Hello everyone, i'm making my own my focuser pro 2, based on an arduino nano (chinese driver ch340), before i get all integrated,  i connected the arduino to the raspberry pi 4, (without motor driver ULN2003 and motor), i expected to get any positive response from ekos but nothing happens.

i expected to get the device listed with the "lsusb" command, even i enabled the serial port (raspi-config), i concern to finish the focuser and never get connected.
I'm using astroberry 2.0.4.
There's any step i miss to get the focuser work ?
I need to use an original arduino nano?
I appreciate any help.
Thanks.

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