ACR122U is a 13.56 MHz PC/SC (CCID) reader, not HID. Browsers can't
talk to PC/SC devices directly, so the kiosk JS can't see ACR122U
taps the way it sees a USB-HID reader.
This daemon bridges the gap:
- Polls the ACR122U via pyscard
- Reads UID via the standard ACS GET_UID APDU (FF CA 00 00 00)
- Types UID + Enter into the focused window using pyautogui
- Debounces re-reads of the same card (2s window)
Output format matches FusionClockNfcKiosk._normalize_uid() expectations:
colon-separated uppercase hex (04:10:5B:CA:FD:22:90 + Enter).
The kiosk JS already has a keyboard-wedge listener (v19.0.3.2.0+),
so no server-side or kiosk-side changes needed — wedge.py's
keystrokes route through the same handleTap() path as a USB-HID
reader, preserving photo verification + penalty + activity log.
Setup docs include macOS, Windows, Linux instructions plus
launchd/Task Scheduler/systemd snippets for running as a service.
Strategic value: with this, ACR122U deployments support UA-Pockets
(13.56 MHz DESFire EV3) for single-card door+clock setups in the
premium tier of the standard product kit. The 125 kHz EM4100 USB-C
HID reader remains the default tier.
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