OBDII Bluetooth Dongle
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
Off Line Logging
Bluetooth
ISO 15765(CAN)
J1850
ISO 9141
J1939
J1708 / J1587
USB Device
access
Application
• Torque
• Proprietary
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Hardware Architecture
OBD-II CONNECTOR
DC/DC
Regulators
Buzzer
SD
Card
USB
port
Accelero
-meter
LED’s
RTC
OBD II
Transceiver
OBD to UART
STN1110
Microcontroller
TIVA TM4C1290
Classic/Smart
Bluetooth
module
Hardware Block Diagram
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Software Architecture
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Feature set
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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
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Thank You!
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