Tag Archives: ELM327

Open-source OBD adapter

AllPro

Alex @ obddiag.net has published a new open source OBD adapter which provides you a serial interface using the ELM327 command set and supports all OBD-II standards.

The adapter kit schematic is shown here. It is built around NXP LPC1517 Cortex-M3 microprocessor with 64 kB program memory, but can accommodate another chip from same family like LPC1549 with 256 kB if required. The NXP chips has a ROM-based bootloader that supports loading a binary image into its flash memory using USART or CAN. All the software is written in C++ for NXP LPCXpresso IDE which is essentially using GNU toolchain for ARM Cortex-M processors. However, it can be compiled with other pre-built GNU toolchain, like GCC ARM Embedded or even with Keil uVision IDE.

Open-source OBD adapter – [Link]

Vehicle OBD2 Arduino Shield with STN1110 IC

obd2shield_artistic

sigalabs.com have designed and build a great OBD2 Arduino Shield using STN110 IC :

The STN110 is a multiprotocol OBD to UART interpreter IC. It provides an easy means of accessing vehicle data, including diagnostic trouble codes, MIL status, VIN, Inspection and Maintenance (I/M) information, In-use Performance Tracking (IPT), and hundreds of real-time parameters.

It is compatible with famous ELM327 commands but introduce many new great features.

Vehicle OBD2 Arduino Shield with STN1110 IC – [Link]