Skoda (VW?) CPO system control via the multifunction steering wheel

USB CAN adapter connected to the Comfort CAN system in a Škoda Octavia II (which shares many systems with the Volkswagen Golf V) - User experience report.

After several attempts, I tapped into the CAN bus signal at the CAN line of the climate control unit. This involves using the two wires: orange/brown for CANL and orange/green for CANH.

The attempt to read the CAN bus signal at the OBD diagnostic connector, on a wiring harness in the fuse box area, and at the infotainment CAN within the radio compartment yielded no results.

The bitrate has been set to 100 kbps.

Since the data from the steering wheel remote control is crucial for my project, I have limited my use of can tool to extracting this specific data.

This refers to ID 5C1 with the following values:

Bit value / Value (hexadecimal) / Byte value (decimal) / Integer value.
Vol+= h04 h02/ 06/ 6/ 1536
Vol-= h04 h02 h01/ 07/ 7/ 1792
ffw= h02/ 02/ 2/ 512
bw = h02 h01/ 03/ 3/ 768
mute= h20 h08 h02 h01 / 2b / 43 / 11008
Light = h40 h10 / 50 / 80 / 20480
next= h04/ 04/ 4/ 1024
prev= h04 h01/ 05/ 7/ 5/ 1280

The keys are intended to be used within cpos to control the following functions:

In the main menu and media player.
Vol+ Vol+
Vol- Vol-
Search running / Searching...
ListView updating.
Search backward / Scroll down list view.
mute: Pause
Steering wheel illumination: Play the song corresponding to the current list view position.
next next
prev prev

In the radio menu.
Vol+ Vol+
Vol-
Vol-
Search in progress...
Search backward.
mute mute
Steering wheel illumination -
next station
previous station

In the DVD menu.
Vol+ Vol+
Vol- Vol-
Search mode on DVD menu up
Search backward / Return to previous track
DVD menu down
mute: Pause
Steering wheel illumination | Select DVD menu.
next chapter
previous chapter

Here's my problem:

'Can anyone provide me with a template or example of the step-by-step sequence or 'programming' required to use, for example, the Vol+ values to control volume within cpos? Also, what .ini files, etc., are necessary for this?'

I hope that a step-by-step guide with an example will help me implement the remaining commands.

I also need help with assigning different functions depending on the currently selected menu item.


I would be very grateful if someone could help me with this, as it would bring me one step closer to my goal of creating a perfect multimedia system using a car PC.

Matthias.