That sounds awesome! I need to do everything to this car, from floors to driveline. I was thinking about wiring the unlock censor on the ceiling above the drivers side door so I can just tap the roof to unlock, then tap it again on my way out to lock it. Im not worried about locking up while Im driving, I live in a pretty safe place.
Then, as far as starting and killing the engine, the engine hasn’t been installed yet (I still have aa llootttttt of shit to get done, I’m way ahead of myself here) I can start acquiring the tech I’ll need to install in the engine or the computer to make this all happen.
The PN532 is a high frequency reader and the xEM is a low frequency transponder. Those two are not compatible.
While you can use both frequencies, one for each purpose, but I would suggest sticking to one of them as this would allow you to use one chip for both.
I should mention that DT sells a dual frequency implant that contains both an NTAG216 chip (same as the xNT) and a T5577 chip (same as the xEM). This could give you additional functionality. This implant is the NExT.
You might want to test that before you commit to it. If the reader is on the inside, and the roof is sheet metal, then the reader might not be able to read the implant at all. You could either put the reader behind the window or windscreen, or something significantly more custom. For instance cut a small hole in the roof, put the reader in the hole, with a fibreglass patch. That would put the reader behind a fibreglass “window” which you should be able to paint over.
As someone who does a lot of crafty / makery stuff I LOVE the absolute chaos of the fiberglassing part of the video. It’s an honest view of what the first time for anything new looks like!