Problem Solved -- Connecting to Console Port SG-1100 (Linux)

  • Running Ubuntu 18.04, attempting to connect to the Console Port (USB to Serial adapter in the SG-1100) was unsuccessful. But I found the solution. Hope this helps someone ...

    I tried installing putty, but putty would not connect to the serial port. dmesg indicated that the pl2303 was being recognized, the correct driver was installed, and the port was indeed /dev/ttyUSB0. But putty failed with:

    (putty:1657) Gtk-CRITICAL ... gtk_box_gadget_distribute ... failed in GtkScrollbar

    I finally gave up on PuTTY.

    The cu command also failed. I tried

    $ cu -l /dev/ttyUSB0 -s 115200

    but even if i ran it as root (sudo ...) it failed.

    cu: open (/dev/ttyUSB0): permission denied
    cu: /dev/ttyUSB0: Line in use

    lsof showed that there were no processes using that device.

    I installed screen

    $ sudo apt-get install screen

    and then ran

    $ sudo screen /dev/ttyUSB0 115200

    Success! I'm in.

  • Rebel Alliance Netgate Administrator

    Yes, screen is amazing.

    This is why we suggest it in our help document:

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