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[SOLVED]Serialport permission programmatically



  • Hi!

    In my application I'm using a virtual serial port which is actually a USB-UART converter chip. If it is connected it recognized as /dev/ttyUSBx, where x=0...3. Each time I want to use that particular port I have to fire up the terminal and look it up with dmesg | grep ttyUSB*, then sudo chmod 0666 ttyUSBx to gain access. How can I do this programmatically?

    Thank you.


  • Lifetime Qt Champion

    Hi,

    Simpler (and more secure) way: check the group of ttyUSB* (if on *buntu should be dialout) and add your user to that group (don't forget to logout/login).

    If the group is root, add an udev rule to make so that the device gets another group and add your user to that group.

    Hope it helps.



  • Hi Sgaist,

    thank you for the tip! I added myself to the dialout group and after reboot my app was able to access the port. Cheers!


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