Secondly, are you using the legacy 1.9 version of these bindings or the 2.0 versions?
The error you site usually means the user under which openhab 2 is running (the openhab user for atp-get installs) doesn’t have permission to read and write to the device. The usual solution is to add the openhab user to the dailout group.
There are a ton of things that can go wrong with exec. See
