QSerialPort proper sending of many lines
c++,qt,serial-port,qtserialport
You can use QSerialPort::waitForBytesWritten to ensure that the bytes are written. However this function would block the thread and it's recommended to use it in a new thread, otherwise your main thread would be blocked and your application freezes periodically.
QSerialPort new signal slot syntax no matching member function for call to 'connect'
The problem is that &QSerialPort::error is ambiguous: There's the signal you're trying to connect to: QSerialPort::error(QSerialPort::SerialPortError) But then there's also a getter with the same name: QSerialPort::error() That's unfortunate design of the QSerialPort class (QProcess has the same problem), and might be fixed in Qt 6, but not before that,...
How to setup QSerialPort on a separate thread?
c++,qt,qthread,qtcore,qtserialport
In short, it is a bad idea to use the QtSerialPort module like this. We designed this module based on QIODevice which already provides you non-blocking mechanism for your GUI application to use the QSerialPort class. You should look into the following signals: void QIODevice::bytesWritten(qint64 bytes) [signal] This signal is...
Driver CH341 USB Adapter Serial Port or QSerialPort not Works in Linux
linux,qt,linux-kernel,qtserialport
Thanks to the developers of Linux, solved my problem, the CH34x driver not implemented parity in the maillist is the link PATCH for those who have this problem in the future, not whether they apply to the official kernel, for now only way is rebuild the driver. http://marc.info/?l=linux-serial&m=139749273432052&w=2...
QtAddon SerialPort from Qt4 to Qt5
QtSerialPort is now a part of Qt. It officially became part of Qt with the 5.1.0 release. If you use the new version of Qt there is no need to get the source code separately and link to it. To use the module with Qt 5 add this line to...
QSerialPort effect on `/dev/ttyS*` after process end?
linux,qt,file-descriptor,filehandle,qtserialport
Under POSIX, terminal devices (that is, serial ports and pseudoterminals) have a whole bunch of settings which enable the computer to speak the multitude of variations on the basic RS-232 protocol that exist or have existed. A great deal of this API was designed back in the days when dinosaurs...
Connect Arduino with Qt
Problem has been solved: Qt: if (serial.isOpen() && serial.isWritable()) { QByteArray ba("R"); serial.write(ba); serial.flush(); qDebug() << "data has been send" << endl; serial.close(); } Arduino: int led = 13, avlb = 0; void setup() { Serial.begin(9600); pinMode(led, OUTPUT); Serial.println("started"); } void loop() { if (Serial.available() > 0) { Serial.println("available"); Serial.println(Serial.available());...
QSerialPort: how to adjust the emiting time of readysignal using number of bytes received
qt,serial-port,intervals,qtserialport
In general readyread signal would be emitted even if one byte is received. But the response time depends on many factors like the driver, CPU load or how much the Qt event-loop is busy. When a receive is detected in the serial port, all data in the driver buffer will...