There are some suggestions in the replies to this post:
Take a look there and see if those get you started.
-- Craig A.
There is the SAPODataConnector that enables the connection to the SAP Netweaver Gateway through the ODdata specification.
This connector is available by default in ThingWorx 8.
Is you integration based on an SAP OData Service ?
If you are interested in OData integration using the SAPODataConnector, I have create a blog post with basic setup procedure : SAPODataConnector hands-on (8.0)