Hi Arado,
Then you suggest I do a rules file like:
SUBSYSTEMS=="usb", ACTION=="add", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{serial}=="0001", MODE="0666", SYMLINK+="OnStep"
but change usb for ttyACM.? and left like next:
SUBSYSTEMS=="ttyACM", ACTION=="add", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{serial}=="0001", MODE="0666", SYMLINK+="OnStep"ç
Is necessary to add someone other parameter on the rules file for this case (Kernel, run, ...)?
Someone knows how to change (if it's possible) the serial of the device?
Thanks,
Pep

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