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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@werty1st
Should it be possible to turn the Puck into an Fido2/U2F device?
I found this
https://wiki.makerdiary.com/nrf52-u2f/building/
and this
https://github.com/uru-card/uru-card