I was laughing unitl I realized you weren't reinventing the controls, just duplicating the HMI.
If you were to duplicate the brain of the ACC unit you'd have a lot on your plate.
First and foremost, different vehicles pose a major concern:
-There are different sensors in different places among different makes, models.
-Some companies use stepper motors, servos, vacuum actuators, etc.
-Some vehicles now use pollution sensors with PWM outputs.
-Sunload sensors.
just to name a very few.
To apply heat transfer and thermodynamics to single- dual- or tri- zone closed loop control is kind of a tough problem. I won't even get into blower speed curves.
Engineering an aftermarket ACC controller that will work with, as well as without certain inputs, configurable via usb, that saves it's settings for use without a PC, and that auto calibrates itself to best approximate some of the modeling companies like Visteon can do because R&D money is abundant takes some time and head scratching.
Then to design this embedded system with good engineering principles (so that it's reliable), with a supporting line of sensors and actuators, so that those with manual HVAC don't have to use Mastero's Aircon2; well...
I'll just call it a daunting and difficult task to say the least.
So I laughed at first, because I know, and I was going to ask if you were feeling a little overwhelmed yet... Then I realized that this isn't quite what you were doing, so.. no empathetic laughter for U.
Good luck on your build.
