# Lullalink

Peer-to-peer baby monitor for Flutter.

- **Child device** (one phone, near the baby) streams audio, video, and
  gyro/accelerometer data to the **parent device** (the other phone, near the
  parent) over WiFi — no cloud, no server.
- **Secure by default**: all streams use **mutual TLS (mTLS)** with self-signed
  certificates. Two phones trust each other by scanning a **QR code** of either
  device, and a pairing passphrase is required by default.
- Audio and video streaming are each independently toggleable on the transmit
  side (child) and the receive side (parent).
- The parent sees a live audio **gain graph**, a **frequency spectrum** of
  captured audio, and a **movement graph** derived from the child phone's
  gyro/accelerometer (phone rests on the bed → baby movement is visible).
- The parent can configure **notification thresholds** (e.g. sound level,
  movement frequency).
- Future (v0.2): optional on-device ML on either device for movement
  classification and audio/sound-type classification.

## Development

Tests — including all UI/graphical tests (golden/widget tests, fake plugins,
no physical device) — must run and be verifiable entirely in **headless CI**.