Listen to RFID input device
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Hello guys on my current project I have to implement a user authentication via RFID reader.
The user gets an RFID key. The system provides the RFID scanner. When the user want to access the application he/she has to login with his/her RFID key.
How can I listen to such input device and emit signals on input detection ?
The RFID reader acts like a keyboard device. You scan the RFID chip and get an ID. -
Hi,
Is it seen like a keyboard or is it a serial device that sends char ?
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Schneidi,
As far as I know it isn't possible to reconfigure RFID readers which act like a keyboard to behave in a way that they submit a stream. This problem is well-known, the same problem exists with Barcode scanners which emulate a keyboard. This stuff is just not reliable, and leads to confusion with the "real" keyboard input. You might use keyboard emulated devices when there is no physical keyboard available, but I guess that is rarely the case.
If you want to read the device input like a stream, you need to use a RFID scanner which is connected as a serial device and is accessible over a system COM port. If you are using COM ports, I highly recommend you to use the QSerialPort class which was introduced with Qt 5.
