Crowd Depth Signal K Plugin

Collect depth and position data from a Signal K server and periodically submit to a trusted node API.

Installation

• Install the crowd-depth plugin from the Signal K server AppStore.
• Enable the plugin and open its settings.

Configuration

Configuring the plugin correctly is essential for accurate depth reporting.

• Path: Choose which depth path to use (belowSurface, belowTransducer, or belowKeel) depending on what is reported in your environment.
• Depth sounder offsets: Required x, y, z; optional draft, make, model, frequency, transducer.
• GNSS offsets: Required x, y, z; optional make, model.
• Sharing: Set anonymous to hide vessel name/ID; data is still tied to a unique UUID.

How it works

1. Collection - Data is collected in one of two ways:
   1. If you're using a plugin that offers a History API (like signalk-to-influxdb2), this plugin will not store any additional data, but will query the history API for depth/position data when it's time to report. Your historical data will also be reported.
   2. If no History API is available, the plugin will store depth/position data locally in a SQLite database.
2. Reporting - Data will be reported on a schedule to the API. Each report signs the vessel identity and uploads a GeoJSON file to the trusted node API.
   1. Data is reported every day at midnight in your local timezone, but can be changed by setting a cron-style schedule in BATHY_DEFAULT_SCHEDULE="0 0 * * *" environment variable).
   2. The target endpoint defaults to BATHY_URL (production: https://depth.openwaters.io, otherwise http://localhost:3001). Override via environment variables on the Signal K host.

Contributing

From the root of the monorepo:

• Build: npm run build -w crowd-depth
• Tests: npm test -w crowd-depth
• Install the plugin into a local Signal K server for development:

  cd packages/signalk-plugin
  npm link -w crowd-depth
  cd ~/.signalk
  npm link crowd-depth

• Watch for changes to the plugin: npm run dev -w crowd-depth
• Restart the Signal K server whenever the plugin changes.

Notes

• The plugin corrects depth positions using configured sensor offsets and marks data as unprocessed for tides/vertical datums.
• Includes a helper CLI xyz-to-geojson (installed with the package) for converting XYZ files to GeoJSON.