Package credentials implements a REST interface which provides device credentials to things The package generates a single endpoint where things can download credentials which allow them to authenticate as a device.

Package mqtt provides the IoT broker with device twin support A device twin is a set of JSON objects, each described with a unique key.

Package twin provides the REST interface for the core IoT appliance device twin A device twin is a set of JSON objects, each described with a unique key.

MessagePublisher is an interface to publish MQTT message.