Design Components

A DLNA device uses UDP, HTTP, XML and SOAP to discover and manage services, which adds quite some complexity.

I implemented the functionality from scratch using the standart Arduino Network API and avoided external dependencies.

The DLNAControlPoint sets up a control point and lets you execute actions. The DLNADevice class provides the setup for a basic DLNA device service. Devices are represented by the DLNADeviceInfo class. A device registers itself on the network and answers UDP DLNA queries and requests:

• UDP communication is handled via a Scheduler and a Device Request Parser.
• HTTP requests are handled with the bundled TinyHttp Server.
• XML is generated dynamically and not stored in RAM
• XML service descriptions can be stored as char arrays in PROGMEM or generated dynamically using the XMLPrinter class
• XML Parsing can be done using the XMLParser, XMLParserPrint and XMLAttributeParser

Developing and debugging on a microcontroller is tedious; therefore this project can also be compiled and run on a Linux os OS X desktop.