Develop CAN Gateway: Guide & Tutorial

Hello everyone,

I've read a lot about adapters that allow you to install radios with CAN bus functionality in vehicles that don't have a CAN bus, and vice versa.
I would like to install an RNS-E system in my Altea and now need a CAN adapter that converts from Seat CAN to Audi CAN. Do you think you can help me with that?

Bertram.

The only problem is likely to be figuring out exactly what messages the Seat's CAN bus is sending. I have an adapter here that, for example, filters and modifies messages from the ignition system and passes them on. A similar adapter could also translate messages from a different CAN bus into the Audi's CAN bus.

Have you ever tried installing the radio and connecting it to the CAN bus? What kind of CAN bus is it in that Seat anyway (what's the baud rate, that's the first question)? If it's also 100 kbps, then at least the physical layer is compatible.

If you have a CANUSB adapter, you need to find out which messages the Seat sends for ignition, lights (possibly dimmed), and speed (only if the Gala feature is important). On the Audi side, message '07' on ID 271 tells the radio that the ignition is on. Message '11' indicates that the ignition key is inserted, and '10' indicates that the key is not inserted. Instrument illumination is transmitted in ID 635. The first byte represents the intensity as a percentage; a value of 0 means 100% dimmed (off).

Once you have the translation table, programming an adapter should no longer be a problem.

Ist hier schon jemand weiter gekommen?

Best regards, Niko.

Hi.
If you have a little bit of experience, you can actually build it yourself quite easily.

As mentioned before... the IDs are important. However, most of them should already be available in various forums.
I also have an Altea myself, but I don't have the time to log any data right now.

You'll definitely find information online about the signals (IDs) that the RNS-E system requires.

I'm curious to see if anything happens. Maybe you could start gathering some IDs, and then we can definitely do something together .

Best regards, Patrick.

Hi,

You're very welcome.

I'm not sure how to proceed, what kind of module I should buy, etc. I was just about to get this one:

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The base is a...

A6, 4.2-liter automatic transmission, fully equipped except for: air suspension, Bluetooth, and CD changer.

Als BT-FSE habe ich mir gedacht ne FISCON.

Here's the CAN code link:
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Greetings.

And here's the code link in our forum:

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=11&t=987&p=2724&hilit=RNS#p2724</a><!-- l -->

Have you ever seen the Ixxat price list? I don't know what you're planning to spend on it. But I'm guessing you won't be able to get IXXAT modules for less than €300-€500.

Rangehen sollst du volgendermaßen.
Search the internet for identifiers related to Audi and Seat.
Then, compare them to see which ones are the same. Or which ones need to be changed.

Next, determine the speed (as AudiA4B6US mentioned).

I would investigate the modules and other details later. Because then you'll know if you only need to change the baud rates, identifiers, or even the data within the identifiers.

I'm happy to help you with this as well (as much as I can). Just let me know if anything needs to be programmed or not.

Best regards,
PatrickThen compare them and see which ones are the same. Or, which ones need to be changed.Then, figure out the speed (as AudiA4B6US mentioned).I'd be happy to help you further (as much as I can). Just let me know if the question involves programming or not.

Best regards,
PaI'd be happy to help you with that as well (to the best of my ability). Just let me know if something needs to be programmed or not.Best regards, Patrick.

Hi,

Unfortunately, I haven't been able to find any identifiers yet. I need the identifiers for the A6 4B and for the RNS-510 from VW.

What exactly do identifiers do? And where can I find them? Or is there a forum or community dedicated to discussing identifiers?

Best regards, Niko.

Hi.

Okay, you want to build or buy something. The problem with building is: 'It seems you don't have any idea how the CAN bus works.' You should start by learning about that. Otherwise, you're in the right place in this forum.

Identifiers are numbers/signals that are sent and received (e.g., 4f4, 245, 2ac...).
Da brauchst du die von dem Auto, wo das Navi drinn ist (oder die halt das Navi braucht, das muß nicht autoabhängig sein) und die die dein Auto (wo es rein soll) an das Navi schickt.

The question is also, what you're willing to spend. So, what's your budget?
Best,
Patrick.The question is also, what you're willing to spend. In other words, what your budget is.Sure, here is the translation of the text from German to English:

'LG' is an abbreviation for 'Liebe Grüße,' which means 'Best regards' or 'Best wishes' in English.

If you're still interested, feel free to ask the guys.

http://www.canshack.de

They specialize in VW TP 1.6/2.0 and BAP/DDP systems, and just a few weeks ago, they even managed to get an RNS 510 with full functionality working in a 3-series BMW (or was it a 5-series?).

If you want to install an RNS 510 in your Altea, the connection should be almost seamless...

I could find the Audi identifiers.
I'm also currently building a CAN gateway (connecting a Ford vehicle to a CAN gateway and then to a Chrysler navigation system).
Since I don't want to transmit data from the radio directly into the vehicle, I can use my old analog-to-CAN converter. This converter has 2 CAN transceivers. If you connect one to the TX (transmit) pin and the other to the RX (receive) pin, it should work (provided that the baud rate of the vehicle's CAN bus is the same as the baud rate of the radio).
Could you please find out the baud rate (especially for VW; I can look up Audi)?
If there is interest, I can provide a PCB for an AT89C51CC01 microcontroller for a small fee. Compilers and development environments are available for free online.