This projected started as a openHAB 1 binding.
The upstream development of openHAB 1 is not completely stopped, but the main focus is moved to the openHAB 2 project now.
We are using this binding with the openHAB 2 compatibility layer for openHAB 1 bindings (compat1x), only.
The binding code uses OSGi service component annotations. The annotations are part of the OSGi™ Service Platform Compendium Specification Release 4 Version 4.3 and above.
openHAB 1 is currently using the version 4.2
So this binding will not work out of the box using the openHAB 1 runtime anymore.