Nicholas McClanahan over at GadgetGangster has written an article about their new project known as Car Kracker. It’s an automobile data bus interface based on the Parallax Propeller which interfaces with the data bus connector on select BWM, Mini and Land Rover models. It allows you to access, add and upgrade features such as add an Aux-In or music jukebox, remap steering wheel buttons, remove the Nav warning screen and display text like emails and SMS on your Sat Nav, radio, or dashboard. You can also acccess performance data and sensor readings.
The circuit couldn’t be simpler: a transistor, diode, six resistors and a micro SD card slot mounted on a Propeller shield. You can download the Propeller code here. Background on the project’s development can be found here. For those intereted in a kit, GadgetGangster has one available.
The project was also discussed on this edition of The Prototypers audio podcast.