Open-source ELM327 OBD adapter

The adapter allows you to interface with your car's OBD-II bus using the ELM327 command set

The NXP LPC1517 Cortex-M3 chip with 64 kB program memory is the core of the adapter, but it can accommodate another chip from same family like LPC1549 with 256 kB if required.

The Highlights

NXP LPC1517JDB48 ARM Cortex M3 72Mhz processor
64kB Flash, 12kB RAM
Using NXP sophisticated State Configurable Timers to do the precise signal handling for J1850 PWM/VPW protocols
CAN FIFO buffers for handling some not-strict ISO-compliant ECUs
Botloader for initial firmware programming
Low power consumption

The source code is now on GitHub source code repository and the full project page is here.