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Not Arduino, but there is an open-source fingerprints reader for RPI: https://www.raspberrypi.org/blog/raspireader-fingerprint-sca...

Is it that much worse in smaller form-factor? NDA only?






There is small UART biometric module https://www.digikey.com/products/en?keywords=2304-100018754-...

The biggest downside - it's more that 3 times more expensive than the device I have now.




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