Hi all, I think there's some confusion about what I've tried and when so I hope this clears up some of that. This occurred to me but apparently...

@davee @zanderI enjoyed reading your discussion, I'm going to write down my takeaways and some more questions.I have the V3 board:It seems like the ca...

@zander Yes. The same as the Fritzing diagram I've posted. 3.3v external with connected ground over i2c.

@zander 3.3v

It seems that connecting the grounds solved the issue! I will report back later today with some more information when I have some more time but just w...

Have some instant gratification, here I am reading a tag, just not with external power :)

That is what the i2cdetect commands from my first post are depicting. The 24 is the response of the pn532 when it's connected to the Pi's power. That ...

@davee Here's a basic Fritzing diagram. I've also taken a picture of my physical setup in my last post. Image:/p> Fritzing file:/p> I bought ...

Thanks for the responses everyone! @zander That makes sense. This supply has a 5V mode so I tried switching to that with the same result unfortunate...