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Electronics | Audio | NAV | Infotainment Anything related to in-car electronics, navigation, and infotainment.

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Old 08-10-2021, 10:06 PM   #15
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This is great! I got the same controls and just double taped them to the steering wheel. Works but nothing as clean as this. Makes me want to get a 3D printer

Hope you'll upload the final model to thingsverse.

Good luck!
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Old 08-27-2021, 12:57 PM   #16
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The AliExpress SWC buttons work using a resistance ladder. Each button correlates to a particular resistance between Key1/Key2 and ground.

An Arduino was utilized to read the resistance by using a voltage divider circuit. To do the prototyping, I used an Arduino Uno.

My Kenwood head unit reads SWC commands in a NEC IR format. Luckly, there a bit of information on how this works and some existing coding on the internet. I spent about a week troubleshooting the voltage divider and NEC IR code. Also added more functions by utilizing a "press and hold" feature to each button. Once that was done, I moved everything onto a smaller Arduino nano.

Obviously have to use the 3D printer whenever I can.

Here is the completed project. It is all working great and it feels super rewarding to do something novel like this.
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