Serial Port Server under Linux

[Charlie Morrison]

Hi Group

I am currently running SDC on Linux Mint and want to control my Expert Amp from it, however my serial ports come from a Moxa Nport serial server and the TTY allocations are ttyr0  not ttys0, as moxa like to call them "real" ports. is it possible to have these included in the Com port dropdown in SDC, particularly the PA tab. My current port allocations are ttyr08 to ttyr10

regards

Charlie GI4FUE

[UT4LW Yuri Pavlov]

The Qt documentation notes that some versions of Linux have an issue with the libraries used by Qt:

Port enumeration on Linux

By default Linux uses libudev to enumerate the available serial ports. If the library is not available, it falls back to reading files in the /sys/class/tty directory.

It is known that some versions of libudev have a bug and incorrectly report VID and PID of a USB hub instead of the actual device. In such cases, define the QT_SERIALPORT_SKIP_UDEV_LOOKUP environment variable to skip the libudev lookup and only use the information from the /sys/class/tty directory.

вторник, 14 июля 2026 г. в 00:40:56 UTC+3, gi4...@gmail.com:

[Charlie Morrison]

Hi Yuri

The Moxa Nport is not a USB device, it is a serial port server which allocates ports in linux as ttyr0 etc instead of the normal ttys0 etc. The ports are showing on my PC in the /sys/class/tty, but not showing in the dropdown on SDC under ports for PA control

Regards

Charlie GI4FUE

[Charlie Morrison]

Hi Yuri

Is it possible to achieve what I asked in my last email?  TTYr0 list showing in SDC instead of TTYs0

Charlie