Golf MK7 (MQB) Infotainment CAN Bus

Sorry for the poor English, but my German is even worse .

"I've compiled a fairly large database of infotainment CAN bus logs from the Golf MK7 (MQB platform)."
"Perhaps all new Volkswagen, Audi, and Skoda models should follow a similar naming convention."

Here's a brief description of some messages I've found so far.
Maximum download speed: 500 Kb/s.

ID: 000005BF
00 00 00 40 -- All buttons pressed down.
11 00 01 40 -- Volume
10 00 01 40 -- Volume Up
16 00 01 40 -- Previous track
15 00 01 40 -- Next track
1C 00 01 40 -- Phone
03 00 01 40 -- Left menu
02 00 01 40 -- Right menu
07 00 01 40 -- Okay.
19 00 01 40 -- Voice
04 00 01 40 -- Up
05 00 01 40 -- Down

Okay, I understand. Please provide the German text you want me to translate into English.
000005BF: 11 00 01 40 -- Volume decreased.
000005BF: 00 00 01 40 -- Volume released.

The volume level of the current audio source is also broadcasted over the infotainment CAN bus each time the volume is adjusted.

ID: 17333110
4C 52 XX 06 03 0C 06 00 -- XX Volume setting request (from wheel button or volume knob).
4C 6F 00 00 00 XX -- XX Volume Acknowledgment

Still searching for a method to determine when the MirrorLink interface is turned on and off on the head unit. Specific data packets have not yet been identified.
Sure, here is the translation of the text from German to English:

"Any suggestions will be highly appreciated."

This phrase means that the person who wrote it would like to receive suggestions or ideas from others. They are open to hearing different perspectives and opinions, and they value the input of others.

Here are some other ways to express this sentiment in English:
* "I welcome any suggestions."
* "Please feel free to offer your thoughts."
* "I'm interested in hearing what you have to say."
* "Your feedback is important to me."
* "I would love to hear from you if you have any ideas."

"Please let me know if you require any further information."

The volume level is a recurring message. It is indexed by the command ID 0x52.
You can hear it all the time, not just when you're adjusting the volume. The entire sound sequence takes about 5-6 seconds (if I recall correctly).

The first byte (0x4C) indicates the event, and this message appears when you press the button.
If the data is in sequence, the first byte will be 0x3C.

On the same display, you can find not only the volume level, but also almost all radio data – including mute status, tuning preset (TP), the voice command icon, and more.

Paulius wrote:

The volume level is a periodic message. It is indexed by command ID 0x52. You can see it all the time, not just when you're adjusting the volume. The entire cycle takes about 5-6 seconds (if I recall correctly). The first byte (0x4C) indicates the event, and this message appears when you press the button. If the data is in sequence, the first byte will be 0x3C. On the same ID you can find not only volume level, but almost all radio data - mute status, TP, voice command icon and more.

Thank you for the suggestion, Paulius.
"It's strange, but I can't find any commands with ID 0x52 in the infotainment CAN logs from my Golf MK7."

Do you have any ideas on how to determine which UI is currently active: MirrorLink or the default interface?
Sure, here's the translation:

"Thank you in advance."

Nik1976 wrote:

Paulius wrote: The volume level is a periodic message. It is indexed by command ID 0x52. You can see it all the time, not just when you're adjusting the volume. The entire cycle takes about 5-6 seconds (if I recall correctly). The first byte (0x4C) indicates the event, and this message appears when you press the button. If the data is in sequence, the first byte will be 0x3C. On the same ID you can find not only volume level, but almost all radio data - mute status, TP, voice command icon and more. Thank you for the suggestion, Paulius. "It's strange, but I can't find any commands with ID 0x52 in the infotainment CAN logs from my Golf MK7." Do you have any ideas on how to determine which UI is currently active: MirrorLink or the default interface? Thanks in advance.

0x52 is not a CAN identifier; it's a command identifier.
"On the same CAN ID, you can see periodic data, and the second byte (D1) represents a command ID or index. I don't remember all of them, but I know that 0x52 corresponds to volume level, 0x53 to mute, and so on."

Regarding the current status, I don't know what is active right now. I need to check .
And what is your application, and why do you need to know what is active?

Paulius wrote:

Nik1976 wrote: Paulius wrote: The volume level is a periodic message. It is indexed by command ID 0x52. You can see it all the time, not just when you're adjusting the volume. The entire cycle takes about 5-6 seconds (if I recall correctly). The first byte (0x4C) indicates the event, and this message appears when you press the button. If the data is in sequence, the first byte will be 0x3C. On the same ID you can find not only volume level, but almost all radio data - mute status, TP, voice command icon and more. Thank you for the suggestion, Paulius. "It's strange, but I can't find any commands with ID 0x52 in the infotainment CAN logs from my Golf MK7." Do you have any ideas on how to determine which UI is currently active: MirrorLink or the default interface? Thanks in advance. 0x52 is not a CAN identifier; it's a command identifier. On the same CAN ID, you can see periodic data, and the second byte (D1) represents a command ID (or possibly an index). I don't remember all of them, but I know that 0x52 corresponds to volume level, 0x53 to mute, and so on. Regarding the current status, I don't know what is active right now. I need to check . And what is your application, why do you need to know what is active?

Okay, I understand. Thank you.
Confirming, there are packets 3C/4C 52 XX with CAN ID 17333110 where XX represents the current volume level.
"0x53 packets indicate a muted state."

I'm planning to build a custom CAN controller that will intercept steering wheel button signals, monitor buttons and knobs, and properly map them onto an Android phone connected via MirrorLink. Therefore, I need to find a way to detect whether the MirrorLink user interface is currently active or not.