Philippe :

I just checked again and my user name is listed in the dialout group.
I did not use a serial number for either my focuser or mount in rules.d as both were identical and would not serve to identify one from the other. Many examples I saw on the internet including those already installed by EKOS in rules.d did not list a serial number. But I can try that even though they are identical and see if it makes a difference.

Right now, if I plug in both usb devices plugs one after the other, with the computer running, and set my permissions manually for ttyusb0 and ttyusb1both devices function correctly.
The rules.d file is in at least two places on my computer, once under /etc/udev/rules.d and a second under /lib/udev/rules.d/. Do I need to install a new "my observatory-rules.d " in each place? Right now I only put the new file in lib/udev/rules.d/.
Thanks
Jon

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