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The Feitian R502-CL (and cheap CCID readers generally) can wedge: it keeps detecting a card but every APDU returns "card absent or mute", and ONLY a USB power-cycle clears it — restarting pcscd or the app does not (confirmed on-device). Until now that left cash-out/cash-in taps dead until a manual replug. - nfc-service.ts: count consecutive read failures; after 3 (gated by a 30s cooldown so a still-wedged reader can't reset-loop) trigger nfc-reader-reset.service. nfc-pcsc then re-detects the reader on USB hotplug with no app restart (verified live). - batm3.nix: nfc-reader-reset.service (oneshot, root) re-binds the reader's USB device (a software replug); reader-agnostic via the CCID interface class (0x0B) so it also covers a future ACR1252U. A polkit rule lets the unprivileged `bitspire` app start just that one unit. Hardware track (separate): the durable fix is a better reader (ACR1252U — large antenna for behind-panel, firmware-upgradable). This change makes any reader's wedge a ~2s self-heal in the meantime. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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