VAG Blocks is open source (GPLv3) beta software for reading VAG group specific measuring blocks from an OBD-II port using an inexpensive ELM327 type adapter. Both Bluetooth and USB adapters have been tested on Windows & Linux. Sample rates of up to 12 samples per second have been achieved.
Various control modules are supported such as the engine ECU and gearbox. Values such as boost, oil temperature, DPF soot loading and current gear can be plotted in program and logged to a CSV file.