Thread: ELM329 custom USB interface

Originally Posted by reinoso

I had not planned to sell this board, but if many people is interested, I'd consider to make a few.

Well, today I spent a few hours doing some sniffing. I identified the code for activating ligths, wipers, etc.

I forwarded the data packet and all work OK, but only for a while (ie. wipers are activated only for a second). It is normal because the original ECU is also sending the "OFF" packet periodically.

My question is, if I want to make my own circuit to turn the lights on without using the original button, Do I have to always be sending the "ON" packet faster than original ECU? I don't like this "bus fight", is there any way to avoid this situation?

Thanks

Hi reinoso

What software did you use to sniff thw canbus ? I would like to try doing simular myself just to see whats going on.

thanks

Sneak peek: STN1170 datasheet.

Originally Posted by Vitaliy

Sneak peek: STN1170 datasheet.

At 10.99 US$ a piece this is extremely good deal.
Wondering if other vendors will come up with something similar to OBDLink MX but with more affordable price tag.

Originally Posted by marlasr

At 10.99 US$ a piece this is extremely good deal.
Wondering if other vendors will come up with something similar to OBDLink MX but with more affordable price tag.

We would welcome it.

Vitaliy

Originally Posted by Vitaliy

We would welcome it.

Vitaliy

Competition makes scantool.net innovate to create even more awesome hardware, can't wait to see what they come up with next.

Yes I would like to know how you are looking as well? Or are you just looking at what comes across, pushing a button and see what happens?


I would like to communicate with my truck and play with some things.

In my case I intend to remove some of the controls in my truck and replace them with controls from an ARM based computer hidden in my dash connected to a touch screen. This also allows controls to be done easily for security as well.

I have a 2003 GM truck I want to play with...

I also have a laptop I will use to chat with it until I have this itty bitty computer running with it.

(Using a Freescale i.MX53 QSB as a development system. This is a 1ghz ARM system that runs WinCE7, Android, or Linux. May move to a quad 1.2ghz i.MX6 once I have some of this figured out but heck, $150 for a full blown computer I can't beat for "playing around with".)

Originally Posted by redheadedrod

Yes I would like to know how you are looking as well? Or are you just looking at what comes across, pushing a button and see what happens?


I would like to communicate with my truck and play with some things.

In my case I intend to remove some of the controls in my truck and replace them with controls from an ARM based computer hidden in my dash connected to a touch screen. This also allows controls to be done easily for security as well.

I have a 2003 GM truck I want to play with...

I also have a laptop I will use to chat with it until I have this itty bitty computer running with it.

(Using a Freescale i.MX53 QSB as a development system. This is a 1ghz ARM system that runs WinCE7, Android, or Linux. May move to a quad 1.2ghz i.MX6 once I have some of this figured out but heck, $150 for a full blown computer I can't beat for "playing around with".)

The GM truck is likely using VPW for control, so any OBDLink or STN11xx would work with it. In other words, it doesn't have to be MX or STN1170.

Disclaimer: you're basically on your own when it comes to reverse engineering. STN11xx gets you on the bus, but it's up to you to figure out what the messages mean.

Vitaliy

Originally Posted by Vitaliy

The GM truck is likely using VPW for control, so any OBDLink or STN11xx would work with it. In other words, it doesn't have to be MX or STN1170.

Disclaimer: you're basically on your own when it comes to reverse engineering. STN11xx gets you on the bus, but it's up to you to figure out what the messages mean.

Vitaliy

Thank you, this is what I expected, when I originally started looking into this I was afraid I would have to tie directly into the High speed and Low speed buses and get into proprietary networking but it sounds like everything is accessible through the ODBII connector and so I should be able to access all of the modules that are on either of the buses?

There is information available out there for me to be able to reverse engineer most everything I need although I will hopefully be looking for someone else who has been there done that. The main thing for me at this point was to connect to it.

I have built another one:









Regards