DLL Import Functions

A custom internal adapter can import DLL import functions, which provide useful functionalities for implementing a custom adapter.

• Error Handler Functions
  Describes various error handler utility APIs used by custom internal adapters.
• Parameter Handler Functions
  Describes various parameter handler utility APIs used by custom internal adapters.
• Data Conversion Functions
  The ESP Server uses these APIs to convert data within the custom internal adapter implementation.
• Callback Functionality
  An adapter implementation can use callback functions to log on to the ESP Server, retrieve information related to schemas, and convey state information to the ESP Server.