Reprogramming the Radio-CanAdapter?

Hello everyone,

First, let me introduce myself:

My name is Günther, I am 43 years old, I trained as an electrician, and I work as an IT technician.
My wife and I drive Opel cars (specifically a Vectra C and a Signum). Each car has an Erisin Android radio installed, along with a CAN-Bus adapter.

Now, what bothers me about this adapter is that when using the steering wheel controls, the left rocker switch receives signals from both the onboard computer and the radio.
I want to adjust something on the onboard computer, but at the same time, the radio is changing stations or tracks.
Since the transmitters can also be switched using the buttons on the right side of the steering wheel, I would prefer that the radio didn't respond to those buttons.
Similarly, the original Opel radios had a feature that increased the volume as the vehicle's speed increased.

Therefore, my question is: Can these adapters be reprogrammed and customized?

Best regards and thank you in advance.

Günther.

Hello Günther,

The right contact person for this question would be the manufacturer of:

Quote:

Erisin Android Radio including CAN-Bus adapter

It would certainly be possible to add an additional filter to the CAN bus on the radio adapter to filter out the control lever states before they reach the adapter. That wouldn't be a very elegant solution.

Best regards, Rainer.

Thank you for the information, Rainer.

However, I doubt I will receive any (reasonable) response from the manufacturer.
"Before making the purchase, I sent three emails inquiring whether I could get the radio trim without the sharp edge, as the edge is always visible in their pictures. This design feature, where the trim has a noticeable bend, was only introduced in the Astra H, Zafira B, and newer Opel models, while in my car, the radio only has a slight curve."

The third time, I received an email from China saying, "No problem." Yes, and two radios with a crease arrived...
The complaint email was not read or answered at all.

On the adapter, I see 4 gold-plated pins that appear to allow reading and writing to the serial program. However, I don't know the specifications of the bus, and I'm also not sure which software I could use to extract the data from the chip.
If I could, I would work my way through the program, deleting query by query and reverting the changes until I found the solution.

Filtering out the relevant messages seems to be the only option, unless you can find some kind of configuration setting on the Android device to ignore the button presses.

May I ask where you're from? I've done quite a bit of research on Vectra/Signum models, especially regarding CID control and the steering wheel remote. I built and programmed something myself using an Arduino, and I was able to replace my original radio with a Nexus 7, but in a way that features like LFB, CID, FSE, etc., continue to work .

Hi, I'm from near Munich.

I'll take a look at the adapter in the next few days and see if I can identify the type of chips used. If possible, a datasheet might help determine the protocol.

Signum_V6 wrote:

Hi, I'm from near Munich. I'll take a look at the adapter

in the next few days and see if I can identify the type of chips. A datasheet might then help with understanding the protocol.
Uploading a picture of the adapter's internal components here might also be a good idea.

Okay, here are the photos.

Thank you. It doesn't look like the manufacturer designed it in a way that allows for software updates by customers.

Perhaps not for the customer, but when I look at these 4 unlabeled pins on the back and the corresponding labeling (RST - GND - SWIM - 5V).
Then I assume this refers to the serial interface of the STM8S208.

Apparently, you also need an adapter for this, as well as software to read the data.

I can't find anything about a software anywhere.

I can build a freely programmable gateway... including a tool to define the rules by which messages are processed.

Best regards, Rainer.

That would certainly be an alternative.

What would that look like?

Remove the current interface and replace it with yours -> Will you be happy?

How do I get the correct, necessary CAN commands into the device, specifically only the ones I need to control the radio?

And finally, what is the total cost? I personally need 2-3 of these modules.

To remove the existing adapter, you would first need to know exactly what it does.

The price of the solution depends on its complexity, the effort involved, the level of comfort it provides, and the production volume, while the cost of individual components plays a relatively minor role.

If someone spends 3 months programming a comfortable configuration software, it will become very expensive with a production quantity of only 2-3.

Best regards, Rainer.