1University of Idaho ECE 504R

Brent Chroninger and Tom Wood

Bully Dog Technologies

American Falls, Idaho

Automotive WiFi Controller

Spring 2011

2University of Idaho ECE 504R

Project OverviewHardwareSoftwareSetupDemonstrationConclusions

Introduction

Spring 2011

3University of Idaho ECE 504R

Establish the ability to communicate wirelessly to an automobile via the OBD2 port.

Transmit CAN protocol commands from PC to vehicle via wireless connection.

Receive CAN protocol commands on a PC from a vehicle via wireless connection.

Control engine RPM remotely using CAN commands through OBD2

Project Overview

Spring 2011

4University of Idaho ECE 504R

OBDII – On board diagnostics, since 1996 required on all vehicles sold in US.

Project Overview – OBDII

1. Manufacturer discretion. GM: J2411 GMLAN/SWC/Single-Wire CAN.

9. -

2. Bus positive Line of SAE-J1850 PWM and SAE-1850 VPW

10. Bus negative Line of SAE-J1850 PWM only (not SAE-1850 VPW)

3. Ford DCL(+) Argentina, Brazil (pre OBD-II) 1997-2000, USA, Europe, etc. Chrysler CCD Bus(+)

11. Ford DCL(-) Argentina, Brazil (pre OBD-II) 1997-2000, USA, Europe, etc. Chrysler CCD Bus(-)

4. Chassis ground 12. -

5. Signal ground 13. -

6. CAN high (ISO 15765-4 and SAE-J2284) 14. CAN low (ISO 15765-4 and SAE-J2284)

7. K line of ISO 9141-2 and ISO 14230-4 15. L line of ISO 9141-2 and ISO 14230-4

8. - 16. Battery voltage

Source: <http://en.wikipedia.org/wiki/Obd2#OBD-II_Diagnostic_connector>

Source: <http://en.wikipedia.org/wiki/Obd2#OBD-II_Diagnostic_connector>Spring 2011

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Project Overview – CAN

CAN – Controller

Area Network

ISO 15765

NRZ Non Return

to Zero

500 Kbits/second

Source: < http://marco.guardigli.it/2010/10/hacking-your-car.html >

Spring 2011

6University of Idaho ECE 504R

Bully Dog Triple Dog – CAN Transceiver on DSPIC 30F6011USB through FTDI USB transceiver

FirmwareMicrochip C30USB communications to PCCAN protocol handling

Two PC’s with WiFi connection One PC must have USB connection to connect

to triple dog hardware.

Hardware

Spring 2011

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C# development using Visual Studio 2008Develop PC to USB communicationsDevelop PC to PC wireless communicationsPacket Format – USB to PC and PC to PC

packets the same.

Software

Spring 2011

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Software – Packet Format

Spring 2011

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1. Install SnoopDog on two separate Wifi enabled PC’s

2. Connect Triple Dog to PC 1 via USB3. Connect Triple Dog to OBD II port on any

CAN vehicle4. Establish Client Server connection with PC

1 to PC 2 via WiFi

Setup

Spring 2011

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CAN transmissionCAN receptionCommand Execution

Demonstration

Spring 2011

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Demonstration

Spring 2011

http://www.youtube.com/watch?v=3LhepM2-pZY

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Demonstratrion – Server Setup PC1 (server)

Spring 2011

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Demonstration – Client Setup PC2 (client)

Spring 2011

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Demonstration – USB Connect PC1

Spring 2011

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Demonstration – Message Setup PC2 (client)

Spring 2011

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Demonstration – Message Setup PC2 (client)

Spring 2011

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Demonstration – Message Display PC2 (client)

Spring 2011

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Passively monitor CAN bus via WiFi connection.

Transmit CAN messages remotely.Server can eventually be put on a WiFi

enabled embedded device.Scripts can be implemented to integrate a

series of CAN bus transactions.

Conclusions

Spring 2011