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KLineKWP1281Lib is a library designed for communicating with VAG control modules which use the proprietary VAG Key-Word 1281 protocol (KWP1281/KW1281), through an Arduino / ESP / RPi Pico development board.

• Ability to use any method to send and receive data (best being a hardware serial port, or software serial if an additional port is not available)
• Ability to keep the connection alive while doing other tasks
• Connecting to any control module that supports KWP1281
• Reading the module's part number + extra fields, coding, WSC
• Recoding
• Performing a login operation
• Reading stored fault codes and their elaboration
• Clearing stored fault codes
• Reading, testing and saving an adaptation value
• Reading measuring blocks, calculating a measurement's value and providing its units (or text from a table, where applicable)
• Reading ROM / EEPROM (firmware)
• Performing actuator tests
• Performing basic settings

• Measurement / DTC labels or descriptions

Download the latest release (.zip) and add it to your Arduino IDE.

Read the documentation on the wiki! Chapter 3 describes using the demo sketches.

Thanks go out to these people for their efforts:

• Blafusel.de, for the best documentation available for the protocol
• Alexander Grau, for the base code
• Mike Naberezny, for more insight about the commands and parameters

For any inquiries, you can contact me at [email protected].