With the STEMMA QT port you can attach something like this $4 RFID breakout[1] and have a badge that people can scan at a conference to get your details. No soldering needed, you can connect it directly to the board with a $1 cable and it's probably easy to program with MicroPython, although I'm not sure how extensible their "Badge OS" is.
edit: there's no MicroPython library for it apparently, but the datasheet[2] is pretty detailed. I've written Python libraries from such protocol definitions before, it's not too difficult.
Comments
That's really cool!
It would be interesting to see it be more commercially-viable. It probably wouldn't really work with NFC (but I'd love to be wrong).
It would also be great for spy movies.
With the STEMMA QT port you can attach something like this $4 RFID breakout[1] and have a badge that people can scan at a conference to get your details. No soldering needed, you can connect it directly to the board with a $1 cable and it's probably easy to program with MicroPython, although I'm not sure how extensible their "Badge OS" is.
edit: there's no MicroPython library for it apparently, but the datasheet[2] is pretty detailed. I've written Python libraries from such protocol definitions before, it's not too difficult.
[1] https://www.adafruit.com/product/4701
[2] https://www.st.com/resource/en/datasheet/st25dv04k.pdf
Why wouldn't it work with NFC? NFC doesn't require onboard power, the reader powers it.
I think that they don't have it set up for NFC.
If they did, the chip could be programmed, along with the badge face.