1. OBDII Bluetooth Dongle

2. OBDII-BT Dongle - System Diagram
Targeted to extract ECM network data from OBD-II port of vehicles and transmit it over Bluetooth to Mobiles/Tablets.
The OBD-II application software installed on the Mobile/Tablet can process the data and make it available to the end user.
OBD II BT Dongle
Vehicle Data
Bluetooth
ISO 15765(CAN)
J1850
ISO 9141
J1939
J1708 / J1587
Application
Torque
Proprietary
USB Device access
Off Line Logging

3. Hardware Architecture
Hardware Block Diagram
OBD-II CONNECTOR
OBD II
DC/DC Regulators
Transceiver
Classic/Smart Bluetooth module
Microcontroller TIVA TM4C1290
SD Card
USB port
Accelero -meter
OBD to UART STN1110
Buzzer
LED’s
RTC

4. Software Architecture

5. Feature set CAN protocols supported ISO 15765 J1850 ISO 9141 J1939
J1708 / J1587
Critical PID monitoring
Boost, Fuel pressure, ECT, EGT, RPM, Throttle, Calibrated values
Logging of requested PIDs based on scheduled interval (in SD card) and transfer via blue tooth based on paired device availability
Clearing of the Diagnostic trouble codes on restart and start scanning for the same on periodic basis, buzzer alerts and led indication if any raised DTC
Offline Data logging with Time Stamp (based calendar information)  
Configuring and monitoring of threshold values for the PID and buzzer alerts or LED indication
Support for Standard applications like Torque along with proprietary applications
Power Saving mode
Firmware upgrade through SD card
External interface support for SD card
USB device functionality for data retrieval

6. Thank You!