Calculate pressure trend and get weather predictions from a barometer over time. Are there foul weather on the way?
- A barometer, i.e. the bme280, outputting
'environment.outside.pressure'to SignalK - Optional: GPS-coordinates to determinate if located in northern | southern hemisphere (default: northern)
- Optional: Temperature sensor and GPS-altitude for increased precision
Install the plugin through the SignalK plugin interface. 'Enable' it through the Plugin Config interface.
- Sample Rate: More | fewer readings. This may result in a more | less "jumpy" barometer-trend. (Default = 60).
- Altitude Offset: Ajust for any differences between your sensor altitude to GPS-altitude. (Default = 0).
It might take a couple of minutes before the plugin show any data, as it need to collect pressure readings to calculate a trend. The plugin will not change the pressure readings you observe in SignalK - only internally for calculations.
The plugin outputs several new SignalK-values, such as:
'environment.outside.pressure.trend.tendency'
'environment.outside.pressure.trend.severity'
'environment.outside.pressure.prediction.pressureOnly'
...
The plugin saves all barometer readings every 3 minutes and when the plugin is disabled. Within a timeframe of 3 hours it should be able to read meaningful data when the plugin is started again.
Based on the severity value it's possible to set an alarm, using the Simple Notification-plugin (see severity table below).
'environment.outside.pressure.trend.severity'
| FALLING: | RISING: |
|---|---|
| (0) FALLING.STEADY | (0) RISING.STEADY |
| (-1) FALLING.SLOW | (1) RISING.SLOW |
| (-2) FALLING.CHANGING | (2) RISING.CHANGING |
| (-3) FALLING.QUICKLY | (3) RISING.QUICKLY |
| (-4) FALLING.RAPIDLY | (4) RISING.RAPIDLY |
Please feel free to contribute to this plugin by creating an issue and/or a Pull Request including test code.
- See all disclaimers by reading the README at the GitHub project 'barometer-trend', also by the same author, to understand the limitations of this plugin.
This is actual data while developing the plugin. A tropical wave, OT-48, was moving through the Caribbean creating local heavy rainfall and stormy winds in Guadeloupe.
The above GIF-animation is actual radar image from Meteo France at the time.
The above satelitte photo animation is from NOAA.