If all you need is to send the T15 ON message to your seats, you don't need to install a gateway. The arduino board with a Canbus interface will do the job right?
Thank you for mixing in, I was hoping you'd blend in to the discussion.
Yes, probably, if it is able to send it on the comfort canbus. Then the arduino board itself should be sufficient.
No need for a gateway in such case.
miichel: I'm more than happy to accept the payment that you would have made for the "Arduino option" - but using my fix instead !!! Only kidding, of course - I only require your undying gratitude which is worth much more than money to me!
On a serious note and without intending any offense - are you sure about your facts? I ask because your "interracial" project doesn't appear to align with my data.
I'm happy to be corrected by more informed colleagues - but looking at the CAN network arrangement for vehicles like the Golf mk7 (i.e. 517), I can't find any mention of the massage control unit - J740 participating on any CAN bus (including the Convenience CAN - which I assume is the equivelent to the Polo "Comfort CAN" )
I've also looked at a couple of WDs (VW and Audi) and I can find no J740 connections to the CAN network - this has been confirmed by the pin-out designation list for J740 on the WDs
Finally, to satisfy my confusion - I've just confirmed that the seat massage function on my Audi A3 8V ( platorm build) does indeed work with the ignition-OFF (i.e. sans CAN wake-up signal).
So, unless I'm missing the bleeding-obvious (not unlikely) - I reckon the answer to your Arduino option is to not use an Arduino!!
Don
EDIT: oops
@Ronaldo - you posted first
Hi Don, it's always a pleasure to read your posts.
And yes you are completely right about the J740 being a dumb module. With no canbus and massage function.
The seats I laid my eye on, proverbially speaking, however are different.
There are, roughly speaking, two kinds of electrically adjustable seats.
You have the J740 version you're talking about, with adjustable backrest and massage function: 3AA959257
And there is the J810 memory version with everything adjustable. 3AA959760A
There is absolutely zero need for such a memory seat in my humble Polo. But I do want it.
Not because of the memory function but I want them to adjust electrically in all ways.
I am uncertain about the exact details of your Audi A3.
If it offers the memory seats, I'm completely satisfied I don't need the arduino.
If your Audi does offer the memory seats, you should have a canbus connection:
Let me know what you think
For Testbench you could use a Raspberry Pi and my Python Script to send Terminal 15 status is on.
Tools for working with VW PQ25 Plattform Vehicles. Contribute to dnoermann/car-tools development by creating an account on GitHub.
github.com
Or any other simple thing that is able to send can Messages.
Have a look at the code for option "-MQB_Klemme_15_On" in my Script.
Thanks. I am well aware of many possibilities regarding the arduino and rPi like solutions
The problem is, I don't know too much about these things so I'd rather spend some money and ask somebody to do it for me.
That way I'm sure at least that parts works, and if it fails, it's due to something else I do understand. Like vehicle electrics