I have a project to replace my car's instrument panel with a Android tablet. So I'm developing an application that communicates with an ELM327 device through bluetooth. I have managed to successfully get things like engine RPM, speed and temperature through OBD II, what I can't figure out is how to get some specific information that are shown in my original instrument panel (like the handbrake light and reverse light).
Is it possible to get this kind of information using OBD II? If yes, I assume the OBD commands are vendor specific so, anyone have an idea of where to find these codes?
My car is a GM Vectra 2007 2.0 8V. Thanks.