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signalk-attitude-calibrator

v0.2.1

Published

SignalK plugin that applies configurable pitch, roll and yaw offsets (in radians) to navigation.attitude. Supports source filtering and publishes calibrated values as a distinct source to preserve the original data.

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Links

Git

Maintainers

macjlmacjl

Keywords

signalk-node-server-plugin

Readme

signalk-attitude-calibrator

SignalK plugin that applies fixed offsets (in radians) to navigation.attitude pitch, roll and yaw values.

The calibrated values are republished on navigation.attitude with the plugin as source, so both the original and calibrated values coexist in SignalK with distinct sources.

A feedback loop guard prevents the plugin from processing its own output.

Configuration

| Option | Description | Default | |--------|-------------|---------| | Source filter | Only calibrate values from this source label. Leave empty to calibrate all sources. | (all) | | Pitch offset (rad) | Value added to pitch. Positive = bow up. | 0 | | Roll offset (rad) | Value added to roll. Positive = starboard down. | 0 | | Yaw offset (rad) | Value added to yaw. | 0 |

How it works

At each update received on navigation.attitude:

  1. The source label is checked — updates from the plugin itself are ignored (anti-loop guard)
  2. If a source filter is configured, updates from other sources are skipped
  3. The offsets are applied: calibrated = source_value + offset
  4. The result is published on navigation.attitude with source.label = signalk-attitude-calibrator

Units

All offsets are in radians. The plugin declares units: rad metadata for navigation.attitude.pitch, .roll and .yaw at startup.

Typical use case

Chain with signalk-attitude-converter to expose calibrated individual paths:

  1. signalk-attitude-calibrator — subscribes to navigation.attitude from your sensor source, applies offsets, republishes as signalk-attitude-calibrator
  2. signalk-attitude-converter (mode object-to-values, source filter = signalk-attitude-calibrator) — splits the calibrated object into individual pitch, roll, yaw paths

Installation

npm install --prefix ~/.signalk signalk-attitude-calibrator

Restart SignalK after installation, then configure via Server → Plugin Config → Attitude Calibrator.

Changelog

0.1.1

  • Added optional source filter to limit calibration to a specific source label
  • Added anti-loop guard to prevent processing the plugin's own output
  • Improved package description

0.1.0

  • Initial release: pitch/roll/yaw offset calibration in radians

License

MIT — Jean-Laurent Girod