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 sol

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 https://www.adafruit.com/product/4701 [2] https://www.st.com/resource/en/datasheet/st25dv04k.pdf https://www.st.com/resource/en/datasheet/st25dv04k.pdf