One LED cannot say two things at once, and in the default presence
mode the status LED is already carrying "a card is here". The result
was that a bad read - a checksum failure - was reported not at all:
verified by driving the LED worker, which showed presence mode
producing no light on invalid_card while error mode blinked.
A second LED on its own pin (GPIO 24 = physical pin 18, matching the
workstation app) now pulses for --error-pulse seconds on a bad read,
leaving the status light to keep tracking the card. This also gives
ERROR_BLINK_SECONDS, previously dead, a real use.
--error-led-pin N / --error-led-active-low / --error-pulse S
--no-error-led restores the single-LED blink
install.sh rewrites the unit's ExecStart for all of it, verified for
the default, active-low and no-error-led cases.
Also extracts the repeated backend-opening code into _open_led(),
which keeps the BadPinFactory-is-an-ImportError subtlety in one place
instead of two, and treats the error pin colliding with the status
pin as "no error LED" rather than opening one pin twice.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
active_high was hardcoded to True, so an LED wired the other way
round - cathode to the pin, anode to 3.3 V, or an inverting
transistor driver - had no configuration at all. The symptom is easy
to misread as a dark LED: the light actually does the opposite, on
with no card and off with one.
Exposed as --led-active-low on the app and on install.sh, which
rewrites the unit's ExecStart like the other LED options. The
startup line now names the polarity, so the journal says which
configuration is actually running:
LED on GPIO 23 (presence mode, active-high, gpiozero)
Default is unchanged, so existing installs behave identically.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
- keyboard.py: emulate a commercial USB RFID reader by typing card ids
into the focused window via a /dev/uinput virtual keyboard
- led.py / bridge.py: drive the status LED from card events
- cli.py, card.py: wire up the new options and event flow
- deploy: harden install.sh and the systemd unit
- README: document keyboard mode, LED support, and deployment
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
ske087