If you found this thread with similar problem, then it looks like resolution was combination from posts. To restate:
- Use Putty to log into OpenHabian, then
sudo openhabian-config
, then select “Apply Improvements”, Select “Packages” then “Fix Permissions” then “System Tweaks”. Exit out of openhabian-config tool. - Edit file /etc/default/openhab2. Change line
EXTRA_JAVA_OPTS=" -Xms250m -Xms350m"
toEXTRA_JAVA_OPTS=" -Xms250m -Xms350m -Dgnu.io.rxtx.SerialPorts=/dev/ttyUSB1"
- restart with
sudo systmctl restart openhab2