please read any documentation
On-board diagnostics - Wikipedia, the free encyclopedia and others about protocols used in OBD2
there is alot of names for same things.
name "KWP1281" is commonly used in VAG-COM for data transfers between VAG-COM interface and car parts (Engine, Air bags, etc,) see
Ross-Tech: VAG-COM: Audi B5 VAG-COM Info
Obduino32K will not connect to VAG specific components, it will use 33 address only. It is universal and universal protocol names are used.
Did u tried any of them already? Did u tested with voltmeter or smth if comunication is starting?