I’ve created a binding here. I’ll get it added to the marketplace in the coming days (it will take some time to get it approved I guess).
This will require the serial driver to also be installed through karaf -:
feature:install openhab-transport-serial
You should then be able to create a CC2531 coordinator and hopefully it will find devices ;).
This is pretty much a complete rewrite from the previous binding, and while it’s undergone a reasonable amount of testing recently, I’ve not focussed on device control features, so there could well be issues.
This should currently support switches, bulbs, color and temperature clusters at the moment - I’ll look to add more clusters once we see these are running well.
Let me know how it goes - you can raise issues here (there’s no source there yet - another job to get sorted in the next week or so), or discuss on the forum (I’m sure there will be issues 
) -: