udev rule with few parent device attributes

Question

I need complex and universal udev rule to determine USB-device plugged in certain port of the any USB hub. so, i have to combine parent attributes of different laye

Answer 1

worked percect for me on my openhabian-system. I have two identical usb/modbus-adapters and now I can give them different symlinks: added these lines in my /etc/udev/rules.d/99-com.rules:

KERNEL=="ttyUSB[0-9]*", SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", ENV{USB_HUB_TYPE}="1a86:7523"
#
ENV{USB_HUB_TYPE}=="1a86:7523", KERNEL=="ttyUSB[0-9]*",SUBSYSTEM=="tty", KERNELS=="1-1.3:1.0", SYMLINK+="tty4800"
ENV{USB_HUB_TYPE}=="1a86:7523", KERNEL=="ttyUSB[0-9]*",SUBSYSTEM=="tty", KERNELS=="1-1.2:1.0", SYMLINK+="tty9600"