tap start, allow camera, finger over back lens.
no number in ~20s: hold finger flatter, cover lens fully, hold under a desk lamp or bright window so light bleeds through.
desktop webcam
—
press your finger to the webcam lens. needs decent ambient light.
manual bpm
posts a single reading. fades after 5 minutes.
system test
—
streams a fake but believable bpm pattern (65±10) for 60 seconds. confirms her end is receiving.
tagged src='test' on the server.