I have just installed OH2 with zwave binding. For some reason OH shows my zstick S2 offline stating that the device does not exist. My raspberry pi 3 shows my zstick on port /dev/ttyUSB0 but OH states it does not exist. I am guessing a permissions issue with OH under the user pi not having permissions to this port. Am I on the right track and if so, how do I go about giving everything the right permissions?