My Dreamforce session on DIY Telematics for OBD-II with a Raspberry Pi. What if your car was connected to the Cloud, and had been logging sensor data for the past 30 days? What if it could automatically file a Case with your local dealership with the Diagnostic Trouble Codes from your car and all that log data attached? What if the Service department could give you a call to schedule an appointment to get it fixed, so you don’t even have to remember to call them? Since they have all the automotive log information they need to diagnose the problem before you even show up, they can even tell you what’s wrong over the phone and quote you an estimate for the repair. Here’s a Raspberry Pi DIY project that does just that. More info at: http://gersic.com/ive-connected-my-car-to-salesforce-com/

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

9. Sensors Galore

10. CAN Bus

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

12. Real Time Data

13. So I got to thinking…

14. ELM327

15. Arduino

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

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

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

19. Beaglebone Black

20. Raspberry Pi

21. 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)

22. Anybody remember the Hayes Modem Command
Set?

23. Commands
tgersic-ltm:dev tgersic$ screen /dev/tty.OBDII-LCASPP 115200
>ATI (Print the ID)
ELM327 v1.5
>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

24. Commands
tgersic-ltm:dev tgersic$ screen /dev/tty.OBDII-LCASPP 115200
>ATI (Print the ID)
ELM327 v1.5
>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

25. Screen Commands

26. OBD-II Logging

27. Heroku Upload Script

28. github.com/tomgersic/obd2pi -- obd.js

29. github.com/tomgersic/obd2pi -- obdsync.js

30. github.com/tomgersic/obd2server
http://[SOMEDOMAINHERE.COM]/log/{ obddata: { mode: '41', pid: '04', name:
'load_pct', value: 10.9375 },vin: 'JF1BJ673XPH968228',localdatetime: Sun Nov 10 2013
17:23:10 GMT+0000 (UTC),_id: 160 }

31. Heroku Mongo DB

32. Cases!

33. Tom Gersic
Director, Mobile Services Delivery
@tomgersic

34. @tomgersic