Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

Magister · 06-10-2008, 10:36 AM

I doubt you need an ELM323, on AVRFreaks a couple of people did it without an ELM. Search "obd" on their forums, some people even give some C codes to do it. It seems the ELM is slow too.

I'm sure we can drop the ELM.

To init the OBDII you send 0x33 at 5 bauds then you switch to 10400 bauds and send some commands, plug the Atmel directly on the OBDII like this:
(ISO protocol only)

You could also switch to an AT90CAN128 to speak CAN to your car I guess?

06-10-2008, 10:36 AM	#5 (permalink)
Magister OBDuino coder Join Date: Jun 2008 Location: Montréal, QC Posts: 212 Titine - '13 Hyundai Sonata Hybrid Thanks: 3 Thanked 10 Times in 8 Posts	I doubt you need an ELM323, on AVRFreaks a couple of people did it without an ELM. Search "obd" on their forums, some people even give some C codes to do it. It seems the ELM is slow too. I'm sure we can drop the ELM. To init the OBDII you send 0x33 at 5 bauds then you switch to 10400 bauds and send some commands, plug the Atmel directly on the OBDII like this: (ISO protocol only) You could also switch to an AT90CAN128 to speak CAN to your car I guess? __________________ 2013 Hyundai Sonata Hybrid Last edited by Magister; 06-10-2008 at 10:48 AM..