Dude, huge thanks for sharing your progress with us!

Thank you very much for sharing the code and the diagram!

Did it, and it works like a charm in combination with a JVC KD-X351BT.

I tested it today with a blue pill, because i didn't have an arduino board on my hands and worked flawlessly. Thank you very much!!!

Dear Bart Kuijper,

Your work is amazing, i really apprrciate it. I'm gonna try it on a pioneer radio and upload some edited codes if needed. Thanks for sharing king.

Confirmed to work with Arduino Nano V3.0 + JVC KD-X241, resistor 390 ohm instead of 1 k ohm in the schematic in the link attached. Not tested with 1 k ohm. Just one problem encountered: when keeping pressed "Volume UP" stops at "Volume 15", after that level grow with one unit at each "Volume UP" key press. Do you encountered the same problem? Thank you very much, Bart! Good job!

Hi! Very nice job! Where did you find jvc headunit's protocol? I cant find anywhere. Thanks. Bye.

Hi Bart! Thank you for this tutorial. I wanted to ask you but with this adapter you can keep the writings on the odometer of the car? Type name radio station volume etc? Thank you.

I can't read the Part Numbers on ur schematics. What kind of Optocoupler are you using?

Ik heb een renault megane uit 2002 en een jvc kd-x252 hoe kan ik het stuurwiel hierop aansluiten ik heb nog nooit met codering of arduino gewerkt dus zou ook niet weten hoe het moet

First where i can find this controller and how do you do that

This process work with Arduino Uno R3 and Pionneer Radio?

I'd also appreciate if you could show us the cicuitry more detailed :)

Hello! Can you help me do this with Renault Megane 2/Sony G1101U head unit? If you helo me I can pay for schematic. Thanks!

Hi there! I want to adapt the code to another car. How do I find out which way the car sends commands?

Hi! How do you connect optocoupler? Can you draw a schema?

Kun je dit maken voor een Pioneer?