Windaq is a data logging and data graphing software. You can hook up 8 inputs in the case of the DI-149 I'm looking at getting. It measures those voltages and displays them in a graphing software. Kind of like an oscilloscope... an 8 channel oscilloscope. The hardware input of the DI-149 interfaces with their software through serial data to display it on a laptop running the Windaq software.
if the Arduino can do that all itself I was unaware of that. Figured it might be nice to let the DI-149 do some of the work since it has build in voltage regulator and over voltage protection (useful for my automotive uses) so that I don't have to look into buck converters, voltage regulators, and voltage dividers. The DI-149 is a nice intermediary for that. Since it has it's own software too I figured why try to re-invent the wheel, why not try to capture that data and display it on a TFT mounted on the dash (eventually).
This is for OBD-I owners that don't have access to a CAN network, it wasn't even invented yet. This will effectively provide any pre-1996 vehicle with a cheap and easy method to pull important real-time data from their cars. It's something that all OBD-II owners have always had. There is a HUGE market for this. Imagine any OBD-I owner being able to bring their car into the future and give it OBD-II style capability no matter the car make or model. I think that's something the world sorely needs especially mechanics, technicians, shop owners... they would LOVE something like this not to mention the DIY car owners.
Yes anyone can just run and install the DI-149 and accompanying software to achieve the same thing. Trying to get it passed through the Arduino and onto a TFT display is what will make it a complete product and could spawn a revolution for OBD-I owners. OBD-I enthusiasts would be knocking each other over to purchase a kit especially when all of the parts are currently available for under $100. I know they would. I'm talking about every single car EVER made prior to 1996. There's millions of them still on the road.
This is my Arduino dream. I'm jut a beginner. It's the reason I bought an Arduino. I'll need some help and I'm willing to learn.