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Project This project describes blueOBD©- how to build a interface between an OBD-2 vehicle diagnostics bus and a mobile devices like PDA, smart phone, mobile phone using bluetooth serial port profile. Basically this tiny but innovative project is based on two main components, the protocol chip and a bluetooth module with build-in UART.
Specifications:
The chip was developed for low-cost solutions connecting to vehicle diagnostics bus. Communication is made easy as the chip translates diagnostics protocols to ASCII messages which can be received via RS-232C a fixed baud rate of 9600,8,N,1. This chip supports the most common ISO 9141-2 diagnostics protocol used by most cars build in Europe. The bluetooth module supports UART and 3.3V level which required additional level shifter to protocol chip and 3.3 V power regulator at 28mA. Module will allow any Bluetooth device to discover and connect to blueOBD©. Battery power from car is current limited with 10 Ohm, overvoltage protected with the Z-diode, filtered with capacitor and reverse voltage protected with diode before being used by 5V power regulator 78L05. Next generation of chip converting OBD-2 data into standard ACSII characters will be supported now. This chip will supports CAN (ISO 15765-5) SAE J1850 PWM, SAE 1850 VPW, ISO 9141-2 and ISO 14230-4. This latest revision of blueOBD© is as of March 2007 available. Module RevB will be shown here soon. We might make this version avaibable to you as low cost commercial design soon. Kits:
To check compatibility of blueOBD with your car check this link. Scroll down to selection list, pick your typ of car and check column OBD-2 it must list "ISO", e.g. AUDI A4 build year 2000 is "ISO". There will be NO guarantee on listed information.
Documents and software: blueOBD schematic - will be available soon OBD Gauge for Pocket PC - here last update: Friday, 12 March, 2007 |
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