This isn’t a support forum– – it’s a community forum, where individual customers share their projects and questions for comment by other customers.
And There isn’t any official integration between SmartThings and a raspberry pi.
However, as @rontalley mentioned, there are many community members who are using raspberry pi with SmartThings in many different ways. It depends on specifically what you’re trying to accomplish.
For example, the following thread is a project report on how to use SmartThings to control relays attached to a raspberry pi
And this has a similar purpose, allowing SmartThings to control GPIO on a raspberry pi
While this thread is using a raspberry pi for IR control of audiovisual devices.
Quite a few project reports have used a raspberry pi as a “man in the middle” between SmartThings and some other protocol.
You can just search the forum for “raspberry” or check the project reports on the quick browse lists in the community – created wiki.
So the short answer is that there is no official integration, or universal integration. But there are a number of individual community members who have used a raspberry pi for different projects, and many have posted project reports about what they have done that you might find of interest.