But I have limit only use C++ and I understand in C++, it use POSIX for read serial port. Pin values can be read or written, to test functionality.These few lines of code are for open a serial communication via COM port, and start reading the stream coming from the connected device.Thomas1965 (4568) There is an easier way to deal with the serial port. Whenever the serial port sends a logical zero (0) a positive voltage is effected. Arduino and computer are connected by USB. If \a flowControl is true, then CTS/RTS flow control should be enabled on the device. When the data is being sent, there must be a few delay between bytes, so I give a 1ms delay (QThread::msleep(1) ). It's working for about 39 minutes, but after it stops at line serial. based on the rfid user manual that i read, in order to turn off the led of the reader, i need to send this command code via serial communication. How to read data from serial port in qt You can send data to serial devices in various formats such as string, binary, decimal, and hex to monitor the reaction of the serial device to specific commands or data strings.
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