The module provides access to the car diagnostic system OBD-II, installed in cars manufactured after 2001 in the European Union, and after 2002 in Poland. The system allows, in particular, to diagnoze trouble codes stored in memory, regarding the motor, electronic devices, etc. The system allows you to use the ELM327 command set through the serial interface.
The connection between the board and the car is via cable DB9 – 9 DLC (included). DLC is a standard diagnostic connector used in systems OBD II. The standard also defines the way of communicating with the onboard computer of the so-called ECU (Electronic Control Unit). More information can be found in the instructions.
The module output is a serial interface UART that enables communication with computer through USB - UART. On the board there is a chip STN1110, which converts the data of system OBD II to serial interface UART (RS-322). It enables the serial standard ELM327 command transmission from a PC or a running set (e.g. Arduino) to the central unit of the car.
The video made by SparkFun introduces the features of the product.
- Compatible with the ELM327 command set AT
- Compatible with the Extended ST command set
- Communication: UART (speed from 38 bps to 10 Mbps)
- Safe bootloader, a simple software update
- Supports all OBD II protocols:
- ISO 15765-4 (CAN)
- ISO 14230-4 (Keyword Protocol 2000)
- ISO 9141-2 (Asian, European, Chrysler vehicles)
- SAE J1850 VPW (GM vehicles)
- SAE J1850 PWM (Ford vehicles)
- Protocol support OBD:
- ISO 15765
- ISO 11898 (raw CAN)
- Support for SAE J1939 OBD Protocol
- Automatic detection of the Protocol
- A large memory buffer
- Voltage input for monitoring the battery status