Infotainment Specifications just for giggles and grins (the Tablet), way tech post...

Ah, then my apologies for misunderstanding, I assumed the PID attribution was ephemeral. If it's a static value, then doesn't that make things far easier? At least in terms of locating the data value through the head unit, that is. As for how that value can be called upon and dynamically outputted somewhere on the dash/frontend user space as a persistent metric measure/meter, that'd be outside the scope of my knowledge.

I can't be certain off the top of my head, but I've a few hunches regarding the former though, and I wouldn't mind taking a look to confirm whenever I next have the chance.

 

@Sonsonnetwork Not sure what happened to your post, but if you're looking for the method to boot the head unit into recovery then take a look here. It's not a physical bypass such as a key input combination, but it doesn't require interaction with the user space so this would be how you would fix soft-bricks. Note that this doesn't mean there isn't a bypass method using the keys — in fact, I strongly suspect that there is — but only that the method doesn't appear to be well known or publicly disseminated. In fact, I have personally confirmed that a hard key combo can be used to boot the system into safe mode, which to me is a strong indication that a combo for recovery mode should also exist.

 

So due simply to the pure enormity of the below cited XDA thread, I never came across this post until just now. For link retention, here's a copy/paste:

Credits: Toolhas4Degrees