Question about OBDII bluetooth

Developer topics relating to software that logs data from ECUs

Moderator: Freon

Postby Skidd » Thu Feb 08, 2007 11:41 am

As for the Bluetooth to Serial thing.. I'm plannin' to give it a try.

CarOBD -> ELM323 -> SerialBTAdapter -> BTonLaptop -> JDash.

I'll let you know how I make out. Once I find the BlueTooth serial adapter I want to try.

I'm thinking about trying this one ... I-SD100-00
because it appears it can be powerd through pin9 on the DB9 port. Now I need to find out if pin9 on the ELM323 has power comming out of it?
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Location: San Antonio, TX, USA

Postby javasti » Thu Feb 08, 2007 1:47 pm

I was considering using a RS232->Bluetooth unit that uses an external power supply. I have a power inverter in the car to plug the adapter into. Haven't looked into a OBDII powered one... Hopefully you will have some good results... best of luck!
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Joined: Sat Apr 15, 2006 4:22 pm

OBD Bluetooth SSM

Postby ecudev » Mon Aug 06, 2007 3:50 am


ELM won't work with SSM as it is hardcoded to 9600/10400 baud for ECU access and SSM requires 4800.

The other option is to use a Bluetooth module with a 4800 UART and interface that to the ECU via level shifters (the usual ISO 9141 interface will work).

I have developed a Bluetooth and USB interface for OBD-II called OBDKey.

Let me know if you need any more info.
Last edited by ecudev on Fri Sep 05, 2008 12:25 am, edited 1 time in total.
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Postby NSFW » Wed Aug 08, 2007 10:58 pm

What would you need to finish your SSM support? I have a Subaru and would enjoy a bluetooth ODBII interface for logging. I'm in the US, which still puts me on the wrong continent from you, but you might try posting on and/or if you want to find a Subaru closer to home.
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Joined: Sat Dec 02, 2006 4:15 pm

Postby ecudev » Thu Aug 09, 2007 12:08 am

Thanks for the reply and for the links.
I'll follow those up.
The data layer is now done. Next i will look at the Windows / Windows Mobile applications ....
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