# Diagrams (Mermaid) — NowYouSea

## Station — Wiring / Connections

```mermaid
flowchart LR
  subgraph Sea[Sea / Underwater]
    H3x[Aquarian H3x Hydrophone\nXLR output]
    MS[MS5837-30BA\nPressure+Temp]
    Cond[Conductivity probe\nTBD]
  end

  subgraph Station[NowYouSea Station]
    XLR20[XLR cable 20m\n(shielded)]
    Rubix[Roland Rubix 22\nUSB Audio Interface]
    Pi[Raspberry Pi 4\n(Compute)]

    Router[GL.iNet Puli GL-XE300\n4G Router (OpenWrt)\n+ own battery]

    Daisy[dAISy AIS receiver\n(USB)]
    AISA[AIS Antenna\n(VHF 156–162 MHz)\nRG58 coax 3m]

    MPPT[MPPT Solar Charge Controller]
    Panel[Solar panel 100W]
    Batt[AGM 12V 60Ah\nCar battery]

    Matek[Matek BEC12S PRO\n9–55V -> 5V (5A)]
    DC12[12V distribution\n(fuses/switches TBD)]
  end

  %% Audio
  H3x -- XLR --> XLR20 --> Rubix
  Rubix -- USB --> Pi

  %% Network
  Pi -- Ethernet/Wi‑Fi --> Router -- 4G --> Cloud[(Backend / Cloud)]

  %% AIS
  AISA --> Daisy -->|USB| Pi

  %% Sensors (TBD)
  MS -. I2C / SPI (TBD) .-> Pi
  Cond -. (TBD) .-> Pi

  %% Power
  Panel --> MPPT --> Batt --> DC12
  DC12 --> Matek --> Pi
  DC12 --> Rubix

  %% Router is external power domain
  Router -. self powered .- Router
```

## Data Flow (high-level)

```mermaid
flowchart TD
  H[Hydrophone H3x] -->|Analog audio (XLR)| A[Rubix 22]
  A -->|USB audio| Pi[Pi 4]

  Pi -->|Record| S[(Local storage)]
  Pi -->|Preprocess\n(filter/compress/events)| P[Edge processing]
  P -->|Upload\nraw/clips/features| R[GL-XE300]
  R -->|4G| API[Ingest API]
  API --> DB[(Storage / DB)]
  DB --> Dash[Dashboard / Alerts]

  AIS[AIS dAISy] -->|NMEA (AIS messages)| Pi
  Pi -->|Health metrics| R
```