Audi CAN-Bus: Problems and Solutions

Hallo!
ich möchte eine PTT Taste für SDS haben, aber ich habe kein Multifunktionslenkrad.
eIt is probably possible to send a message to the infotainment CAN bus using the PIC18F258 and the MCP2551 CAN driver.
The question is, what should that message look like?

In the topic 'Audi RNS-E CAN Decoding,' I found the following:
5C3 2 3C 2A Phone button pressed
5C3 2 3C 00 Phone button released, changes to 39 00 after about a second.

What is the 'Phone' button? Does it have the same message as the PTT button?

And what exactly, and with what interval, should I send?
Would this work:
5C3 2 39 00 'xpause' 5C3 2 3C 2A 'xpause' 5C3 2 3C 2A 'xpause' 5C3 2 3C 00 'xpause' 5C3 2 39 00 'xpause' 5C3 2 39 00?

Thank you.
Best regards, AlexThe question is just what it should look like.

I found the following in the topic 'Audi RNS-E CAN Decoding':
5C3 2 3C 2A Phone button pressed
5C3 2 3C 00 Phone button released, changes to 39 00 after about a second

What is the 'Phone' button? Does it send the same message as the PTT button?

And exactly what, and with what spacing, do I need to send?
Would this work:

5C3 2 39 00 'xpause' 5C3 2 3C 2A 'xpause' 5C3 2 3C 2A 'xpause' 5C3 2 3C 00 'xpause' 5C3 2 39 00 'xpause' 5C3 2 39 00?

Thank you.
Best regards, AleI found the following in the topic 'Audi RNS-E CAN bus decoding':5C3 2 3C 2A Phone button pressed. 'Would this work?'Best regards, Alex.

Wouldn't it be possible to integrate the PTT button in a hidden location and have the button signal generated by an external button? Since the control unit with the LIN connection is already integrated into the button, you would only need to connect it to your steering column control unit, which would then transmit the PTT information via CAN.