set to NotOpenError. The default value is NoFlowControl , i. If the flag is true then the RTS signal is set to high; otherwise low. Note: An attempt to control the RTS signal in the HardwareControl mode will fail with error code set to UnsupportedOperationError , because the signal is automatically controlled by the driver. Constructs a new serial port object with the given parent to represent the serial port with the specified helper class serialPortInfo.

Constructs a new serial port object with the given parent to represent the serial port with the specified name. The name should have a specific format; see the setPort method.

This signal is emitted after the baud rate has been changed. The new baud rate is passed as baudRate and directions as directions. This signal is emitted after the data bits in a frame has been changed.

The new data bits in a frame is passed as dataBits. This signal is emitted after the state high or low of the line signal DTR has been changed. The new the state high or low of the line signal DTR is passed as set. Note: Notifier signal for property dataTerminalReady. This signal is emitted when an error occurs in the serial port. The specified error describes the type of error that occurred. This signal is emitted after the flow control mode has been changed.

The new flow control mode is passed as flow. Note: Notifier signal for property flowControl. This signal is emitted after the parity checking mode has been changed. The new parity checking mode is passed as parity. This signal is emitted after the state high or low of the line signal RTS has been changed. The new the state high or low of the line signal RTS is passed as set. Note: Notifier signal for property requestToSend. This signal is emitted after the number of stop bits in a frame has been changed.

The new number of stop bits in a frame is passed as stopBits. See also bytesToWrite and read. Returns the number of bytes that are waiting to be written. The bytes are written when control goes back to the event loop or when flush is called.

See also bytesAvailable and flush. Returns true if a line of data can be read from the serial port; otherwise returns false. Discards all characters from the output or input buffer, depending on given directions directions.

This includes clearing the internal class buffers and the UART driver buffers. Also terminate pending read or write operations. If successful, returns true ; otherwise returns false. Note: The serial port has to be open before trying to clear any buffered data; otherwise returns false and sets the NotOpenError error code. Note: The serial port has to be open before trying to close it; otherwise sets the NotOpenError error code. This function writes as much as possible from the internal write buffer to the underlying serial port without blocking.

If any data was written, this function returns true ; otherwise returns false. Call this function for sending the buffered data immediately to the serial port. The number of bytes successfully written depends on the operating system.

In most cases, this function does not need to be called, because the QSerialPort class will start sending data automatically once control is returned to the event loop. However it gives me the error "undefined reference to vtable for 'mySerialport'".

And the constructor cannot be of void type neither right? So you wrote those, cool! I'm going to check out those examples. Do you have something with an implemented protocol for interfacing for instance an arduino? The problem regarding the "vtable error" seemed to be solved by running clean and rebuild.

Thank you! Also, protocol depends on you, not me. Please read this, meta. Show 3 more comments. Qt parent-child relationships have nothing to do with inheritance. Yes, it seems you got it: serial will be deleted with its parent — MainWindow. Dmitry Markin Dmitry Markin 1, 8 8 silver badges 8 8 bronze badges.

Sign up or log in Sign up using Google. Sign up using Facebook. See also manufacturer and serialNumber. Returns true if there is a valid bit product number present; otherwise returns false.

See also productIdentifier , vendorIdentifier , and hasVendorIdentifier. Returns true if there is a valid bit vendor number present; otherwise returns false. See also vendorIdentifier , productIdentifier , and hasProductIdentifier. Returns whether this QSerialPortInfo object holds a serial port definition. QSerial PortInfo is an auxiliary class that can provide various information about the available serial ports in a computer. First, the use of QSerial PortInfo is introduced. Here is a simple example to illustrate all serial devices on a computer.

Usually, we need to specify a program to use a certain serial port. At this time, we can not only use the serial name, because the serial name of the USB serial port may change every time it is inserted on different USB ports.