udev rules for xp-pen tablet

gistfile1.txt

Tested on Manjaro Linux
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$ cat /etc/udev/rules.d/98-xppen.rules 
ACTION=="add", SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ENV{PRODUCT}=="28bd/904/0", RUN+="/bin/su root  -c '/opt/Linux_Pentablet/Pentablet_Driver.sh'"

$ cat /opt/Linux_Pentablet/Pentablet_Driver.sh 
#!/bin/sh

HOME=/home/ivan

appname=`basename $0 | sed s,\.sh$,,`
dirname=`dirname $0`
tmp="${dirname#?}"
if [ "${dirname%$tmp}" != "/" ]; then
dirname=$PWD/$dirname
fi
LD_LIBRARY_PATH=$dirname/lib
export LD_LIBRARY_PATH
DISPLAY=:0 $dirname/$appname "$@"





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Notes: in the Pentablet_Driver.sh script you need to add HOME and DISPLAY vars. 
To reload udev rules without reboot use:  sudo udevadm control --reload