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Topic: OBD II - ELM327 - sending non-sence  (Read 477 times) previous topic - next topic

Python-p

Hi all,

I´m totaly in dead end, don´t know where is the problem...

I´m trying to use this http://www.instructables.com/id/Hack-an-ELM327-Cable-to-make-an-Arduino-OBD2-Scann/

But in RealTerm i see only some cluster of characters (in attachments)

Using TX, RX, GND soldered on chip (CH340T) in OBD adapter.

Adapter work like a charm, when I use OBD Doctor there is no problem.

pylon

Quote
I´m trying to use this http://www.instructables.com/id/Hack-an-ELM327-Cable-to-make-an-Arduino-OBD2-Scann/
That instructable uses an LCD to display the data. As you have a screen shot of a serial terminal you're using something different. Post a wiring diagram of your hardware and post the code you're using (use code tags!).

Python-p

Yep i know that. But i just looking how Uno communicate with OBD.


Because no data on LCD. Still connecting.

ELM TX -> UNO TX
ELM RX -> UNO RX
ELM GND -> UNO GND

*ELM = CH340T

pylon

Quote
ELM TX -> UNO TX
ELM RX -> UNO RX
ELM GND -> UNO GND
That means you have no sketch loaded on the UNO?

BTW, the ELM communicates with 38400 baud but your terminal program was set to 57600.

Python-p

I use same sketch like that guy on instructables.

Yep i got it now, i will try some thing tomorrow.

THX

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