Adding serial port in OpenHAB2

Habmin2 doesn’t work for me sadly… the interface loads up fine, but barely anything is clickable, and occasionally a %%KEY_NOT_FOUND%% error appears in the top-right when I try and select something. e.g. when trying to Chart my Presence status:

2016-04-12 22:12:18.291 [DEBUG] [.jetty.server.handler.ContextHandler] - scope null||/rest/persistence/Presence @ HttpServiceContext{httpContext=DefaultHttpContext [bundle=org.openhab.ui.habmin_2.0.0.201603311030 [159], contextID=default]}

Shame really, I’d love to use it, but have searched high and low and can’t find what that error means so have given up for the time being.

On the upside at least I’ve solved my own problem here… all the config is in runtime/karaf/etc/openHAB-wrapper.conf … inside that is a long list of JVM parameters, so I just added one to the end saying wrapper.java.additional.22=-Dgnu.io.rxtx.SerialPorts=/dev/serial/by-id/usb-0658_0200-if00 and now the port is enabled!