All cars manufactured since 1996 have an OBD-II diagnostic interface. Join us to learn how to expose this data using a Heroku app and Force.com APIs, explore the data available, and be introduced to DIY products like the Arduino, Raspberry Pi, and Beagle Bone. We'll finish by creating an automatic support-request and case-handling system.

1. Monitor Your Car from the Cloud
DIY Telematics and the Internet of Things
Tom Gersic, Salesforce.com
Director, Mobile Services Delivery
@tomgersic

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3. Tom Gersic
Director, Mobile Services Delivery
@tomgersic

4. “You just can’t work on cars yourself these days
because they’re all computerized.”

5. “I know more about pneumatic engine control systems
than I do about computers”

7. The MIL (Malfunction Indicator Lamp)
 a.k.a “Check Engine Light”
 2 Stages in cars since 1996 Model Year
• Steady
• Flashing

8. CAN Bus

9. OBD-II
 Required by law since 1996
 Within 2 feet of steering wheel
 16 Pin connector

10. P0171 and P0174 -- “System too Lean”
 Bad O2 sensor?
 Clogged fuel filter?
 Vacuum leak?
 Watery gas?
 Plugged injectors?
 Leak in the intake hose?

11. Real Time Data

12. So I got to thinking…

13. ELM327

14. Arduino

15. OBD-II TTL Adapter
Red: Vcc (+5V)
Green: Ground
Yellow: Rx
Blue: Tx

16. TTL UART
UART: Universal Asynchronous Receiver and Transmitter
TTL: Transistor to Transistor Logic

17. Commands
tgersic-ltm:dev tgersic$ screen /dev/tty.OBDII-LCASPP 115200
>ATI (Print the ID)
ELM327 v2.0
>ATZ (restart the device)
ok
>ATL1 (turn linefeeds on)
ok
>ATH1 (turn headers on)
ok
>ATS1 (turn spaces on)
ok
>ATSP0 (set protocol to Auto)
ok
>03 (get stored trouble codes)
87 F1 12 43 04 44 00 00 00 00 15
43 is a response for a mode 03 query

18. Commands
tgersic-ltm:dev tgersic$ screen /dev/tty.OBDII-LCASPP 115200
>ATI (Print the ID)
ELM327 v2.0
>010C (“01” is mode 01 for realtime data. “0C” is for RPM.
84 F1 12 41 0C 0A EC CA
0x0AEC is 2796 quarter RPMs, so 699 RPM (idling)
41 is a response for a mode 03 query
0C is the command it’s responding to

19. OBD-II Modes

$01. Show current data

$02. Show freeze frame data

$03. Show stored Diagnostic Trouble Codes

$04. Clear Diagnostic Trouble Codes and stored values

$05. Test results, oxygen sensor monitoring (non CAN only)

$06. Test results, other component/system monitoring (Test results, oxygen sensor monitoring for CAN
only)

$07. Show pending Diagnostic Trouble Codes (detected during current or last driving cycle)

$08. Control operation of on-board component/system

$09. Request vehicle information

$0A. Permanent DTC's (Cleared DTC's)

20. ArduinoOBD
https://github.com/stanleyhuangyc/ArduinoOBD/

21. Simple MongoDB logger in Heroku

22. Heroku to Salesforce

23. Tom Gersic
Director, Mobile Services Delivery
@tomgersic

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25. @tomgersic