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Consuming Messages from Java
To illustrate how Eclipse Hono™ can be integrated with Java code, a simple application is provided that consumes telemetry and event data for devices belonging to the default tenant. It also includes support for Command and Control: if indicated by a received downstream message that contains a ttd value (refer to Device notifications for details) it tries to send a command to the device. If the value of ttd indicates that the device stays connected for an unlimited time (ttd == -1), the application will periodically repeat to send a command until notified the device is disconnected again (ttd == 0).
Implement a Custom Hono HTTP Protocol Adapter
Eclipse Hono™ comes with a default HTTP Adapter which can be used to interact with devices via HTTP. The default HTTP Adapter also serves as a blueprint for implementing a custom HTTP protocol adapter.