Static udev for Insteon PLM

Trying to create a static udev for my insteon PLM, just in case the ttyUSB# link changes.

Under “normal” conditions, the PLM attaches at ttyUSB0. Using udev rules /etc/udev/60-insteon.rules
KERNEL=="ttyUSB0", SYMLINK+="insteon" OPTIONS+="link_priority=-100"

I get a symlink from /dev/insteon -> /dev/ttyUSB0, and my insteon plm binding of /dev/insteon works.

However I’m about to add a zigbee and zwave usb adapter, and I’m concerned about the ttyUSB# links changing.

So I changed the rules file to read:
SUBSYSTEM=="usb", ATTRS{serial}=="A906XKUV", SYMLINK+="insteon"
(I also changed the orignal rule above to be insteon2

A906XKUV is the proper serial as listed by
udevadm info --query all --name /dev/ttyUSB0

After that I have:
[01:26:57] openhabian@openhab:/etc/udev/rules.d$ ls -alh /dev/ttyUSB0 /dev/insteon /dev/insteon2 /dev/bus/usb/001/005
crw-rw-r-- 1 root dialout 189, 4 Jan 2 00:56 /dev/bus/usb/001/005
lrwxrwxrwx 1 root root 15 Jan 2 00:56 /dev/insteon -> bus/usb/001/005
lrwxrwxrwx 1 root root 7 Jan 2 00:56 /dev/insteon2 -> ttyUSB0
crw-rw---- 1 root dialout 188, 0 Jan 2 00:56 /dev/ttyUSB0

So permission do not seem to be an issue.

I’ve also updated /etc/default/openhab2
XTRA_JAVA_OPTS="-Xms250m -Xmx350m"

But the log file still complains on startup and the binding doesn’t work
2020-01-02 01:30:38.581 [ERROR] [onplm.internal.driver.SerialIOStream] - got no such port for /dev/insteon

2020-01-02 01:30:38.584 [ERROR] [g.insteonplm.InsteonPLMActiveBinding] - initialization complete, but found no ports!

openhab is a member of the dialout group

Any thoughts as to what I’m missing?

Have you added openhab to tty group?

Yes, openhab is–and has been–a member of the tty group. (Sorry for slow response, I was at work).